전자설계프로젝트

전자설계 프로젝트    Projects #1       Antennas       Amplifiers       Filters       Power Supplies       RDF       Receivers       Transmitters       Test Equipment       Tutorial    Projects #2       Alarms & Security       Automotive       LED       Radio Frequency       Test Equipment       Timers & Oscillators       Transmitters    Projects #3       Data Acquisition       Infrared       Laser       Microcontroller       Motor Control       PC       PDA    Projects #4       Audio Amps       Audio Preamps       Misc. Audio       Filters       Games       Medical & Health       Models       Music    Projects #5       Lighting       Miscellaneous       Power Supplies       Solar Power       Telephone & Intercom       Video   More Good Stuff     APRS Map of Georgia     APRS 18-Wheelers     APRS Around the World     The Weekly Rant     Space Weather     ARES Forms & Manuals     The Shack Cats   Charts & Tables     10-Codes     49Mhz Frequencies     900MHz Frequencies     AM Clear Channels     AM Broadcast Band     AM Broadcast Mexico     Air Band HF Frequencies     Air Band VHF Frequencies     ASCII Character Chart     ASCII Control Codes     Baudot Code     Band Plan for HF     Band Plan for VHF     Band Plan for UHF     CB Frequencies     CB Keydown     CB Lingo     Civil Air Patrol     Coax Cable Data     CTCSS Tones     CW Abbreviations     Dot & Star Frequencies     DTMF Tones     EMD Codes     FM Broadcast Band     FRS Frequencies     Gain Table     GMRS     Ham Bands     Hexadecimal-Decimal     Hexadecimal-Octal     Hurricane Nets     Octal-Decimal     Maritime HF     Maritime VHF     MURS Frequencies     NOAA Frequencies     Phonetic Alphabets     Public Service Frequencies     Q-Codes     Radio Glossary     Railroad Frequencies     Repeater Lingo     RF Spectrum     Shortwave Bands     SWR Table     TV Frequencies     TV Cable Frequencies     UTC Chart     Wire Table     Wireless Mic   Links     Local Links     Georgia Links     More Links     Mega Links   Scanning & Shortwave     Georgia Scanner List     State of Georgia List     Robert's Scanner Info     Ruff's Scanner List     Clarke Co Frequencies     Old Scanner List     Shortwave   Equipment Frequency List     Dual Band Mobile     Dual Band HT     DB Blueface #1     DB Blueface #2     Old Mobile #1   Ol'Geezer Group Archive     Field Day Pix #1     Field Day Pix #2     Field Day Pix #3     Field Day Pix #4     Ol'Geezers Clean House     Ol'Geezers Fix Repeater     Classic Ol'Geezers #1     Classic Ol'Geezers #2     Waynesville Fest     Dayton 2000     Dayton 2002   Weather     Space Weather     AHN Runway WX     AHN 10 Day Forecast     Atlanta WX Radar     Cold Mountain Webcam     NOAA Watch/Warnings     NOAA.GOV     Tropical Storms     ATL Nexrad Wx Radar     SE Radar Loop     US Radar Loop	아래 열거한 프로젝트를 상업적으로 활용하는       것은 저작권 침해에 저촉될수 있음을 알림니다.         다만, 설계참고용으로 응용바랍니다.   -naryseo-     下並べたプロジェクトを商業的に活用する      のは著作権侵害に抵触することもできます.       ただ,設計参照用で応用願います.      就商业来说灵活运用下边被以排列了的      PROJECT能与著作权侵害抵触。      不过供,设计参照使用的,并且请应用。   Strain gauge sensor Digital Water Wave/Tide/Level Meter (PIC16F876) Self made data-logger V2.5 (second edition) Magnetometer      자계메터 Analog input section based on AD9220 uModem 4+4/8 channel A/D board ADXL202 accelerometer to CV output Light direction sensor     광검출센서 12-Bit ADC interface   12비트아날로그디지탈인터페이스 Digital thermometer      디지탈온도계 Universal flight controllers / datalogger Rain detector      비 검출기 Home Brew Compass Sensor Using 555 Timer as an A/D converter ADC0804LCN 8-bit A/D converter Web-based thermometer project Low Flow-Rate Thermal Flowmeter Geiger counter Differential Capacitance Measurement for Tilt Meter Honey Bee counter (PDF) Capacitance type liquid level measurement (PDF) Thermostat node schematic Digital PC Oscilloscope Ultrasonic Range & Imager Precision Digital Altimeter Digital compass schematic     디지탈나침반회로 Temperature datalogger      온도 데이타로거 Serial Port A/D-converter     Centronics port D/A converters and low-pass filter LCD Thermometer     액정온도계 Acceleration monitor using Analog Devices ADXL202 Optical sensor using PIC12C508      PIC12C508을 사용한 광센서 Wireless Liquid Level Sensing for Restaurant Applications Accelerometer Schematic     Pressure Sensor-Based Altimeter Circuit Ultrasonic range finder circuit     1-wire barometer Water-level sensor      수위센서 Addressable ADC Electronic altimeter using PIC16F877 Wireless weater station 적외선(Infrared) IR detector Infrared body heat detector Stereo IR audio receiver General purpose IR receiver Wireless IR headphone transmitter Wireless IR headphone receiver Infrared remote control shutter release system Infrared transmitter for locomotives Infrared gate for door Infrared circuits for remote control Serial port controller infrared transmitter (PIC16F628) IR Receiver (Amplitude Modulated IR) IR Transmitter for Audio (Amplitude Modulated IR) Digibox interface IR remote control Long Range Infrared Remote iRDA to TTL interface 40KHz light receiver (PDF) 40KHz TV-VCR repeater (PDF) Micro based PIR to IR remote converter IR-related ASCII Schematics V1.00 Infrared remote transponder Build an Infrared night scope Decoding IR Remote Controls IR detector PC IR Remote Control Hardware PC IR Remote Control An Ambient-Light-Ignoring Infrared Active Motion Detector Infrared Transmitter and Receiver schematic diagrams Pyroelectric Infrared Sensor Minimal Infrared transmitter for PC Simple IR transmitter circuit Simple infra-red detector AVR (AT90S2313) serial port infrared receiver Infra Red Switch IR remote control extender IR Remote Control Extender Circuit (Mark 2) IR Remote Control Extender Circuit (Mark 3) IR Link IR remote control tester 40khz IR Tester 555 timer 40khz IR Oscillator IR detector / emitter Fire-Stick infrared remote control Simple infrared remote control Infrared / Ultrasonic beacon Implementing Infrared Object Detection IR detector for robotics Computerized Infrared Remote 레이저(Laser) Light beam receiver for laser pistols 12V supply for He-Ne laser Laser diode transmitter Laser power supply Laser transmitter/receiver Laser harp Laser Telephone Receiver Circuit Fiber Optic Voice Communications Efficient Laser Supply 20MHz VCSEL 3mW laser test circuit (PDF) 10MHz to 20MHz laser light detector (PDF) Micro-power 40KHz burst laser diode driver (PDF) 40KHz laser burst detector (PDF) Modulated laser diode tester (PDF) Ar/Kr Ion Laser Power Supply Laser diode power supply circuits RS-232 Laser Transceiver HeNe laser power supply OPT201 Laser receiver OPT301 Laser receiver Laser transmitter schematics Diode Laser Power Supplies Laser bug circuit RS-232 Laser Transceiver Experimental laser data link Ar/Kr Ion Laser Power Supply Design Simple laser communicator 마이크로컨트롤러(Microcontroller) PIC based packet radio encoder (PDF) RS485-Version of the SAB80C535-Microcontrollerboard PC IR receiver based on PIC16F84 Record and play fast 1-bit sound on a PIC micro AT89C2051/4051scanning 7-segment display and keypad AT89C2051/4051 Driving dot LED AT89C2051/4051stepper motor interface AT89C2051/4051connecting dumb terminal Motorola 68K SBC (single board computer) 8051 SBC (single board computer) Simple RS232C Level Converter using Transistors Motorola 68HC11 evaluation board C-52 EVB Robot Controller Mains clock controller using AT89C2051 AT89C2051/4051 Easy-Downloader AT89C51/52/55 Easy-Downloader PIC16F84 programmer PIC16F84 miniature real-time controller Isolated RS232 for PIC16F84 PIC16F84 debugging terminal MiniLOGGER V1.0 Analog datalogger based on T89C51RD2 Atmel 89C Series Flash Microcontroller Programmer Atmel 89C2051 prototype board AT89C2051 real-time controller PIC12C508 Night-light saver AT89C2051 Night light saver Atmel 8051 Flash Based-Microcontroller Programmer AT89C2051 Digital thermometer and clock 4-Channel Timer using Atmel 89C4051 and MAX7219 display driver PIC16F84 CW decoder (PDF) 12C508 Smart Lock 80C31 stepper motor controller Build a PIC controlled DDS VFO, 0 to 6 MHz PIC controlled DDS VFO, 0 to 6 MHz Basic Stamp Lightning Activity Monitor Parallel AVR programmer PIC16F84 line following robot PIC16C505 IR / wireless remote control Automatic door opener with PIC12C508 RS485-like multi-drop bus with half duplex serial protocol WWWpic2 - A web server in a PIC PIC16F84 web server 50 MHz frequency counter, voltage meter & SWR/PWR indicator Microcontroller board using the Atmel AVR AT90S8535 Programmer PIC16F84,12C50x and EEPROM 24Cxx RDS Encoder - digital part PIC programmer for serial port Fully functional PS/2 mouse based on the PIC16F84 PIC 18 programmer (PIC18F458, PIC18F452, PIC18C252, PIC16C745, PIC18F6620, etc) Foreign vocabulary recollector Illuminate holiday destinations on a world map Embedded system to send e-mails (small TCP/IP stack) Speaking clock using PIC & ISD device Speaking doorbell using PIC & ISD device Whistle detector using 8-pin PIC PIXpand PIC16F877 to IDE interface 68HC11 stepper motor control 90S2313 AVR Robot Board POCSAG encoder/decoder Network Time Protocol AVR Clock DS1820 Temperature Sensor Readout Unit Rotating Sprocket Wheel Generator (PIC16F84) Talking PIC - based on SP0256 Serial to parallel converter using the AT89C2051 AT89C2051 serial COMs to LED driver PIC16F877 Programmer And Development System DS1820 Arbiter V2.00 Schematic Microchip PIC ICSP implementation 101 AT Keyboard to ASCII Decoder using 68HC705J1A MCU LCD Serial Terminal Propellor clock (PIC16F84) Optical sensor using PIC12C508 Interfacing S-7800A to PIC16F877 A Scenix (and PIC) Programmer MMC to PIC16F876 circuit diagram 8088 maximum mode SBC EZ80 single board computer schematic (Z80) 8051 Development System Circuit Board Voice recording and message retrieval system Interfacing a GPS to an LCD using a Microcontroller Long-period watchdog timer PIC16F84 Range Finder Project Generate video signals in real-time using a PIC16F84 PIC ICD PIC Project #1 - RS232 to I2C Interface Galvanic decoupling of I2C bus Programmer PIC16F84,12C50x and EEPROM 24Cxx Dual PIC16C84 prototype board Graphic LCD interface FSK modem with PIC16C84 Talking YODA project (PIC16C84) PIC16F84/PIC16F87x-In-System-Programmer Microcontroller interface for 5KW microwave oven Using an I2C Serial EEPROM with a Basic Stamp 2 PIC16F84 Based Morse Code Reader AVR-Based Serial Port IR Receiver Interfacing piezo elements to a microcontroller Victoria TAFE programmer (based on AT89C2051) JDM programmer PIC micro programmer Speech recognition using HM2007 PIC microcontroller servo motor interface PIC micro multiple servo motor interface PIC16F84 countdown timer PIC16F873 ultrasonic range meter PIC16F873 Digital clock PIC16F873 remote display PIC16F84 stepper motor controller Way small web server PICADC - a free, PIC based "intelligent" A/D converter 8051 development system circuit board 8088 maximum mode single board computer (SBC) Basic 89C2051 / 89C4051 circuit diagram Debugging dump terminal for 89C2051 designs Easy debugging terminal Galvanic decoupling of I2C bus Circuits interfacing piezo elements to a microcontroller Driving a TRIAC using a PIC12C508 Isolated RS232C for PIC16F84 Microchip ICD (in-circuit debugger) circuit diagram Microchip PIC ICSP implementation circuit diagram Interfacing NMEA GPS to LCD using PIC16F84 PIC ICD (in-circuit debugger) PIC16C71 morse code callsign generator PIC16F84 to LCD interface PIC16F84 I/O expander with PicBasic Scanning 7-Segment & Keypad 10-key serial keypad encoder Simple RS232C Level Converter using Transistors Talking PIC microcontroller using SP0256 PIC-Programmer 2 Connecting PIC12C508 8 to 93AA46 serial eprom KD7LMO Micro Beacon (PIC18F252) GPS LCD Display Project PIC16F84 LED chaser PIC micro LED projects PS/2 keyboard keystroke logger based on Atmel 89C2051 Electronic distance meter based on Motorola 68HC908QY4 Fan timer based on Motorola 68HC908QT2 Atmel AVR and 8051 series ISP programmer AT89C2051 line-follower robot Night light saver (PIC12C508) USB and GLCD expansion board for 8051 SBC Basic stamp interface circuits Microcontroller sensor and actuator interfaces Giant money counter (PIC16F876) PIC12C509 logic gate replacement for nitrogen filler PIC demo board PIC12C509 Gym Timer PIC LCD and Keypad driver PIC12C508 Phase Controller for 2kW heater PIC16F84 TRIAC / IGBT brightness phase controller PIC16F84 pulse monitor with date/time output (ZIP) Programmer for the 68HC705C8 MicroController 27c801 EPROM Programmer Project LCD to PIC16C54 schematic 68HC11 based RDS decoder Acceleration monitor using ADXL202 and AVR 40+ MHz 5-digit frequency counter with an AVR 2313 Interfacing DRAM to AT90S8515 Temperature monitor/controller: AVR 2313 / DS1621 PIC micro to ISA bus interface PIC16C84 VT-52 Emulator for Linux Microchip PIC ICD (in-circuit debugger) Tony Nixons Pocket Programmer (PIC) PicoWeb V5.1 (AT90S8515) tiny web server Atmel 89C2051 In-Circuit Programmer Schematic 8051 Development System Circuit Board 8051 Development System Circuit Board Microprocessor using Xilinx FPGA Temperature controlled based on AT89CX051 I2C LCD interface AFSK 1200 Modem based on PIC16C620 PicCon - Hidden Radio Transmitter Controller PIC16F84 tone generator with source code PIC16F84 tone generator PIC16F84 tone generator (6-Bit) AVR Beacon Super Keyer AVR Frequency Counter AVR Digital Voltmeter AVR Signal Generator Ser-Key 10-Key Serial Keypad Encoder 2-wire LCD interface using PIC16CF84 PIC16F84 Serial I/O-expander with PicBasic RS 485-RPT Schematic Camera remote control system using Basic Stamp Low cost Atmel in-system programmer Ultra low-cost programmer for AT90S family AVR to USB interface Programable LCD counter with memory backup based on Atmel AT90S1200A Connecting AT90S2313 with LCD display 2x16 char and 4x4 keypad Atmel AVR RCEN fuse bit programmer Electronic safety lock based on ATtiny26 GSM SMS remote control using AVR microcontroller 128x64 LCD Driver for AT90S2313 (ZIP file) Connecting LED to PIC Micro I/O pins (PDF) Microprocessor RS-232 Reset AT90S8515 experimenter board Multi-chip programmer for PIC microcontrollers Buffered PIC chip interface A PIC-Based Keyboard Emulator PIC-based robot ScanMate audio activated recorded PIC vacuum fluorescent display interface PIC18F252 bootloader schematics PIC16F876 Datalogger GPS Repeater Kodak DC-20 camera interface (PIC12C509) Kodak DC-20 camera interface (PIC16F84) PIC ICD in-circuit debugger circuit diagram PIC programmers for parallel port Wisp628 ISP Microchip PIC Programmer WLoader - PIC16F877 application loader / bootloader Nixie clock (PIC16F876) Zilog Z80 thermostat embedded web server Picxie 2 - 8x8 Animated LED Signboard (PIC16F84) Picxie 2 - 8x8 Animated LED Signboard 10 tricks for interfacing to the PIC16C508 Interfacing the PIC16C508 PIC 5x7 display Analog to digital conversion notes Multi-chip programmer 모터제어(Motor Control) Bridge head PWM motor controller Transistor relay driver Latching relay driver Relay delay circuit Touch switch Low voltage DC motor speed controller Flashing neon christmas lights Three input first response monitor Switch-on delay circuit Electronic thermostat LM3911 temperature controller Programmable light-activated relay Simple 10 Stage Control Box One component stepper motor driver Dual Stepping motor drivers using UDN2540 PWM DC motor control with SG3525 Stepper Motor Driver using TEA3718/3717 Microstepping with PBM3960 and TEA3718 DC Motor Driver with L6203 Stepper Motor Driver using L298 and L297 Several stepper motorol control circuits Wireless RF PWM dual motor controller H Bridge Motor Control Circuits Motor speed controllers Ceiling fan speed control Delayed off light switch Deoderizer fan timer Electronic Thermostat Relay Circuit Interfacing 5 volt CMOS to 12 volt loads Light Activated Relay CMOS Toggle Flip Flop With Relay(CD4013) 555 Timer Monostable Circuit Using Pushbutton Dual Channel Servo Pulse to H-Bridge Interface Current loop interface Switching solenoid driver Modular relay system Light/dark detector Pulse Width Modulation DC Motor Control Stepper motor controller Touch switch Pump controller H-Bridge motor controller (5 amps, 100 watts) Dual Channel Servo Pulse to H-Bridge Interface Servo pulse to PWM converter 12V Sump Pump Control Rolling code 4-channel UHF remote control DC Motor Speed Controller 3 Phase Brushless DC Motor Xtal Based Controller DC motor controller Garden moisture controller Overload Voltage Protection with Automatic Reset Pulse Width Modulator Pulse Width Modulator Motor Speed Control Pushbutton one-shot and latch (PDF) Charge coupled bi-directional power MOSFET relay (PDF) Finger touch activated switch (PDF) Machine vibration triggers hour meter (PDF) Solid state relay (PDF) Line-powered Xenon flash transmitter (PDF) 9V Xenon photoflash controller (PDF) AC switching with TRIAC from TTL Control 120VAC relay with TTL Driving a relay with a CPU Power-line Appliance Controller Simple Switched Servo Driver Combination-controlled, fully customizable RF remote control Thermoelectic controller (scriptable thermometer) Stepper motor positioner Stepper motor driver Thermostat Frequency switch PIC16F84 RF remote controller Stepper motor controller H-Bridge shematic DS1821 programmable thermostat Hot Water Tank Indicator Temperature monitor Cold activated switch Voltage comparator switch Dark activated switch DC Push Button Motor Control Circuit Light detector DC Motor Reversing Circuit Sound operated switch LDR light/dark activated relay switch Touch Switches 6090 digital decoder schematics Assorted relay control circuits Adjustable Voltage motor controller Serial servo controller DC Motor-Driver H-Bridge Circuit PWM Motor Speed Controller / DC Light Dimmer Constant Temperature Circuit PWM DC Motor Speed Control Solenoid starter CO2 controller for planted tanks Light activated relay Delayed shutter control for Kodak DC-20 Gasoline generator automatic throttle controller Block power switching module MOSFET H-BRIDGE schematic and theory 퍼스널컴퓨터(PC) I2C printer port adaptor RS232C Level Converter PC electrically isolated RS422 interface using SN75176B or MAX485 PC electrically isolated RS485 interface using MAX487 or SN75176B Short circuit protected power supply from PC 12V supply Isolated Full Duplex RS232C Interface RS232 DB-9 switch to flip between two serial ports DB-9 Connector to DB-25 (both RS-232) Mac Serial Port (RS-422 DIN-8) to RS-232 DB-25 Modem Rockwell RCV336/ACF model V1433VQR ext. Genius Mouse schematics EEPROM programmer Commodore 64 24-bit parallel port interface with 8255 Sound Card Interface with Tone Keyer RGB oo Monochrome converter - Matches impedance of PC to CCTV monitor Ericsson phone to PC serial port interface PC serial port receiver Parallel port relay interface ISA 48 I/O digital card PC infrared iRDA interface using TFDS 4500 Jupiter card programmer USB to RS232 Dongle Parallel (Printer) Port Interface RS-232 line monitor and loopback cables The KD2BD Pacsat Modem A Serial Infrared Remote Controller PC Serial and Parallel Port Software and Interfaces Interfacing 16x2 character :LCD to parallel port RS-232 Protocol Analyser Interface cable for Casio QV-200 digital camera Radio clock for PC's A PC-Based LowFER Frequency Synthesizer General purpose 48-bit ISA parallel I/O card Power from RS-232 port PCI to ISA converter WatchDog for ISA Bus 4-channel 8-bit analog-to-digital converter for PC Printer port ADC Parallel port ADC based on MAX147 Analog Signal Acquisition for PC Printer Port More accurate PC/AT clock Getting power from RS-232 interface Barcode scanner Build your own iRDA SIR Transceiver (Dongle) using MCP2120 PC thermometer Dive computer interface Parallel port servo controller GPS receiver (Gamin, Eagle etc) to PC interface cables Connect two CD-ROM drives to one soundcard Headphone driving circuit for soundcards Get power out of PC parallel port Null Printer Adapter PC speaker volume control circuit How to get power from PC to your circuits RS-232 surge protection Simple RS-232 serial port buffer circuit Get power out of PC RS-232 port Sound Blaster Microphone Preamplifier Sega 3D glass interfacing circuits Convert Atari-style joystick to PC joystick port Fake Joystick circuit Using the joystick port as general purpose input Connect other circuits to PC joystick port Schematic of a standard PC joystick Simple PC SmartCard reader Fax to modem interface Analog to Digital Conversion (ADC) and Communicating with a PC Temperature sensor for PC Interfacing to an IBM PC/AT keyboard PC interface for point controller Linux Infra-red Remote Control (LIRC) Homebuilt RS232 LCD Interface Compter microphone CCD linear image sensor to PC parallel interface Laptop Computer Serial Port Power Booster Assorted computer interface circuits HamComm Interface Apple II/II+/IIe IDE Drive Interface Basic Stamp I & PC Relay Controller RS-232 to TTL cable Hi-Fi PC Speaker System IDE hard-disk interface for Amiga 500 How to construct Garmin GPS receiver interface cables iRDA printer adapter 160 Baud ALDL Hardware Interface AT PC Power Supply 1 AT PC Power Supply 2 AT PC Power Supply 3 AT PC Power Supply 4 AT PC Power Supply 5 iLINK Interface Digital Signals Decoding Interfaces 9-pin null modem cable RS232 - Lowe HF-225 interface RS232 to IrDA convertor using Vishay TOIM3232 Interfacing PC sound card to SSB rig Supply Derives Power From 3-Wire RS-232 Port 24-line PC digital interface (PDF) PDA Casio interface circuits SHARP palm-top/hand-held to RS232 serial converter Interfacing ultrasonic range finder to BrainStem Hamamatsu UVTron Interface to a BrainStem Casio interface cable Casio organiser hardware MIDI interface for Palm computers MIDI interface for Palm cradle MIDI interface for Visor USB MIDI-USB Cradle for Visor (Deluxe, Platinum) MIDI interface for Visor Casio datalogger Interfacing ADXL202 accelerometer to PalmPilot PalmPilot audio interface PalmPilot cradle to modem adapter PalmPilot connector pinouts PalmPilot serial port interface PalmPilot memory schematics Aladin interface PalmPilot turbo boost guage interface IBM PC keyboard to PalmPilot interface Aladin interface using op-amp Wireless local network for PalmPilot (large PDF)
	Alarms & Security Proximity alarm Electronic lock Electronic door codelock (PIC16F84) Moisture alarm Fridge door alarm Ultrasonic remote control & alarm system Wire loop alarm Digital entry lock Proximity switch Toxic Gas Detector Door knob alarm (PDF) Water seepage alarm (PDF) Micro-power over temperature alarm (PDF) Personal silent alarm system Active IR motion detector A Basic RF Transmitter for PIR Sensors PIR motion detector Simple alarm system Automatic door opener using PIC12C508 Home security project 5 Zone alarm circuit Miniature loop alarm Novel Buzzer Gate alarm circuit Modular Burglar Alarm Motorcycle alarm Enhanced 5 Digit Alarm Keypad Enhanced 4 Digit Alarm Keypad RF Alarm Single Zone Alarm Water Activated Alarm Water level alarm Perimeter monitor Digital combination lock Alarm control keypad Almost Ultrasonic Motion Sensor Touch activated alarm system Combination Lock (PIC16F84) Low power RFID transponder Automotive Electronic auto stethoscope Turn signal alarm Motorcycle turn-signal system Cigarette lighter 9V adaptor Analog Tachometer for Gasoline Engines Headlight on reminder with Light Adaptive Windscreen Wiper Control Car clock Car message display Car interval wiper Safety indicator light Speed limit alert Grand Cherokee Off-Highway Lights Engine control unit schematics Portable CD Player Adapter For Car Car battery charger Wireless Auto Tachometer Alternator Signal Detector Automotive alarm system Road ice alarm Automotive Anti-Lock Brake Control Driver Headlight reminder Breath Alcohol Tester controlling a car ignition system Simple car battery charger Parking sonar Fuel injector pulse width monitor BMW R Series Motorcycle Regulator Schematic 80188XL Engine Tachometer Integrate Fuel Pump Wire Security Cut Off with a Turbo Timer Simple Car Preamplifier and Artificial Earth FCD (Fuel Cut Defencer) Interface between GM's 5 Volt 8192 baud ALDL data stream and a PC serial port 5301 wideband fuel mixture display Wide Band Fuel Mixture Display 3rd brake light 12V to 9V car coverter Car Nicad charger Combination lock for car liftgate BMW motorcycle side stand protection mod LED Big 7-segment LED display board with SPI interface LED Flasher LED pulser with audible output IR Illuminator Flashing Christmas LED display ICL7660 LED flasher LM3909 replacement using discrete components Color fade LEDs shimmer randomly as though on fire LED power supplies for AA cells 1.5 Volt LED Flashers AC Line Powered LEDs Astable Multivibrator 9 Second Digital Readout Timer 9 Second LED Relay Timer 16 Stage Bi-Directional LED Sequencer, other sequencer and flaser circuits 10 Stage LED Sequencer 28 LED Clock Timer Fading Red Eyes Two Transistor LED Flasher 16 Stage Bi-Directional LED Sequencer Expandable 16 Stage LED Sequencer LED Photo Sensor Circuit LED chaser 7 Segment LED Counter 7 by 10 LED Moving Sign ( 27C512 EPROM) Sequencial LED Flasher with Reversable Direction Tri Color LED Controller with Serial Interface 1.5V LED flasher B (PDF) Low current LED flasher (PDF) 1.5V LED flasher A (PDF) Flashing LED advertising badge (PDF) Flashing LED advertising badge (PDF) Pulsed LED test circuit (PDF) Low battery voltage flasher (PDF) Adjustable flashing LED PWM white LED drivers Heart of LEDs Christmas Star Christmas tree LED Counter PIC16F84 LED chaser PIC16F84 LED signboard PIC16F84 LED signboard 2 White LED circuits Assorted LED circuits LED Mood Light LED Audio VU Meter Robot Beacon rotating light using PIC12C508 LM3909 LED flasher Animated LED signboard (PIC16C84) Picxie 2 - 8x8 Animated LED Signboard Radio Frequency UHF oscillator Economoy short-wave radio Linearized RF detector Two-band radio Shortwave conveter for scanners FM Bug AM Radio Toroidal coil RF shortwave receiver Crystal radio CW RECEIVER 40/80 meter CW receiver TRF AM Receiver circuit WLW 500KW Transmitter Schematic AM-Receiver for Aircraft communication (118.250MHz) AM receiver for aircraft communications 45-860MHz Radio receiver based on UV916-tuner 80 Meter CW ARDF receiver Four channel RF remote control CW zero beat indicator (PDF) Build your own VLF Receiver Receiver building blocks Simple wireless radio data link RX3302 receiver module schematic Superregenerative 27MHz receiver 49MHz walkie-talkie Convert 2m VHF FM PMR transceiver Motorola Radius M110 into an amateur radio Vibrating pocket bug detector 2MHz RF Oscillator 50-150MHz Overtone Oscillator Simple Op-Amp Radio UHF - 100W Transistorized amplifier 50MHz Converter RF front-end for triple conversion GPS receiver 2M - 20M transverter Improved CMOS RF PLL sythesizer Harmonic oscillator Direction finder system One transistor regenerative receiver Synthesized HF receiver TBA120 narrowband FM receiver TDA7000 receiver ZN414 receivers 10W HF linear amplifier 500W HF linear amplifier 3W HF QRP linear amplifier Phasing SSB exciter 500mW HF linear amplifier Generic VHF power amplifier 10.7MHz FM detector RTTY terminal unit Q-multiplier CMOS RF PLL sythesizer 3W FM Transmitter Crystal radio Op-Amp Radio Car radio tunes the Amateur Bands Crystal set that requires no antenna 80m Direct Conversion Receiver A compact L-match ATU for portable use Morse Adaptor for your VHF/UHF FM rig An end-fed antenna, L-match coupler and resistive bridge for HF AM Broadcast Band Regenerative Receiver 50 MHz to 146 MHz Converter Hear Amateurs on your Shortwave Radio! Compact 20 14 MHz direct conversion receiver Hear Amateurs on your FM Radio! RF actuated CW monitor LF to HF Converter Super 80 ultra-simple SSB receiver for 3.5 MHz Class B series modulator L-Band PHEMT LNA for GPS, Inmarsat etc Advanced VHF power meter The MRX-40 Mini Receiver 23cm Data Transceiver External antenna for the GPS-38, Magellan 2000, or Eagle Explorer GPS receivers AM Broadcast Band Active Antenna Active antenna with gain Ham Band VFO HF Signal generator Simple AM Radio Receiver & Amplifier Bug detector 175KHz inductive pulse receiver (PDF) 200-400 MHz voltage controlled oscillator AM/FM/SW active antenna RF Sniffer <.5 to >500 MHz Demodulator Schematic/Design AM BCB radio receiver Regenerative shortwave receiver 7MHz SSB Transceiver DSBSC (Double Side Band Supressed Carrier) Frequency Synthesizer Digital Automatic Gain Control (AGC) Four Channel Wireless Transmitter and Receiver Talking receiver PLL synthesizing oscillator (1) PLL synthesizing oscillator (2) PLL synthesizing oscillator (3) 2N2222 40 Meter CW/DSB Transceiver Yaesu FT-736R doppler compensation Phased lock loop schematic 30M PSK31 Transceiver SOP receiver (PDF) SOP direct conversion receiver Receiver 30m direct conversion receiver Popcorn direct conversion receiver 40m direct conversion receiver 80m direct conversion receiver Huge LED Antenna Direction Display (part 1) Huge LED Antenna Direction Display (part 2) 136 kHz direct conversion receiver One Watt 2.45 GHz Linear Amplifier 222 MHz Transverter VFO from 2001 ARRL Handbook, page 17.74 VFO from 2001 ARRL Handbook, page 14.20 Assorted RF circuits 14MHz SSB 10mW Transceiver Building a Simple LF Exciter Yaesu band decoder schematic 23cm Wide-Band FM data transceiver for high-speed packet-radio VLF radio receiver schematic 5 watt, 80 meter QRP CW Transceiver How to Build a 300MHz AM, RF Remote Control System RF Modem Robotics Project PLL FM transmitter ICOM CI-V interface with RS232 RTS to PTT Improved FM Stereo Modulator Smooth Tone Clickless CW Sidetone Generator Variety of receiver converter projects One transistor FM receiver 42 Mc Band to 88 Mc Band (retrofit converter) Project Crystal radio circuits including diode performance comparison 50MHz Assistant (Preamp & Power Amp.) Bug detector Basic RF oscillator Radio Control Electric Switch 56K RF Modem 80M ARDF direction finder Test Equipment Audible continuity tester Wire tracer Signal generator for signal tracer Electronic level Digital volt meter Adjustable continuity tested Frequency counter Tri-Waveform Generator 220V live wire-in-wall scanner Owens Bridge Inductance Measurement Device ESR Meter Line Output / Flyback transformer tester PC-Based Digital Storage Oscilloscope (DSOA) PC Based Digital Storage Oscilloscope Mk3 Simple 6-Digit 40MHz Frequency Counter Module Automatic stud detector Capacitance meter Capacitance meter AC Line Current Detector Triangle and Squarewave Generator Signal tracer / injector Voltage probe Live line detector Grid dip meter PCB VSWR bridge Electric field & leakage detector Simple polarity detector RCM710 Electronic Scale 3 - 12 MHz Signal Generator Some simple test equipment to build RF Power Meter for the QRPer Dip Oscillator for HF Two Tone Audio Oscillator (use for SSB tests) Simple pH meter Temperature compensated pH meter pH meter with calibration Four Channel Oscilloscope Adapter Arbitrary Waveform Generator Digital Pressure Gauge Remote Field Strength Meter Digital frequency counter Function generator High / Low indicator AC/DC LED Indicator Micro ohm meter Micro volt probe MOSFET tester Power factor meter Ramp generator LASER/LED light output intensity meter (PDF) Frequency and capacitance meter Resistor decade box Simple light sensor adapter for oscilloscope Time Domain Reflectometer (TDR) 40MHz frequency counter using Atemel AVR 2312 microcontroller pH Meter Multi Wire Cable Tester Connection tester EMF field probe Function generator Logic probe Zener diode tester Mini DDS (direct digital synthesizer) LCD frequency counter (PIC16F84) Pulse Reading Logic Probe Pink Noise Generator for Audio Testing Audio Millivoltmeter Audio Test Oscillator Full Featured Transistor Tester Opamp Design and Test Board Microphone Circuit Test Oscillator Distortion Analyser Self Oscillating Amplifier for Distortion Testing 120MHz frequency counter Capacitance meter that connects to multimeter Transistor tester and signal injector Continuity tester Square wave oscillator (555) Build a Magnetic Field Immunity Tester 555 Timer IC Tester 555 go / no-go tester 12V Lead-Acid Battery Monitor Continuity tester 2 Continuity tester Logic probe 4-channel DSO for oscilloscope Field strength meter for the 137 kHz band In-circuit electrolytic tester PIC logic probe with pulser Timing & Oscillators Budget timer Long period timer 555 time delay circuit Low frequency clock Countdown timer with relay DDS using AD9835 1 Second Time Base From Crystal Osc. Power-On Time Delay Relay Circuit Low Voltage , High Current Time Delay Circuit Power-Off Time Delay Relay Circuit Generating a Delayed Pulse With a dual 555 Timer 1KHz Sinewave generator Timed beeper GPS receiver clock circuit Time Delay Relay Time Delay Relay Wide-swing Variable Crystal Oscillator Circuit that momentarily closes a pair of contacts at long intervals Onboard Fogger Timer Colpitts 1 to 20 MHz Crystal Oscillator Divide By 1-1/2 Circuit Simple sinewave generator Two Transistor Sine Wave Oscillator 10 Hz to 10 Khz VCO with Square and Triangle wave Line powered 60Hz clock generator (PDF) Micro-power pulse generator (PDF) Darkroom camera shutter timer Divide by 1.5 counter (PFD) High-output square wave generator (PDF) D Flip-flot one-shot circuits (PDF) Clock divider Clock doubler CMOS oscillator Crystal 32.768KHz CMOS Oscillator Crystal oscillator Cheap 40KHz clock Stable 40KHz clock 'Rounding Off' a square wave Switch debounce using 555 Square wave to sine wave converter Day / Night / 24 Hour Select Sensor One transistor timer Variable timer Micropower pulse generator (PDF) Square wave oscillator Triangle wave oscillator Sawtooth wave oscillator Sine/Cosine wave oscillator 555 timer 555 oscillator Stable multivibrator (IC) Stable multivibrator (Transistor) Timer based on Microchip PIC16F628 Push Button Switch Debouncer Square wave oscillator 5 to 30 Minute Timer NE555 Basic Monostable Mini DDS (Direct Digital Synthesis) Astable Multivibrator High Precision GPS/TV controlled Reference Oscillator TV based Receiver for a Standard Frequency Generator AD9852 DDS schematic A GPS receiver based frequency standard Monostable multivibrator Clock generator 555 Timer Tutorial + Circuits Versatile electronic timer Transmitter Li'l 7 AM Transmitter Schematic Wireless microphone XTAL locked tone transmitter AM oscillator for wireless microphones Wireless microphone 1W CW Transmitter 433MHz transmitter using SAW resonator A 3m (100 MHz) small bug Basic FM Transmitter Micro Power AM Broadcast Transmitter FM Beacon Transmitter (88-108 MHz) 1 valve CW transmitter 250mW HF CW transmitter 2 valve CW transmitter Transmitter using LM317 5 Watt HF CW transmitter Simple FM microphone FM bug High power FM bug 27MHz AM/CW transmitter Easy 2-meter transmitter QRP HF transmitter Spark gap transmitter QRP SSB transmitter Crystal controlled FM transmitter 150mW FM transmitter FM transmitter Two Valve 40m CW Transmitter Frequency agile 80m CW QRP transmitter 80 metre DSB transmitter One Valve CW transmitter Simple Low FER Transmitter 7Mhz AM/CW Amateur Radio Transmitter VHF FM transmitter Simple FM transmitter Wireless microphone Shortwave radio transmitter 175KHz inductive pulse transmitter (PDF) 7MHz QRP transmitter Small Radio Transmitter FM Telephone Transmitter Tracking transmitter 5W PLL Transmitter Miniature FM transmitter Sensitive FM transmitter Simple RF transmitter 1.5 volt tracking transmitter Tracking transmitter Micro Power FM Broadcasting Circuits Low Power FM Transmitter RF/SS Handie Hopper Transmitter Schematic 30-Meter QRP Transmitter for Morse Code Miniature FM Transmitter #1 Miniature FM Transmitter #2 Miniature FM Transmitter #3 Light sensing RF transmitter Micro-Spy with FETs Micro-Spy with USW Micro-Spy with TTL Electronics Basics Radio Terminology - learn the basics, learn what's what! get a basic understanding of all the major terms used in ham radio and electronics Basic Electronic Units - learn the basics of those important components Inductance, Capacitance and Resistance Radio Basics - learn the basics at the necessary level to follow the later advanced topics. Begin to understand LC, reactance, impedance, even Q and other important basic concepts. Includes a great Javascript LC calculator written to work out L or C from resonant frequency! Resistor color code - yes the much sought after color code chart. Component Database Server - Visual Identification of components including utilities to identify component part numbers. Antennas 5/4 Wave 2 Meter Antenna 70cm Collinear Antenna From Coax Home Brew A 4 To 1 Balun Copper pipe dipole antenna construction for 2 Meters Diamond F23 Antenna Defect - Guy Anchors J-pole Antenna Lightning - Porcupine Static Discharger Portable wire antenna Rotator Brake Delay and Protection Circuit Rotator Connector Replacement Tower Tips from N1LO Coax - Some common coaxial cable data Multiband Cubical Quad Hexagonal Beam in 3 hours 80/40m Vertical Cushcraft R5/R7 Maintenance and Repair Antennae for the Low Bands, 80 and 160m A Ball hitch Mobile mount Crank-up Tilt-over Tower Remote Antenna Switching Automatic Band Decoders Troubleshooting Traps Automatic or Manual Band Decoder for 6 to 160 Meters The WINDOM - My Favorite Multi-Band Antenna A six-band, HF Windom antenna NVIS: Near Vertical Incidence Skywave The COPPER CACTUS Antenna Super Linear-Loaded Inverted V The Stacked J-Pole Quickie Vertical 2 Meter Halo 2 Meter PVC Colinear Field Day Emergency 2 Meter Half Wave Colinear 5/8th Wave Stacked J-Pole 2 Meter Half Wave J-Pole Pocket J-Pole Antenna for 2 Meters HF Antenna Designs HF Mobile Antenna Magnetic Loop Antenna - Mag-Loop, Small Transmitting Loop Duplexer (Diplexer) 2m / 70cm Duplexer (Diplexer) HF + 6m / 2m + 70 cm Coax Cable Data Coax Cable Data - (vhf/uhf/shf) Wire Gauge Conversion Table Clear PACTOR - Adapterbox Spider Beam - Tribander yagi for 20/15/10m, made of fiberglass and wire. Multiband Fan Dipole 40 meter Stealth Vertical RF safety calculator Antennas, some rules of thumb for beginners - Every now and then beginners, afraid of making the wrong choice, ask for antenna suggestions. Passive Antenna Re-radiators - Again in response to some considerable interest I have posted some project ideas for receiving difficulties for you to construct passive antenna re-radiators or "sort" of Q multipliers. Active Receiving Antennas - a discussion on some of the principles and justifications behind the design of active receiving antennas for radio projects. Balun design - an electronic tutorial discussing baluns Amplifiers Audio Speech Processor Transistor Audio Amplifiers Home Brew A Condenser Mike IC Audio Amplifiers Amplifier design - Part 1 - learn how to design both a.c. amplifiers and r.f. amplifiers Amplifier design - Part 2 - amplifiers using emitter degeneration Amplifier design - Part 3 - amplifiers using emitter degeneration AND feedback Buffer Amplifier design - to buffer low level stages before succeeding amplification Small Signal Amplifier design - to follow the buffered low level stages before power amplification Double Balanced Mixer design - an electronic tutorial on double balanced mixers Designing Bipolar Transistor Audio PreAmps Designing JFET Transistor Audio PreAmps Designing Op Amp IC Audio PreAmps Filters L.C. Filter design - a comprehensive electronic tutorial for everybody into ham radio or the electronic hobbyist High pass LC filter design - learn how to design high pass LC filters - Part 1 Low pass filter design - the basis of many other filters Band pass filters for many purposes Multi-pole narrow band pass filters I.F. Amplifier filters as designed in the olden days Power Supplies Discrete Component Voltage Regulator 12 Volt Gel Cell Charger 10 Amp, 13.8 Volt Power Supply Beef up Voltage Regulators Rechargable CMOS Battery Adjustable Voltage Regulator Battery Charger in an XT power supply box Trickle Charge Circuit for Deep Cycle Batteries PowerPole - The STANDARD 12 volt connector Astron Power Supply Meter Modifications - analog meters replaced with digital panel meters. A Power Supply Dummy Load - Made from brake lamps Power Supply - 1 - a tutorial on the basics of designing simple power supplies for radio projects. Power Supply - 2 - regulation of power supply voltages. Power Supply - 3 - designing with solid state regulators as well as using higher current regulators. Power Supply - 4 - a bench variable voltage power supply project for you to construct at home. Switching Regulator Basics Using Transistors As Switches RDF RDF2 - 2 Element Sniffer Beam with Tape Measure Elements Tape Measure 3 Element Yagi - RDF Optimized Beam VK3ZPF PROJECTS INDEX 2m Quad Construction Instructions Tape Measure 3 Element Yagi - RDF Optimized Beam RDF2 - 2 Element Sniffer Beam with Tape Measure Elements Passive Attenuator - easy for beginners Active Attenuator - Slightly more complex than the passive attenuator. 555 Time-Difference-Of-Arrival RDF UNIT - Minimum T.D.O.A. Circuit. SIMPLE Time-Difference-Of-Arrival RDF UNIT - A center scale meter shows which way to transmitter. The FOX TIMER - travel alarm used to control 250 milliwatt transmitter. FOXBOX Transmitter Controller THE FOX - two transistor 40 milliwatt fox transmitter THE FOX-750 - three transistor 750 milliwatt fox transmitter Radio Direction Finding Projects Receivers 100Khz Crystal Calibrator Simple Electronic S-Meter Variable Bandwidth CW Filter Radio Receivers - the fundamentals of radio receivers A.M. Radio design - the basics of a.m. radio design Part 1 A.M. Radio design - the basics of a.m. radio design Part 2 F.M. Radio design - the basics of f.m radio design Part 1 F.M. Radio design - the basics of f.m radio design Part 2 A basic old time crystal radio set - basic crystal radio set but includes a lot of design information A reflex radio receiver circuit - out of fashion now but here are the principles, design information and schematics Radio Telescope - In response to some considerable interest I have posted a project for you to construct a 30 Mhz radio telescope. Use LEDs to Replace Bulbs for LCD Backlight Multimode Interface Info Transmitters Basic VOX Circuit PL Tone Encoder Board Improved PL Tone Encoder 40 Meter, 5 Watt QRP Transmitter 80 Meter, 5 Watt CW Transceiver CW Tone Keyer Easy Morse Code Keyer Easy FM Keyer Simple Electronic Keyer Thermal Fan Controller GE Mastr II Mods Design of RF Oscillators - a discussion on some of the principles and justifications behind the RF design and construction of radio frequency oscillators Design of Voltage Controlled Oscillators - a discussion on some of the principles and justifications behind the design of voltage controlled oscillators or VCO's. Design of Crystal Oscillators - a discussion on some of the principles behind the design of crystal oscillators or VXCO's. Test Equipment Field Strength Meter Bird 43 Wattmeter - pages from the manual LC Meter Project and Kit - Now you can easily build a quality inductance and capacitance meter (LC meter project). Ideal for any serious constructor - designed by Neil Hecht of AADE. Square Wave Signal Generator - Build a basic first class electronic hobbyist test instrument - ideal for trouble shooting. Includes a how to use guide. Excellent beginner project to start your collection of amateur-radio-equipment. Links to More Projects ARRL - Antenna Projects AC6V - Amateur Radio and DX Reference Guide VA3AVR - Circuits for the Hobbyist PA0FRI - Technical Homepage for HAMs G1ZCW - Radio Project Pages DL5DBM - Homebrew Page SM0VPO - Harry's Homebrew Homepage Circuits from Radio Bygones & Practical Wireless - The Ingenious Circuits of Sir Douglas Hall Techlib.com - A tecnical library for hobbyist and amateur scientist ARI Versilia - Projects and Information PA0CMU - Carel's QRP & Homebrew Page - (Tnx, Carel) W4ZT - Tony's Homebrew Page N1HFX - RASON Project Page