• 2304 Tech List -Many radio atenna building project documents on-line. Pages have also many radio equipment plans on-line.
• 4QD Electronics Circuits Reference Archive -4QD's pages of interesting circuits with wide selection of small circuits useful as building blocks for electronic systems
• Aaron's Electronic Circuits - light, laser, sound, radio, PSU, car
• Alfred73 Electronics - SMT Desoldering Station, Infrared Receiver, line in use, VGA to TV, power supply
• Amateurfunk- und Elektronik-Projekte - amateur radio electronics project in German
• Amazon Electronics Free Circuits - audio, computers, controllers, testers, light effects, microcontrollers, power supplies, radio, security, timers, circuit can be also bought as complete kits from
• Ampage - guitar effects and music electronics
• Analog Devices Application Notes Libraty - information and circuits on A/D-converters, D/A-converters, accelerometers, DSP, analof audio, digital audio, measurements, communication, motor control, signal processing, oscillators, amplifiers, RF, temperature and signal conversion
• Analog Music Zone Guitar Effects Schematics - guitar effects, compressors, microphones and effects
• Andrew Buckin Projects - VGA generator, SVGA generator, IDE2LPT, CPLD projects
• Applications of neon glow lamps - some applications of neon glow lamps
• Aquarium Related Electronics - pH meters, thermometers
• Aren's Attic: How to build your own audio equipment - loudspeakers, solid-state amplifiers and tube amplifiers
• Audio Electronics Page - amplifiers, preamplifiers, power supplies
• Batronix.com - electronic circuits, information, software and datasheets to download for electronics hobbyists, programmers for EPROMs and microcontrollers
• Bebec Electronic kytkinkaavat - dozen different hobby circuits, site in Finnish but most circuits can be understood by viewing just pictures
• Bebek Electronic rakennussarjat - five different hobby circuits, site in Finnish but most circuits can be understood by viewing just pictures
• Beyond Logic - PC interfacing projects
• Body Build Articles - Here are some hardwere interfacign articles published in Micro User or Acorn Computing from from March 83 to March 95.
• Bowden's Hobby Circuits - collection of electronic circuits for the hobbyist or student
• Brainstorming page - electronics hobby circuits, page is in German but you can try to access it using
• Burning Flux - musical instruments and audio/video projects
• Byunghwan's Hobby Circuits - This is a collection of electronic circuits for the hobbyist or student. Site includes 80 circuit diagrams, links to related sites, commercial kits and projects, newsgroups and educational areas. Most circuits shown here can be built with common components available from Radio Shack or salvaged from scrap electronic equipment.
• Circuit Central - This library currently contains 285 circuits in 15 categories.
• Circuit Exchange International - schematics on radio and electronics, circuit analysis, circuit theory and electronic design
• Circuits from Forrest Cook - NiCD charger, radio, audio, microprocessor
• Circuits for the Hobbyist - many quite simple circuits
• Circuit Lab - lots of different circuits from
• Circuits Online - Dutch electronics site with circuits, forum, datasheets, links, downloads, articles, info, newsletter, etc.
• Classic and Vintage Audio Circuits Page - some audio equipment circuits and links
• CommLinx Solutions circuit links - Links to hundreds of circuit schematics available on the Web formatted onto a single convenient page
• Computer Hardware Projects - computer oscilloscope and car MP3 project
• Cool Schematics - solid state and tube guitar amplifier circuits
• CyberCircuit Circuit Archive - many different circuit ideas
• CXI Schematics - alarm, security, control, interfacing, music effects, radio, power supplies, switching, test gear
• Dan Fraser's Electronic Info & Schematic Page - audio circuits, monitor repair
• Diana's Electronics Info Page - simple amplifiers, solid state oscilloscope, stepper motor projects, led circuits
• DIBs Circats - Schematics of simple circuits in GIF and PDF format: audio circuits, power supply, logic and microprocessor
• Die Xedox Elektronikseiten - some electronics project, text in German
• Discover Circuits - a collection of schematics quick solutions for electronic engineering problems compiled by David A. Johnson
• DIY Audio Amplifier Page - audio power amplifiers
• Dr Bob's Electronic Projects - amplifier circuits, chargers, flashers, meters, motor, oscillator and power supply
• EDN Archives - contains past issues of EDN magazies which contain design ideas and other circuits
• EDN's Design Ideas Archives - circuit archive which you can access with search engine
• Effect Rack Unit - contains very many guitar effect unit circuit diagrams
• Effectronics Schematics - audio processing and effect circuits
• Eldoraado Eksoottista Elektroniikkaa - LED circuits, PIC programmer, texts in Finnish
• ELEC.de - large circuit page, text in German, you can use
• Electronic Design Ideas For Design - many circuit ideas published in the magazine
• Electronics tutorial radio design site - VK2TIP Ian Purdie's electronics tutorial radio design pages for amateur, ham radio, electronic project enthusiasts as well as for the electronic hobbyist and for home learning to design your own electronic projects.
• Electronics 2000 - tens of different circuits to download
• Electronics 2000 Circuit Lab - many different electronics circuits on two alternative laguages
• Electronics 2000 Projects with circuit board, theoritical diagramm and description - many different electronics circuits on two alternative laguages
• Electronics and schematics - some PC parallel port and RC servo circuits
• Electronics Infoline - electronics circuits portal
• Electronic Circuit Beans Collection - small circuit useful as building blocks, oscillators, power supplies
• Electronic Cookbook Archive - place for electronics enthisiasts to share circuit ideas with others
• Electronic Projects Online - contains 25 of the most popular magazine projects designed by Paul Stenning for various electronics magazines between 1993 and 1997
• Electronic Projects Online - contains 25 of the most popular magazine projects designed by Paul Stenning for various electronics magazines between 1993 and 1997
• Electronics 2000 Project Pages - projects with circuit board, theoritical diagramm and description, many circuit from Smartkit electornics kits
• Electronics and Radio Section - radio, tube audio, tesla, software
• Electronics circuit designed by Tomi Engdahl - audio, video, computers, telephone, light effects, measuring, power supplies, electronics documents
• Electronics circuits / do-it-yourself homepage - this site contains thousands of electronics circuits & do-it-yourself circuits relating to a wide range of categories like audio,music,home/garden related,computer hardware,radio,robotics etc.
• Electronic Circuits for the Hobbyist - simple circuits, radio, flasher, amplifier
• Electronics for You Circuit Lab - circuits and short articles describing them
• Electronic Circuits for the Hobbyist - lots of different simple circuits for different applications
• Electronics Projects by Paul Taylor - some simple electronics projects
• Electrical circuits for model railroad hobbyists - light flashers, constant light, power supplies
• Electrical Engineering Circuits Archive - lots of small circuits, ideas and datasheets
• Electronic Design Ideas For Design - many useful circuit ideas
• Electronique Sch้math่que - different circuit sections on many areas, text in French
• Electro Tech Projects - simple projects like transmitters, lie detector, battery charger, DTMF, flashers, strobe and TV remote blocker
• Elektroniikan harjoitust๖itไ - simple electronics circuits, instructions in Finnish
• ElectronicsZone - tons of free electronic circuits arranged into different categories
• Electronics Zone - This site contains lots of circuit diagrams & do-it-yourself circuits for hobbyists, students,professionals etc. relating to a wide range of categories like audio, music,home/garden related,computer hardware,radio,robotics etc to name a few.
• Elektroniikkaprojekteja - 50x7 LED display, PIC programmer, LED circuits, stroboscope, text in Finnish
• ESP Audio Projects - power amplifiers, power supplies, crossovers, miscial instrument circuits, mixers,
• FC's Electronic Circuits - solar power circuits, FM broadcasting, NiCd charger and other circuits
• Elektror Electronics Mini Project series - This circuit series is designed with the novice or younger reader in mind. The projects described will have an emphasis on low build cost and simplicity.
• FC's Solar Circuits
http://ftp.unina.it/pub/electronics/ftp.armory.com/ - microcontroller information and circuits
Gateway Projects and Technical Practical aspects of amateur radio - This web page provides several articles to read and projects to build.
• George Krilov audio schematics page - page is about transistor audio power amplifiers, contains articles about power amplifiers shematics, design, construction and SPICE simulation, page is partially in English and partially in Russian
• GEO's Effect Schematics - collection of vintage and new-design effects and musical related DIY
• Glolab Free Schematic Diagrams - wireless circuits, motion detector, encoder, decoder, PIR, RF, telephone, video
• Gonz Projects - power supplies, automation, signal generators, frequency meter, text in French
• Guitar Effects Boxes - guitar effect schematics and articles
• Guitar Effects Boxes - guitar effect schematics and articles
• Guitar-related Circuits - effect circuit collection
• HAM radio circuits at nic.funet.fi - some circuit for radio amateurs
• Hardware Web - software, links and midi circuits
• Harry's Homebrew Homepage - very many radio related projects
Harry's Homebrew Homepage by Harry Lythall SM0VPO/G4VVJ
• HeadWize Projects - many headphone amplifiers and related circuits
• Hobby Projects to Build - metal detector, speaker microphone,
• Electronic projects by Roberto Barrios - HAM radio programming cables, Luxman I Bus Interface, SPDIF adapter, serial port power booster, radio interface box
• Homebrew Test equipment - test equipment built by experimenters and amateur radio enthusiasts
Homebrew Test Equipment and Software - several projects which will allow you to build your own RF design test equipment
• Ideaport - electronics circuit for school projects, text in Finnish
• IECMaster Circuits - Circuits for audio, music, power supply, RF, video, telephone, measurement and alarm applications.
• Imagineering On-Line Magazine Hobby Circuits - wide variety of circuits, tens of circuits
• JF1OZL QRP Hand Made Radio - very many amateur radio links
• Kelly Kohls, N5TLE Homepage - DMX 512 Light control circuits
• Kobra Electronic Free Schematic Page - 300 free circuit diagrams
• Kytkentไkaavoja - Some electronics circuits in Finnish.
• Laurier's Handy Dandy Little Circuits - site for electronic hobbyists, includes all kins of small electronics hobby circuits
• Laurier's Handy Dandy Little Circuit Projects - site for electronic hobbyists, includes all kins of small electronics hobby circuits
• Library of circuits - This library currently contains 285 circuits in 15 categories. Each circuit comes complete with a list of parts, and a datasheet for each IC, Diode, and Transistor (as available).
• Linear Electronics Troubleshooter- contais lots of circuits from power supplies and pulse generators to PLC laddler logic controlling
• Lista rakennussarjoista - many electronics kit projects in Finnish
• Manic Hand Builder - Pure amateur hand builders webpage for HAM. Designing PCB mask pattern by MS-paint, make own UV-sensitive thin-filmed PCB from junk PCB. Build DDS VFO controled by PIC16F84. Build ARDF receiver, using PLL LO, controlled with PIC.
• Maxwell electronica - Electronic circuits and tutorials in Spanish.
• Microchip Net resources - PIC project link list
• Model Railroad Electronic Circuit List - Many simple electronics circuits not show in a schematic drawing but using simple wiring drawings.
• Music Electronics ตArchive - music circuits and audio electronics information
• Music Machines do-it-yourself/schematics - music electronics circuits and electronic musical instruments
• Mycal's Micro Radio Page - radio transmitters, antennas and amplifiers
• Nathan's Audio And Electronic Webpage - audio circuits
• Nick's Circuits collection - infrared, telephone, sound, smartcard, filters
• North Country Radio Kit Schematics - only circuit diagrams of RF kits with no component values shown
• Ozitronics Audio Amplifiers & Voice Recorders - kit catalogue which includes full circuit diagrams
• Packet BBS NL3ASD Amsterdam - schematic section contains lots of HAM related circuits
• PC Elektroniikkaa - Simple circuits which connect to PC and PC port information. Text in this site is in Finnish.
• Peter's Electronics Playground - stepper motor driver, data acquisition with A/D converter, onnecting via parallel port, LCD interfacing, PIC measurement device with LCD and A/D
• Peter Parker's Project Page - A collection of homebrew projects for the amateur radio enthusiast. A few projects include full constructional articles, but most have just schematic diagrams and a few notes.
• PI6ATV software and circuits - amateur TV related circuits and software, radio, video
• PIC16C505 Related Information - Application notes.
• PIC16C54A Related Information - Application notes.
• PIC / Ubicom Dev'rs - communication circuits using PIC, encryption, interfacing, Internet applications using PIC and many other PIC circuit
• Pro Audio Equipment Schematics Page - Alan Garren's excellent listing of vintage gear schematics including API, UREI, Altec, RCA and more
• Programmers Heaven Amiga Hacks and Projects - Amiga circuits
• Prolectron Electronics Schematics - electret microphone circuits, opamp circuits and simple transistor circuits
• Randy Linscott Projects of the Month - many interresting projects
• RED Free Circuit Design - amplifiers, measuring equipments, health circuits, hobby model circuits, music circuits
• Richard Steven Walz's Electronics Circuits FTP site - over 900 electronics ascii files
• Robin Tomtlund-The Electronic Page - guitar effect circuits
• Rollins World Wide Web Circuits - simple electrical circuits for beginners
• Russian Electronic - circuits in many categories, many texts in Russian but some in English
• S51KQ hardware & software - ATV, antenna, video circuits, PLL, LANC, DV, paging, FM broadcasting
• Sam Electronic Circuits - Electronic Circuits for the Hobbyist. Audio and digital, useful circuits with full description and diagrams. Text in English and Greek.
• Saint Audio Do It Yourself Zone - small circuits, speakes, hifi circuits, tybe amplifiers, DIY cables
• Salvio Klaic's electroni section - tranformers, IC testers
• Sam's Schematic Collection - various schematics and diagrams
• Schematics Depot at Reconn's World - power electronics, audio, IR, ultrasonics, transmitters, telephone, LED
• Schematics FM transmitters - collection of FM transmitter circuits
• Science & Technology of high voltage generators - A page on high voltage multipliers, a circuit on driving flybacks (with a large capacitor as protection) and power supplies
• SDS Labs Schematics - hifi circuits, tube amplifiers, audio DACs
• Selfmade hardware for Amiga - This page is a collection of hacks/projects by people who use Commodore Amiga computers.
• Simple Circuit - lots of circuits in many categories
• Simple test equipment to build - field strength meter, crystal tester and capacitance meter
• Snock's High Voltage Page - detailed explanation on flyback, ignition coil circuits and pictures of various transformers
• SP-Elektroniikka kytkennไt 1 - light controlling, amplifiers, meters and remote controllers, text in Finnish, circuti board design available for most of projects
• SP-Elektroniikka kytkennไt 2 - light controlling, amplifiers, meters and remote controllers, text in Finnish, circuti board design available for most of projects
• Stefan's Electric R/C Web Site - This site is a source of information, projects, and software related to electric powered radio controlled model aircraft.
• Synthfool Lite Schematics - many musical instrument and effect circuit diagrams
• Switching Circuits - collection of switching circuits for temperature, light level and button controlled switching
• Technick.net Circuits Collection - infra red, telephone, sound, smartcard, PIC, power supply, filters
• The Electric Wave Circuits 1 - selection of various hobby circuits like flashers, oscillators, power monitor and electric field detector
• The Electric Wave Circuits 2 - selection of various hobby circuits like noise generator, loop aerial, zero crossing AC switch oscillator, high voltage generator, geomagnetic detector, infrared transmitter and receiver
• The Electric Wave Circuits 3 - selection of various hobby circuits like baluns, flashers, timers, mains frequency meter, electronic relay
• The Electronic Resource - IO interfacing via ISA card or parallel port, single board computers, robotics
• The Guitar Effects Oriented Web Page - FAQs and circuit diagrams
• The Nexus Project - Video conversion and Macrovision removing circuits.
• Tjaco's design graveyard - HIFI, EPROM, IR remote, tesla coil, high voltage, telephone, dimmer, timer
• Tronnort Technology Electronics Projects - video, storage oscilloscope, frequency counter, logic analyzer, EPROM programmers, RS.485 multiplexer
• USB Code Examples for PIC - PIC16C745/765 code for Jan Axelson's VB demo, USB Descriptor Wizard, HIDComm ActiveX Control, PS/2 to USB Mouse, PS/2 to USB Keyboard, Gameport to USB Gamepad
• VK2TIP Ian Purdie's radio design tutorial pages - for amateur, ham radio, electronic project enthusiasts as well as the electronic hobbyist
• Techmind.org - Techmind.org a site devoted to sharing my enthusiasm and knowledge of various aspects of science and technology. This site has circuits and projects on using soundcard as measurement device, homebrew video hardware, ADC, RS-232 and science experiments.
• WebEE Schematics Page - large collection of circuits, mirrored to www.epanorama.net from
• WE-MAN's Electro stuff - many circuits and documents
• Wenzel Associates Technical Library - application notes and circuits
• Wenzel Associates Circuit Notebook - for Engineers and Hobbyists
• World Of Electronics - electronics projects in German, electronics display projects
• Xexorz Schematics - radiation meter, radio circuits, IR circuits, light circuits
