Electronic Circuits

Here are some neat circuits you might want to try. The schematics and printed circuit board patterns are GIF's, and may show up different on some browsers. You might want to save the images (especially the PC board patterns) to your hard drive, load them into a photo editor (Photoshop, Paint Shop Pro, The GIMP, etc.) and adjust the size before you transfer the pattern to a board. Printed circuit board patterns are available possible. This page is always under construction and there will be new additions from time to time. Some of these circuits were designed by me, most are not. Whenever possible I have tried to credit the author of a circuit but since many of these circuits are from my personal collection that I have gathered over a period of many years, this information is not always available.

You can rank circuits according to how much you like a circuit by clicking on the lightning bolt icons. These ranks can be based on how much you like a circuit, whether a circuit worked or didn't work for you, or how useful you found a circuit. Additionally you can add your own comments at the bottom of each circuit by filling out the form.

Circuit Catagories

Circuits are divided into categories as listed below.

Catagory	Circuits
Auto	3
Computer	2
Light/Laser	21
Major Projects	2
Other	21
Power Supply	18
Sound/Radio	22
Telephone	8

Some circuits in this list have little astrisk (*) markers beside them which give a basic amount of information regarding whether the circuit has been designed, tested or modified by the webmaster.

Marker	Description
*	The circuit has not been tested by me. Therefore, I will offer no gaurantee that they will work.
*	This circuit has been designed by me.
*	This circuit was not designed by me, but was modified by me.

Most Popular Circuits

The most popular circuits of today, yesterday and all time can be found below.

When	Circuit	Views
Today Saturday, November 26, 2022	Car Battery Charger	18
	12VDC To 120VAC Inverter	17
Yesterday Friday, November 25, 2022	12VDC To 120VAC Inverter	42
	Stepper Motor Controller	33
Of All Time	12VDC To 120VAC Inverter	1,508,177
	FM Transmitter	996,370

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		223,260		61	*
Car Alarm Arming Horn Beep Canceller	bob	133,196		6	*
Wireless Auto Tachometer		338,453		58

Computer

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computer Controlled Frequency Counter/Logic Probe	Richard van Wyk	156,764		29	*
Parallel (Printer) Port Interface		280,336		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		442,241		63	*
3 Channel Spectrum Analyzer		216,838		20
40W Fluorescent Lamp Inverter	Bart Milnes	325,994		60	*
Adjustable Strobe Light		303,958		36
Black Light		273,119		29
Colour (Sound) Organ		285,531		36
Electronic Dice NEW!		184,890		10	*
Fantastic Atom Expander		199,445		25
Flash Slave Trigger		216,450		18	*
Infa-Red Remote Control		629,030		216	*
IR Remote Extender NEW!		128,129		2	*
IR Remote Jammer	Carl	260,671		110	*
IR Remote Switch NEW!		154,052		9	*
LASER Transmitter/Receiver		408,804		92
LED Chaser		440,161		83	*
LED Metronome NEW!		96,316		3	*
LED Thermometer		203,252		22	*
Light/Dark Detector		302,571		90	*
Simple Colour Organ		134,397		11	*
Strobe Light		271,569		27	*
TRIAC Light Dimmer		546,038		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		354,834		122	*
Electromagnetic Levitator NEW!		140,544		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		916,022		214	*
AC Motor Speed Controller		383,376		29	*
Air Flow Detector		247,994		54	*
Digital Keypad Combination Lock		193,202		20
Low Voltage Alarm		225,492		58	*
Pine Racecar Victory Judge		99,973		1	*
Pulse Width Modulation DC Motor Control		643,524		94
Rain Detector		300,872		112	*
Simple Lie Detector		555,904		323
Simple Polarity Tester	Dudley LeRoux	161,590		13	*
Simple Servo Controller		217,383		22	*
Simple Touch Switch NEW!		165,944		5	*
Simple Two Speed Contactor DC Motor Controller		201,124		21	*
Stepper Motor Controller		738,614		120	*
Time Delay Relay		550,896		88
Time Delay Relay II	jawaharlal@excite.com	241,695		39	*
Touch Switch		285,608		51	*
Video Activated Relay		118,476		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	176,240		10	*
Water Detector With Sump/Bilge Pump Controller		149,257		18	*
Wire Loop Alarm	Alex Meaden	202,300		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		308,532		25	*
12VDC To 120VAC Inverter		1,508,177		691
6V to 12V Converter		520,532		121
Automatic 12V Lead Acid Battery Charger		929,834		248
Automatic Load Sensing Power Switch		163,297		16	*
Car Battery Charger		876,544		159	*
Dual Polarity Power Supply		366,318		84	*
Fixed Voltage Power Supply		306,533		52	*
High Current Power Supply		332,308		66	*
High Voltage High Current Power Supply		248,523		35	*
LASER Power Supply		290,894		28
Portable CD Player Adapter For Car		208,248		12	*
Power Supply		731,781		259	*
Solid State Tesla Coil NEW!		141,425		4
Solid State Tesla Coil/High Voltage Generator		437,275		51
Transformerless Power Supply		458,196		117	*
Voltage Inverter		332,621		51	*
Voltage Inverter II		197,796		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		580,363		182
3 Watt FM Transmitter	Rae XL Tkacik	328,932		83	*
50 Watt Amplifier		501,981		74
8 Note Tune Player		137,491		12	*
8 Watt Audio Amp		366,787		67	*
Aircraft Radio Communications Receiver		272,343		49	*
Crystal Radio		155,092		53	*
Digital Volume Control		330,474		47	*
Electronic Stethoscope		309,500		142	*
FET Audio Mixer		338,445		41
FM Transmitter		996,370		420
Guitar Fuzz Effect		241,849		54	*
Microphone Mixer	Anatoly I. Shikhatov	246,135		26	*
Mono To Stereo Synthesizer	oRbEq	129,332		18	*
One Tube Regenerative Radio NEW!		133,191		4	*
Op Amp Radio		381,441		80	*
Single Chip AM Radio NEW!		96,221		2	*
Single Chip FM Radio NEW!		166,998		1	*
Sound Level Meter		337,013		51	*
Stereo Tube Amplifier	Weslee Kinsler	263,665		15	*
Tone Control		305,072		31
Transistor Organ		194,586		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		160,549		27	*
FM Telephone Bug		232,480		57
Phone Busy Indicator		210,851		24	*
Remote Telephone Ringer		115,400		3	*
Ringing Phone Light Flasher		212,397		35	*
Simple Phone Tap	Derek Tombrello	380,120		98	*
Telephone Hold Button		125,775		10
Telephone Recorder		213,173		54	*

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All material marked as mine is property of Aaron Cake. You may, however, distribute it as much as you want, with or without credit to me. Just don't claim credit for it yourself, and it would be nice if you included a link back to my page. All other material is property of its authors.