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 Tuesday, May 17, 2022	AC Motor Speed Controller	9
	Stereo Tube Amplifier	9
Yesterday Monday, May 16, 2022	12VDC To 120VAC Inverter	37
	Stepper Motor Controller	34
Of All Time	12VDC To 120VAC Inverter	1,501,036
	FM Transmitter	991,429

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		221,200		61	*
Car Alarm Arming Horn Beep Canceller	bob	131,408		6	*
Wireless Auto Tachometer		336,164		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	154,977		29	*
Parallel (Printer) Port Interface		277,641		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		439,616		63	*
3 Channel Spectrum Analyzer		214,486		20
40W Fluorescent Lamp Inverter	Bart Milnes	323,835		60	*
Adjustable Strobe Light		301,383		36
Black Light		269,370		29
Colour (Sound) Organ		283,035		36
Electronic Dice NEW!		182,870		10	*
Fantastic Atom Expander		197,506		25
Flash Slave Trigger		214,272		18	*
Infa-Red Remote Control		626,255		216	*
IR Remote Extender NEW!		125,993		2	*
IR Remote Jammer	Carl	258,172		110	*
IR Remote Switch NEW!		152,381		9	*
LASER Transmitter/Receiver		405,263		92
LED Chaser		437,698		83	*
LED Metronome NEW!		94,684		3	*
LED Thermometer		201,385		22	*
Light/Dark Detector		300,684		90	*
Simple Colour Organ		132,727		10	*
Strobe Light		268,937		27	*
TRIAC Light Dimmer		543,116		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		352,686		122	*
Electromagnetic Levitator NEW!		138,659		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		913,032		214	*
AC Motor Speed Controller		380,007		29	*
Air Flow Detector		246,011		54	*
Digital Keypad Combination Lock		191,288		20
Low Voltage Alarm		223,464		58	*
Pine Racecar Victory Judge		98,344		1	*
Pulse Width Modulation DC Motor Control		641,134		94
Rain Detector		298,906		112	*
Simple Lie Detector		553,547		323
Simple Polarity Tester	Dudley LeRoux	159,695		13	*
Simple Servo Controller		215,371		22	*
Simple Touch Switch NEW!		163,927		5	*
Simple Two Speed Contactor DC Motor Controller		199,236		21	*
Stepper Motor Controller		735,095		120	*
Time Delay Relay		548,733		88
Time Delay Relay II	jawaharlal@excite.com	239,210		39	*
Touch Switch		283,647		51	*
Video Activated Relay		116,684		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	174,091		10	*
Water Detector With Sump/Bilge Pump Controller		147,296		18	*
Wire Loop Alarm	Alex Meaden	200,427		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		305,990		25	*
12VDC To 120VAC Inverter		1,501,036		689
6V to 12V Converter		517,524		121
Automatic 12V Lead Acid Battery Charger		925,937		248
Automatic Load Sensing Power Switch		161,140		16	*
Car Battery Charger		873,204		159	*
Dual Polarity Power Supply		363,748		84	*
Fixed Voltage Power Supply		304,106		52	*
High Current Power Supply		329,444		66	*
High Voltage High Current Power Supply		246,518		35	*
LASER Power Supply		288,260		28
Portable CD Player Adapter For Car		205,932		12	*
Power Supply		729,024		259	*
Solid State Tesla Coil NEW!		139,121		4
Solid State Tesla Coil/High Voltage Generator		433,850		51
Transformerless Power Supply		455,836		117	*
Voltage Inverter		330,078		51	*
Voltage Inverter II		195,496		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		577,937		182
3 Watt FM Transmitter	Rae XL Tkacik	326,403		83	*
50 Watt Amplifier		499,425		74
8 Note Tune Player		135,816		12	*
8 Watt Audio Amp		364,293		67	*
Aircraft Radio Communications Receiver		269,337		49	*
Crystal Radio		153,748		53	*
Digital Volume Control		325,975		47	*
Electronic Stethoscope		306,839		142	*
FET Audio Mixer		336,126		41
FM Transmitter		991,429		420
Guitar Fuzz Effect		239,208		54	*
Microphone Mixer	Anatoly I. Shikhatov	243,953		26	*
Mono To Stereo Synthesizer	oRbEq	127,061		18	*
One Tube Regenerative Radio NEW!		129,829		4	*
Op Amp Radio		378,493		80	*
Single Chip AM Radio NEW!		94,566		2	*
Single Chip FM Radio NEW!		164,786		1	*
Sound Level Meter		334,573		51	*
Stereo Tube Amplifier	Weslee Kinsler	261,398		15	*
Tone Control		302,517		31
Transistor Organ		192,404		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		158,729		27	*
FM Telephone Bug		230,838		57
Phone Busy Indicator		208,920		24	*
Remote Telephone Ringer		113,736		3	*
Ringing Phone Light Flasher		209,892		35	*
Simple Phone Tap	Derek Tombrello	378,315		98	*
Telephone Hold Button		123,829		10
Telephone Recorder		211,242		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.