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 Wednesday, May 31, 2023	AC Motor Speed Controller	20
	12VDC To 120VAC Inverter	18
Yesterday Tuesday, May 30, 2023	FM Transmitter	31
	Video Stabilizer/MacroVision Removal	27
Of All Time	12VDC To 120VAC Inverter	1,515,438
	FM Transmitter	1,001,539

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		224,864		61	*
Car Alarm Arming Horn Beep Canceller	bob	134,712		6	*
Wireless Auto Tachometer		340,585		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	158,204		29	*
Parallel (Printer) Port Interface		282,600		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		444,764		63	*
3 Channel Spectrum Analyzer		218,860		20
40W Fluorescent Lamp Inverter	Bart Milnes	327,879		60	*
Adjustable Strobe Light		306,239		36
Black Light		276,374		29
Colour (Sound) Organ		287,813		36
Electronic Dice NEW!		186,789		10	*
Fantastic Atom Expander		201,077		25
Flash Slave Trigger		219,090		18	*
Infa-Red Remote Control		631,209		216	*
IR Remote Extender NEW!		130,143		2	*
IR Remote Jammer	Carl	262,804		110	*
IR Remote Switch NEW!		155,659		9	*
LASER Transmitter/Receiver		411,981		92
LED Chaser		443,023		83	*
LED Metronome NEW!		97,516		3	*
LED Thermometer		204,759		22	*
Light/Dark Detector		304,056		90	*
Simple Colour Organ		135,850		11	*
Strobe Light		273,168		27	*
TRIAC Light Dimmer		548,683		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		356,832		122	*
Electromagnetic Levitator NEW!		142,257		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		918,780		214	*
AC Motor Speed Controller		386,343		29	*
Air Flow Detector		249,675		54	*
Digital Keypad Combination Lock		194,735		20
Low Voltage Alarm		227,128		58	*
Pine Racecar Victory Judge		101,233		1	*
Pulse Width Modulation DC Motor Control		645,585		94
Rain Detector		302,490		112	*
Simple Lie Detector		561,093		323
Simple Polarity Tester	Dudley LeRoux	163,350		13	*
Simple Servo Controller		219,178		22	*
Simple Touch Switch NEW!		167,555		6	*
Simple Two Speed Contactor DC Motor Controller		202,739		21	*
Stepper Motor Controller		741,462		120	*
Time Delay Relay		552,849		88
Time Delay Relay II	jawaharlal@excite.com	244,103		39	*
Touch Switch		287,415		51	*
Video Activated Relay		119,993		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	178,295		10	*
Water Detector With Sump/Bilge Pump Controller		150,842		18	*
Wire Loop Alarm	Alex Meaden	203,878		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		311,158		25	*
12VDC To 120VAC Inverter		1,515,438		691
6V to 12V Converter		523,186		121
Automatic 12V Lead Acid Battery Charger		933,053		248
Automatic Load Sensing Power Switch		165,057		16	*
Car Battery Charger		879,745		159	*
Dual Polarity Power Supply		368,360		84	*
Fixed Voltage Power Supply		308,668		52	*
High Current Power Supply		334,771		66	*
High Voltage High Current Power Supply		250,440		35	*
LASER Power Supply		293,196		28
Portable CD Player Adapter For Car		210,096		12	*
Power Supply		734,619		259	*
Solid State Tesla Coil NEW!		143,309		4
Solid State Tesla Coil/High Voltage Generator		439,857		51
Transformerless Power Supply		460,304		117	*
Voltage Inverter		334,874		51	*
Voltage Inverter II		199,873		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		582,475		182
3 Watt FM Transmitter	Rae XL Tkacik	331,369		83	*
50 Watt Amplifier		504,448		74
8 Note Tune Player		138,972		12	*
8 Watt Audio Amp		369,144		67	*
Aircraft Radio Communications Receiver		274,755		49	*
Crystal Radio		156,708		53	*
Digital Volume Control		335,703		47	*
Electronic Stethoscope		312,302		142	*
FET Audio Mixer		340,658		41
FM Transmitter		1,001,539		420
Guitar Fuzz Effect		244,097		54	*
Microphone Mixer	Anatoly I. Shikhatov	248,049		26	*
Mono To Stereo Synthesizer	oRbEq	131,165		18	*
One Tube Regenerative Radio NEW!		136,177		4	*
Op Amp Radio		384,323		80	*
Single Chip AM Radio NEW!		97,625		3	*
Single Chip FM Radio NEW!		169,364		1	*
Sound Level Meter		339,215		51	*
Stereo Tube Amplifier	Weslee Kinsler	265,688		15	*
Tone Control		307,263		31
Transistor Organ		196,668		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		161,955		27	*
FM Telephone Bug		233,870		57
Phone Busy Indicator		212,380		24	*
Remote Telephone Ringer		116,732		3	*
Ringing Phone Light Flasher		214,784		35	*
Simple Phone Tap	Derek Tombrello	381,620		98	*
Telephone Hold Button		127,342		10
Telephone Recorder		214,761		55	*

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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.