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 Sunday, September 19, 2021	12VDC Fluorescent Lamp Driver	13
	Solid State Tesla Coil/High Voltage Generator	12
Yesterday Saturday, September 18, 2021	FM Transmitter	31
	Voltage Inverter	26
Of All Time	12VDC To 120VAC Inverter	1,491,506
	FM Transmitter	982,327

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		218,293		61	*
Car Alarm Arming Horn Beep Canceller	bob	128,942		6	*
Wireless Auto Tachometer		332,604		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	152,682		29	*
Parallel (Printer) Port Interface		273,786		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		435,421		63	*
3 Channel Spectrum Analyzer		211,289		20
40W Fluorescent Lamp Inverter	Bart Milnes	320,748		60	*
Adjustable Strobe Light		297,582		36
Black Light		264,412		29
Colour (Sound) Organ		279,576		36
Electronic Dice NEW!		179,974		10	*
Fantastic Atom Expander		193,702		25
Flash Slave Trigger		210,985		18	*
Infa-Red Remote Control		622,386		216	*
IR Remote Extender NEW!		122,821		2	*
IR Remote Jammer	Carl	253,488		110	*
IR Remote Switch NEW!		149,853		9	*
LASER Transmitter/Receiver		400,618		92
LED Chaser		434,017		83	*
LED Metronome NEW!		92,924		3	*
LED Thermometer		198,879		22	*
Light/Dark Detector		297,753		90	*
Simple Colour Organ		130,440		10	*
Strobe Light		265,828		27	*
TRIAC Light Dimmer		539,794		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		349,399		122	*
Electromagnetic Levitator NEW!		136,047		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		908,296		214	*
AC Motor Speed Controller		375,431		29	*
Air Flow Detector		243,282		54	*
Digital Keypad Combination Lock		188,552		20
Low Voltage Alarm		218,825		58	*
Pine Racecar Victory Judge		96,153		1	*
Pulse Width Modulation DC Motor Control		637,606		94
Rain Detector		295,968		112	*
Simple Lie Detector		550,250		323
Simple Polarity Tester	Dudley LeRoux	156,842		13	*
Simple Servo Controller		211,975		22	*
Simple Touch Switch NEW!		161,143		5	*
Simple Two Speed Contactor DC Motor Controller		196,488		21	*
Stepper Motor Controller		729,718		120	*
Time Delay Relay		545,646		88
Time Delay Relay II	jawaharlal@excite.com	235,653		39	*
Touch Switch		280,559		51	*
Video Activated Relay		114,266		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	171,193		10	*
Water Detector With Sump/Bilge Pump Controller		144,555		18	*
Wire Loop Alarm	Alex Meaden	197,746		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		302,441		25	*
12VDC To 120VAC Inverter		1,491,506		689
6V to 12V Converter		512,561		121
Automatic 12V Lead Acid Battery Charger		919,683		248
Automatic Load Sensing Power Switch		157,799		16	*
Car Battery Charger		868,764		159	*
Dual Polarity Power Supply		360,600		84	*
Fixed Voltage Power Supply		300,776		52	*
High Current Power Supply		325,829		66	*
High Voltage High Current Power Supply		243,592		35	*
LASER Power Supply		284,798		28
Portable CD Player Adapter For Car		202,910		12	*
Power Supply		725,215		259	*
Solid State Tesla Coil NEW!		136,220		4
Solid State Tesla Coil/High Voltage Generator		429,299		50
Transformerless Power Supply		452,204		117	*
Voltage Inverter		325,262		51	*
Voltage Inverter II		192,507		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		574,397		182
3 Watt FM Transmitter	Rae XL Tkacik	322,698		83	*
50 Watt Amplifier		495,816		74
8 Note Tune Player		133,441		12	*
8 Watt Audio Amp		360,381		67	*
Aircraft Radio Communications Receiver		265,779		49	*
Crystal Radio		151,760		53	*
Digital Volume Control		322,552		47	*
Electronic Stethoscope		302,948		142	*
FET Audio Mixer		332,442		41
FM Transmitter		982,327		420
Guitar Fuzz Effect		235,545		54	*
Microphone Mixer	Anatoly I. Shikhatov	240,987		26	*
Mono To Stereo Synthesizer	oRbEq	124,026		18	*
One Tube Regenerative Radio NEW!		125,952		4	*
Op Amp Radio		374,306		80	*
Single Chip AM Radio NEW!		92,502		2	*
Single Chip FM Radio NEW!		161,696		1	*
Sound Level Meter		331,309		51	*
Stereo Tube Amplifier	Weslee Kinsler	258,400		15	*
Tone Control		298,176		31
Transistor Organ		189,150		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		156,158		27	*
FM Telephone Bug		228,267		57
Phone Busy Indicator		206,215		24	*
Remote Telephone Ringer		111,410		3	*
Ringing Phone Light Flasher		206,127		35	*
Simple Phone Tap	Derek Tombrello	375,594		98	*
Telephone Hold Button		121,321		10
Telephone Recorder		208,535		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.