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, January 19, 2019	Simple Colour Organ	22
	Car Battery Charger	15
Yesterday Friday, January 18, 2019	12VDC To 120VAC Inverter	86
	Dual Polarity Power Supply	78
Of All Time	12VDC To 120VAC Inverter	1,426,522
	FM Transmitter	943,909

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		195,072		61	*
Car Alarm Arming Horn Beep Canceller	bob	106,432		6	*
Wireless Auto Tachometer		302,599		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	135,835		29	*
Parallel (Printer) Port Interface		241,460		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		398,941		63	*
3 Channel Spectrum Analyzer		190,585		20
40W Fluorescent Lamp Inverter	Bart Milnes	294,940		60	*
Adjustable Strobe Light		269,694		36
Black Light		231,193		29
Colour (Sound) Organ		252,671		36
Electronic Dice NEW!		155,375		10	*
Fantastic Atom Expander		167,189		25
Flash Slave Trigger		186,397		18	*
Infa-Red Remote Control		589,173		216	*
IR Remote Extender NEW!		96,160		2	*
IR Remote Jammer	Carl	230,213		110	*
IR Remote Switch NEW!		126,226		9	*
LASER Transmitter/Receiver		369,626		92
LED Chaser		412,506		83	*
LED Metronome NEW!		83,082		3	*
LED Thermometer		180,330		22	*
Light/Dark Detector		278,460		90	*
Simple Colour Organ		114,952		10	*
Strobe Light		247,542		27	*
TRIAC Light Dimmer		460,451		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		317,496		122	*
Electromagnetic Levitator NEW!		117,476		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		867,351		214	*
AC Motor Speed Controller		346,602		29	*
Air Flow Detector		224,496		54	*
Digital Keypad Combination Lock		168,305		20
Low Voltage Alarm		198,493		58	*
Pine Racecar Victory Judge		79,008		1	*
Pulse Width Modulation DC Motor Control		614,890		93
Rain Detector		278,046		112	*
Simple Lie Detector		524,606		323
Simple Polarity Tester	Dudley LeRoux	132,766		13	*
Simple Servo Controller		188,994		22	*
Simple Touch Switch NEW!		143,772		5	*
Simple Two Speed Contactor DC Motor Controller		178,390		21	*
Stepper Motor Controller		697,518		120	*
Time Delay Relay		519,124		88
Time Delay Relay II	jawaharlal@excite.com	210,151		39	*
Touch Switch		261,147		51	*
Video Activated Relay		98,400		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	150,804		10	*
Water Detector With Sump/Bilge Pump Controller		123,975		18	*
Wire Loop Alarm	Alex Meaden	180,738		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		274,745		25	*
12VDC To 120VAC Inverter		1,426,522		688
6V to 12V Converter		457,407		121
Automatic 12V Lead Acid Battery Charger		880,936		246
Automatic Load Sensing Power Switch		137,077		16	*
Car Battery Charger		834,241		159	*
Dual Polarity Power Supply		342,296		84	*
Fixed Voltage Power Supply		281,262		52	*
High Current Power Supply		299,364		65	*
High Voltage High Current Power Supply		224,781		35	*
LASER Power Supply		257,792		28
Portable CD Player Adapter For Car		182,933		12	*
Power Supply		694,480		259	*
Solid State Tesla Coil NEW!		121,763		4
Solid State Tesla Coil/High Voltage Generator		394,786		50
Transformerless Power Supply		423,001		117	*
Voltage Inverter		307,027		51	*
Voltage Inverter II		175,624		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		550,560		182
3 Watt FM Transmitter	Rae XL Tkacik	299,916		82	*
50 Watt Amplifier		468,923		74
8 Note Tune Player		117,702		12	*
8 Watt Audio Amp		333,609		67	*
Aircraft Radio Communications Receiver		237,256		49	*
Crystal Radio		138,843		53	*
Digital Volume Control		300,031		47	*
Electronic Stethoscope		277,856		141	*
FET Audio Mixer		309,354		41
FM Transmitter		943,909		419
Guitar Fuzz Effect		210,312		52	*
Microphone Mixer	Anatoly I. Shikhatov	218,446		26	*
Mono To Stereo Synthesizer	oRbEq	102,516		18	*
One Tube Regenerative Radio NEW!		107,789		4	*
Op Amp Radio		348,592		80	*
Single Chip AM Radio NEW!		82,189		2	*
Single Chip FM Radio NEW!		137,676		1	*
Sound Level Meter		308,215		51	*
Stereo Tube Amplifier	Weslee Kinsler	235,915		15	*
Tone Control		272,465		31
Transistor Organ		166,523		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		139,617		27	*
FM Telephone Bug		206,747		57
Phone Busy Indicator		187,624		24	*
Remote Telephone Ringer		95,405		3	*
Ringing Phone Light Flasher		184,944		34	*
Simple Phone Tap	Derek Tombrello	333,657		98	*
Telephone Hold Button		100,893		10
Telephone Recorder		186,046		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.