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 Friday, August 17, 2018	Dual Polarity Power Supply	19
	AC Motor Speed Controller	11
Yesterday Thursday, August 16, 2018	Dual Polarity Power Supply	120
	Stepper Motor Controller	79
Of All Time	12VDC To 120VAC Inverter	1,416,491
	FM Transmitter	937,282

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		190,613		61	*
Car Alarm Arming Horn Beep Canceller	bob	102,391		6	*
Wireless Auto Tachometer		298,169		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	133,357		29	*
Parallel (Printer) Port Interface		236,861		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		393,990		63	*
3 Channel Spectrum Analyzer		186,736		20
40W Fluorescent Lamp Inverter	Bart Milnes	290,699		60	*
Adjustable Strobe Light		264,392		36
Black Light		226,239		29
Colour (Sound) Organ		248,073		36
Electronic Dice NEW!		151,711		10	*
Fantastic Atom Expander		162,362		25
Flash Slave Trigger		182,693		18	*
Infa-Red Remote Control		583,202		216	*
IR Remote Extender NEW!		92,727		2	*
IR Remote Jammer	Carl	226,243		110	*
IR Remote Switch NEW!		122,680		9	*
LASER Transmitter/Receiver		364,378		92
LED Chaser		407,783		83	*
LED Metronome NEW!		81,398		3	*
LED Thermometer		176,911		22	*
Light/Dark Detector		276,018		90	*
Simple Colour Organ		111,630		10	*
Strobe Light		243,636		27	*
TRIAC Light Dimmer		456,582		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		312,772		122	*
Electromagnetic Levitator NEW!		113,414		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		860,012		214	*
AC Motor Speed Controller		340,260		29	*
Air Flow Detector		220,575		54	*
Digital Keypad Combination Lock		163,948		20
Low Voltage Alarm		194,209		58	*
Pine Racecar Victory Judge		76,018		1	*
Pulse Width Modulation DC Motor Control		611,181		93
Rain Detector		273,216		112	*
Simple Lie Detector		519,012		323
Simple Polarity Tester	Dudley LeRoux	128,928		13	*
Simple Servo Controller		185,219		22	*
Simple Touch Switch NEW!		139,677		5	*
Simple Two Speed Contactor DC Motor Controller		176,051		21	*
Stepper Motor Controller		683,419		120	*
Time Delay Relay		513,727		88
Time Delay Relay II	jawaharlal@excite.com	205,829		39	*
Touch Switch		257,173		51	*
Video Activated Relay		94,927		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	146,797		10	*
Water Detector With Sump/Bilge Pump Controller		120,498		18	*
Wire Loop Alarm	Alex Meaden	178,138		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		269,661		25	*
12VDC To 120VAC Inverter		1,416,491		688
6V to 12V Converter		451,809		121
Automatic 12V Lead Acid Battery Charger		874,455		246
Automatic Load Sensing Power Switch		134,142		16	*
Car Battery Charger		826,813		159	*
Dual Polarity Power Supply		323,621		84	*
Fixed Voltage Power Supply		278,146		52	*
High Current Power Supply		295,680		65	*
High Voltage High Current Power Supply		221,688		35	*
LASER Power Supply		253,350		28
Portable CD Player Adapter For Car		179,897		12	*
Power Supply		688,233		259	*
Solid State Tesla Coil NEW!		118,447		4
Solid State Tesla Coil/High Voltage Generator		388,610		50
Transformerless Power Supply		419,148		117	*
Voltage Inverter		304,519		51	*
Voltage Inverter II		173,188		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		546,449		182
3 Watt FM Transmitter	Rae XL Tkacik	296,216		82	*
50 Watt Amplifier		463,054		74
8 Note Tune Player		115,433		12	*
8 Watt Audio Amp		328,890		67	*
Aircraft Radio Communications Receiver		233,075		49	*
Crystal Radio		136,522		53	*
Digital Volume Control		296,708		47	*
Electronic Stethoscope		273,871		141	*
FET Audio Mixer		305,343		41
FM Transmitter		937,282		419
Guitar Fuzz Effect		205,931		52	*
Microphone Mixer	Anatoly I. Shikhatov	215,008		26	*
Mono To Stereo Synthesizer	oRbEq	98,542		18	*
One Tube Regenerative Radio NEW!		104,752		4	*
Op Amp Radio		344,629		80	*
Single Chip AM Radio NEW!		80,278		2	*
Single Chip FM Radio NEW!		133,541		1	*
Sound Level Meter		304,511		51	*
Stereo Tube Amplifier	Weslee Kinsler	232,476		15	*
Tone Control		268,498		31
Transistor Organ		163,261		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		137,337		27	*
FM Telephone Bug		202,328		57
Phone Busy Indicator		184,448		24	*
Remote Telephone Ringer		93,225		3	*
Ringing Phone Light Flasher		182,056		34	*
Simple Phone Tap	Derek Tombrello	329,533		98	*
Telephone Hold Button		97,682		10
Telephone Recorder		183,079		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.