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, July 22, 2018	Dual Polarity Power Supply	56
	12VDC To 120VAC Inverter	46
Yesterday Saturday, July 21, 2018	22 Watt Audio Amplifier	82
	Dual Polarity Power Supply	78
Of All Time	12VDC To 120VAC Inverter	1,415,097
	FM Transmitter	936,389

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		190,156		61	*
Car Alarm Arming Horn Beep Canceller	bob	101,977		6	*
Wireless Auto Tachometer		297,824		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	133,094		29	*
Parallel (Printer) Port Interface		236,522		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		393,576		63	*
3 Channel Spectrum Analyzer		186,162		20
40W Fluorescent Lamp Inverter	Bart Milnes	290,386		60	*
Adjustable Strobe Light		263,796		36
Black Light		225,622		29
Colour (Sound) Organ		247,758		36
Electronic Dice NEW!		151,454		10	*
Fantastic Atom Expander		161,894		25
Flash Slave Trigger		182,215		18	*
Infa-Red Remote Control		582,297		216	*
IR Remote Extender NEW!		92,396		2	*
IR Remote Jammer	Carl	225,624		110	*
IR Remote Switch NEW!		122,406		9	*
LASER Transmitter/Receiver		363,775		92
LED Chaser		407,105		83	*
LED Metronome NEW!		81,116		3	*
LED Thermometer		176,426		22	*
Light/Dark Detector		275,710		90	*
Simple Colour Organ		111,203		10	*
Strobe Light		243,177		27	*
TRIAC Light Dimmer		456,164		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		312,358		122	*
Electromagnetic Levitator NEW!		112,906		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		859,130		214	*
AC Motor Speed Controller		339,445		29	*
Air Flow Detector		220,059		54	*
Digital Keypad Combination Lock		163,525		20
Low Voltage Alarm		193,690		58	*
Pine Racecar Victory Judge		75,636		1	*
Pulse Width Modulation DC Motor Control		610,639		93
Rain Detector		272,533		112	*
Simple Lie Detector		518,367		323
Simple Polarity Tester	Dudley LeRoux	128,455		13	*
Simple Servo Controller		184,928		22	*
Simple Touch Switch NEW!		139,210		5	*
Simple Two Speed Contactor DC Motor Controller		175,814		21	*
Stepper Motor Controller		681,566		120	*
Time Delay Relay		512,957		88
Time Delay Relay II	jawaharlal@excite.com	205,187		39	*
Touch Switch		256,658		51	*
Video Activated Relay		94,491		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	146,490		10	*
Water Detector With Sump/Bilge Pump Controller		120,024		18	*
Wire Loop Alarm	Alex Meaden	177,845		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		269,021		25	*
12VDC To 120VAC Inverter		1,415,097		688
6V to 12V Converter		450,950		121
Automatic 12V Lead Acid Battery Charger		873,606		246
Automatic Load Sensing Power Switch		133,787		16	*
Car Battery Charger		825,528		159	*
Dual Polarity Power Supply		321,012		84	*
Fixed Voltage Power Supply		277,811		52	*
High Current Power Supply		295,317		65	*
High Voltage High Current Power Supply		221,405		35	*
LASER Power Supply		252,909		28
Portable CD Player Adapter For Car		179,536		12	*
Power Supply		687,455		259	*
Solid State Tesla Coil NEW!		118,091		4
Solid State Tesla Coil/High Voltage Generator		387,809		50
Transformerless Power Supply		418,754		117	*
Voltage Inverter		304,109		51	*
Voltage Inverter II		172,934		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		545,892		182
3 Watt FM Transmitter	Rae XL Tkacik	295,775		82	*
50 Watt Amplifier		462,347		74
8 Note Tune Player		115,230		12	*
8 Watt Audio Amp		328,387		67	*
Aircraft Radio Communications Receiver		232,523		49	*
Crystal Radio		136,260		53	*
Digital Volume Control		296,321		47	*
Electronic Stethoscope		273,445		141	*
FET Audio Mixer		304,823		41
FM Transmitter		936,389		419
Guitar Fuzz Effect		205,430		52	*
Microphone Mixer	Anatoly I. Shikhatov	214,671		26	*
Mono To Stereo Synthesizer	oRbEq	98,225		18	*
One Tube Regenerative Radio NEW!		104,358		4	*
Op Amp Radio		344,161		80	*
Single Chip AM Radio NEW!		80,007		2	*
Single Chip FM Radio NEW!		133,131		1	*
Sound Level Meter		304,099		51	*
Stereo Tube Amplifier	Weslee Kinsler	232,194		15	*
Tone Control		268,160		31
Transistor Organ		162,950		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		137,094		27	*
FM Telephone Bug		202,075		57
Phone Busy Indicator		184,103		24	*
Remote Telephone Ringer		93,043		3	*
Ringing Phone Light Flasher		181,667		34	*
Simple Phone Tap	Derek Tombrello	329,304		98	*
Telephone Hold Button		97,440		10
Telephone Recorder		182,782		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.