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 Monday, October 23, 2017	12VDC To 120VAC Inverter	32
	Dual Polarity Power Supply	31
Yesterday Sunday, October 22, 2017	Dual Polarity Power Supply	91
	12VDC To 120VAC Inverter	90
Of All Time	12VDC To 120VAC Inverter	1,392,739
	FM Transmitter	924,093

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		186,025		61	*
Car Alarm Arming Horn Beep Canceller	bob	98,337		6	*
Wireless Auto Tachometer		293,209		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	129,807		29	*
Parallel (Printer) Port Interface		232,159		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		387,450		62	*
3 Channel Spectrum Analyzer		180,202		20
40W Fluorescent Lamp Inverter	Bart Milnes	285,909		60	*
Adjustable Strobe Light		258,267		36
Black Light		220,293		29
Colour (Sound) Organ		242,511		36
Electronic Dice NEW!		147,283		9	*
Fantastic Atom Expander		157,006		25
Flash Slave Trigger		178,153		17	*
Infa-Red Remote Control		574,885		216	*
IR Remote Extender NEW!		87,315		2	*
IR Remote Jammer	Carl	220,302		110	*
IR Remote Switch NEW!		117,225		9	*
LASER Transmitter/Receiver		357,915		92
LED Chaser		400,889		83	*
LED Metronome NEW!		77,497		3	*
LED Thermometer		171,823		22	*
Light/Dark Detector		270,570		89	*
Simple Colour Organ		107,877		10	*
Strobe Light		239,285		27	*
TRIAC Light Dimmer		449,519		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		307,449		122	*
Electromagnetic Levitator NEW!		108,228		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		848,585		214	*
AC Motor Speed Controller		331,691		29	*
Air Flow Detector		215,327		54	*
Digital Keypad Combination Lock		159,162		20
Low Voltage Alarm		188,360		58	*
Pine Racecar Victory Judge		72,464		1	*
Pulse Width Modulation DC Motor Control		603,633		93
Rain Detector		267,974		112	*
Simple Lie Detector		510,791		323
Simple Polarity Tester	Dudley LeRoux	123,983		13	*
Simple Servo Controller		180,260		22	*
Simple Touch Switch NEW!		134,845		5	*
Simple Two Speed Contactor DC Motor Controller		171,913		21	*
Stepper Motor Controller		666,841		120	*
Time Delay Relay		504,486		88
Time Delay Relay II	jawaharlal@excite.com	200,127		39	*
Touch Switch		251,881		51	*
Video Activated Relay		90,392		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	141,701		10	*
Water Detector With Sump/Bilge Pump Controller		115,493		18	*
Wire Loop Alarm	Alex Meaden	173,842		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		261,273		25	*
12VDC To 120VAC Inverter		1,392,739		687
6V to 12V Converter		440,089		121
Automatic 12V Lead Acid Battery Charger		858,611		246
Automatic Load Sensing Power Switch		128,956		15	*
Car Battery Charger		811,936		159	*
Dual Polarity Power Supply		303,989		84	*
Fixed Voltage Power Supply		273,031		52	*
High Current Power Supply		290,136		64	*
High Voltage High Current Power Supply		217,040		35	*
LASER Power Supply		247,008		28
Portable CD Player Adapter For Car		174,621		12	*
Power Supply		677,429		259	*
Solid State Tesla Coil NEW!		112,244		3
Solid State Tesla Coil/High Voltage Generator		378,797		50
Transformerless Power Supply		412,901		117	*
Voltage Inverter		298,718		51	*
Voltage Inverter II		169,343		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		537,773		182
3 Watt FM Transmitter	Rae XL Tkacik	289,720		81	*
50 Watt Amplifier		453,663		74
8 Note Tune Player		111,592		12	*
8 Watt Audio Amp		322,023		67	*
Aircraft Radio Communications Receiver		226,265		49	*
Crystal Radio		132,471		53	*
Digital Volume Control		290,817		47	*
Electronic Stethoscope		266,495		141	*
FET Audio Mixer		296,678		40
FM Transmitter		924,093		418
Guitar Fuzz Effect		200,054		52	*
Microphone Mixer	Anatoly I. Shikhatov	208,735		26	*
Mono To Stereo Synthesizer	oRbEq	94,455		18	*
One Tube Regenerative Radio NEW!		99,241		4	*
Op Amp Radio		335,782		80	*
Single Chip AM Radio NEW!		76,322		2	*
Single Chip FM Radio NEW!		127,398		1	*
Sound Level Meter		298,598		51	*
Stereo Tube Amplifier	Weslee Kinsler	227,786		15	*
Tone Control		262,553		31
Transistor Organ		158,187		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		133,828		27	*
FM Telephone Bug		197,973		57
Phone Busy Indicator		177,261		24	*
Remote Telephone Ringer		89,960		3	*
Ringing Phone Light Flasher		176,404		33	*
Simple Phone Tap	Derek Tombrello	325,656		98	*
Telephone Hold Button		94,157		9
Telephone Recorder		178,474		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.