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 Wednesday, August 23, 2017	Dual Polarity Power Supply	13
	12VDC To 120VAC Inverter	8
Yesterday Tuesday, August 22, 2017	Dual Polarity Power Supply	108
	12VDC To 120VAC Inverter	70
Of All Time	12VDC To 120VAC Inverter	1,387,287
	FM Transmitter	920,986

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		184,917		61	*
Car Alarm Arming Horn Beep Canceller	bob	97,218		6	*
Wireless Auto Tachometer		291,886		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	128,719		29	*
Parallel (Printer) Port Interface		231,082		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		385,807		62	*
3 Channel Spectrum Analyzer		178,605		20
40W Fluorescent Lamp Inverter	Bart Milnes	284,568		60	*
Adjustable Strobe Light		256,687		36
Black Light		218,940		29
Colour (Sound) Organ		241,167		36
Electronic Dice NEW!		146,412		9	*
Fantastic Atom Expander		155,581		25
Flash Slave Trigger		176,974		17	*
Infa-Red Remote Control		573,457		216	*
IR Remote Extender NEW!		86,280		2	*
IR Remote Jammer	Carl	219,197		110	*
IR Remote Switch NEW!		116,260		9	*
LASER Transmitter/Receiver		356,645		92
LED Chaser		399,241		83	*
LED Metronome NEW!		76,797		3	*
LED Thermometer		170,636		22	*
Light/Dark Detector		269,226		89	*
Simple Colour Organ		107,039		10	*
Strobe Light		238,087		27	*
TRIAC Light Dimmer		447,744		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		306,289		122	*
Electromagnetic Levitator NEW!		107,081		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		846,159		214	*
AC Motor Speed Controller		329,693		29	*
Air Flow Detector		214,198		54	*
Digital Keypad Combination Lock		157,974		20
Low Voltage Alarm		186,948		58	*
Pine Racecar Victory Judge		71,544		1	*
Pulse Width Modulation DC Motor Control		601,752		93
Rain Detector		266,685		112	*
Simple Lie Detector		509,104		323
Simple Polarity Tester	Dudley LeRoux	122,781		13	*
Simple Servo Controller		178,723		22	*
Simple Touch Switch NEW!		133,931		5	*
Simple Two Speed Contactor DC Motor Controller		170,797		21	*
Stepper Motor Controller		664,276		120	*
Time Delay Relay		502,489		88
Time Delay Relay II	jawaharlal@excite.com	198,859		39	*
Touch Switch		250,372		51	*
Video Activated Relay		89,380		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	140,784		10	*
Water Detector With Sump/Bilge Pump Controller		114,457		18	*
Wire Loop Alarm	Alex Meaden	172,711		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		259,524		25	*
12VDC To 120VAC Inverter		1,387,287		687
6V to 12V Converter		437,475		121
Automatic 12V Lead Acid Battery Charger		855,345		246
Automatic Load Sensing Power Switch		127,880		15	*
Car Battery Charger		808,835		159	*
Dual Polarity Power Supply		298,419		84	*
Fixed Voltage Power Supply		271,829		52	*
High Current Power Supply		288,591		64	*
High Voltage High Current Power Supply		215,863		35	*
LASER Power Supply		245,516		28
Portable CD Player Adapter For Car		173,287		12	*
Power Supply		675,050		259	*
Solid State Tesla Coil NEW!		111,114		3
Solid State Tesla Coil/High Voltage Generator		376,656		50
Transformerless Power Supply		411,521		117	*
Voltage Inverter		297,363		51	*
Voltage Inverter II		168,574		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		535,581		182
3 Watt FM Transmitter	Rae XL Tkacik	287,972		81	*
50 Watt Amplifier		451,363		74
8 Note Tune Player		110,669		12	*
8 Watt Audio Amp		320,022		67	*
Aircraft Radio Communications Receiver		224,671		49	*
Crystal Radio		131,568		53	*
Digital Volume Control		289,219		47	*
Electronic Stethoscope		264,867		141	*
FET Audio Mixer		294,770		40
FM Transmitter		920,986		418
Guitar Fuzz Effect		198,636		52	*
Microphone Mixer	Anatoly I. Shikhatov	207,329		26	*
Mono To Stereo Synthesizer	oRbEq	93,194		18	*
One Tube Regenerative Radio NEW!		98,076		4	*
Op Amp Radio		333,824		80	*
Single Chip AM Radio NEW!		75,486		2	*
Single Chip FM Radio NEW!		126,160		1	*
Sound Level Meter		297,112		51	*
Stereo Tube Amplifier	Weslee Kinsler	226,283		15	*
Tone Control		260,433		31
Transistor Organ		156,923		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		133,053		27	*
FM Telephone Bug		196,885		57
Phone Busy Indicator		175,845		24	*
Remote Telephone Ringer		89,090		3	*
Ringing Phone Light Flasher		175,071		33	*
Simple Phone Tap	Derek Tombrello	324,557		98	*
Telephone Hold Button		93,238		9
Telephone Recorder		177,411		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.