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, April 26, 2024	Op Amp Radio	4
	12VDC To 120VAC Inverter	3
Yesterday Thursday, April 25, 2024	12VDC To 120VAC Inverter	34
	Stepper Motor Controller	33
Of All Time	12VDC To 120VAC Inverter	1,531,684
	FM Transmitter	1,009,393

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		227,642		61	*
Car Alarm Arming Horn Beep Canceller	bob	137,218		6	*
Wireless Auto Tachometer		343,763		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	160,516		29	*
Parallel (Printer) Port Interface		286,601		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		448,415		63	*
3 Channel Spectrum Analyzer		222,510		20
40W Fluorescent Lamp Inverter	Bart Milnes	330,886		60	*
Adjustable Strobe Light		309,780		36
Black Light		281,488		29
Colour (Sound) Organ		291,444		36
Electronic Dice NEW!		189,944		10	*
Fantastic Atom Expander		203,687		25
Flash Slave Trigger		221,950		18	*
Infa-Red Remote Control		637,990		216	*
IR Remote Extender NEW!		133,453		3	*
IR Remote Jammer	Carl	266,935		110	*
IR Remote Switch NEW!		158,385		9	*
LASER Transmitter/Receiver		417,304		92
LED Chaser		446,793		83	*
LED Metronome NEW!		100,163		3	*
LED Thermometer		207,491		22	*
Light/Dark Detector		306,887		90	*
Simple Colour Organ		138,221		11	*
Strobe Light		276,605		27	*
TRIAC Light Dimmer		553,639		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		360,147		122	*
Electromagnetic Levitator NEW!		145,149		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		923,114		214	*
AC Motor Speed Controller		392,274		29	*
Air Flow Detector		252,549		54	*
Digital Keypad Combination Lock		203,056		20
Low Voltage Alarm		230,021		58	*
Pine Racecar Victory Judge		103,423		1	*
Pulse Width Modulation DC Motor Control		655,761		94
Rain Detector		305,474		112	*
Simple Lie Detector		565,459		323
Simple Polarity Tester	Dudley LeRoux	166,205		13	*
Simple Servo Controller		222,250		22	*
Simple Touch Switch NEW!		170,682		6	*
Simple Two Speed Contactor DC Motor Controller		206,014		21	*
Stepper Motor Controller		746,936		120	*
Time Delay Relay		556,456		88
Time Delay Relay II	jawaharlal@excite.com	247,846		39	*
Touch Switch		290,546		51	*
Video Activated Relay		122,553		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	182,098		10	*
Water Detector With Sump/Bilge Pump Controller		153,591		18	*
Wire Loop Alarm	Alex Meaden	206,491		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		316,943		25	*
12VDC To 120VAC Inverter		1,531,684		691
6V to 12V Converter		528,449		121
Automatic 12V Lead Acid Battery Charger		938,159		248
Automatic Load Sensing Power Switch		168,198		16	*
Car Battery Charger		884,114		159	*
Dual Polarity Power Supply		372,082		84	*
Fixed Voltage Power Supply		312,079		52	*
High Current Power Supply		339,925		66	*
High Voltage High Current Power Supply		264,867		35	*
LASER Power Supply		297,059		28
Portable CD Player Adapter For Car		213,217		12	*
Power Supply		739,443		259	*
Solid State Tesla Coil NEW!		147,275		4
Solid State Tesla Coil/High Voltage Generator		445,358		51
Transformerless Power Supply		463,994		117	*
Voltage Inverter		339,990		51	*
Voltage Inverter II		204,000		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		586,318		182
3 Watt FM Transmitter	Rae XL Tkacik	336,270		83	*
50 Watt Amplifier		508,733		74
8 Note Tune Player		141,491		12	*
8 Watt Audio Amp		373,885		67	*
Aircraft Radio Communications Receiver		279,466		49	*
Crystal Radio		159,765		53	*
Digital Volume Control		339,402		47	*
Electronic Stethoscope		322,152		142	*
FET Audio Mixer		344,496		41
FM Transmitter		1,009,393		420
Guitar Fuzz Effect		248,539		54	*
Microphone Mixer	Anatoly I. Shikhatov	251,494		26	*
Mono To Stereo Synthesizer	oRbEq	134,694		18	*
One Tube Regenerative Radio NEW!		143,327		4	*
Op Amp Radio		389,877		80	*
Single Chip AM Radio NEW!		100,653		3	*
Single Chip FM Radio NEW!		173,560		1	*
Sound Level Meter		342,907		51	*
Stereo Tube Amplifier	Weslee Kinsler	269,232		15	*
Tone Control		310,665		31
Transistor Organ		200,596		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		164,420		27	*
FM Telephone Bug		236,235		57
Phone Busy Indicator		214,791		24	*
Remote Telephone Ringer		119,120		3	*
Ringing Phone Light Flasher		219,309		35	*
Simple Phone Tap	Derek Tombrello	384,471		98	*
Telephone Hold Button		129,931		10
Telephone Recorder		217,472		55	*

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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.