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 Thursday, May 23, 2019	12VDC To 120VAC Inverter	33
	7 Segment LED Counter	32
Yesterday Wednesday, May 22, 2019	12VDC To 120VAC Inverter	87
	7 Segment LED Counter	78
Of All Time	12VDC To 120VAC Inverter	1,439,469
	FM Transmitter	951,271

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		198,463		61	*
Car Alarm Arming Horn Beep Canceller	bob	109,633		6	*
Wireless Auto Tachometer		307,834		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	138,150		29	*
Parallel (Printer) Port Interface		247,458		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		404,176		63	*
3 Channel Spectrum Analyzer		193,584		20
40W Fluorescent Lamp Inverter	Bart Milnes	298,550		60	*
Adjustable Strobe Light		273,844		36
Black Light		235,810		29
Colour (Sound) Organ		256,520		36
Electronic Dice NEW!		159,103		10	*
Fantastic Atom Expander		170,897		25
Flash Slave Trigger		189,959		18	*
Infa-Red Remote Control		595,013		216	*
IR Remote Extender NEW!		99,853		2	*
IR Remote Jammer	Carl	233,093		110	*
IR Remote Switch NEW!		129,612		9	*
LASER Transmitter/Receiver		373,909		92
LED Chaser		415,458		83	*
LED Metronome NEW!		84,474		3	*
LED Thermometer		182,896		22	*
Light/Dark Detector		280,971		90	*
Simple Colour Organ		117,081		10	*
Strobe Light		249,909		27	*
TRIAC Light Dimmer		464,738		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		321,814		122	*
Electromagnetic Levitator NEW!		120,223		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		874,872		214	*
AC Motor Speed Controller		351,964		29	*
Air Flow Detector		227,304		54	*
Digital Keypad Combination Lock		171,638		20
Low Voltage Alarm		201,224		58	*
Pine Racecar Victory Judge		81,957		1	*
Pulse Width Modulation DC Motor Control		618,365		93
Rain Detector		280,787		112	*
Simple Lie Detector		529,493		323
Simple Polarity Tester	Dudley LeRoux	136,233		13	*
Simple Servo Controller		194,457		22	*
Simple Touch Switch NEW!		146,313		5	*
Simple Two Speed Contactor DC Motor Controller		180,881		21	*
Stepper Motor Controller		703,616		120	*
Time Delay Relay		523,319		88
Time Delay Relay II	jawaharlal@excite.com	214,396		39	*
Touch Switch		263,720		51	*
Video Activated Relay		100,610		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	154,044		10	*
Water Detector With Sump/Bilge Pump Controller		126,114		18	*
Wire Loop Alarm	Alex Meaden	183,132		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		280,669		25	*
12VDC To 120VAC Inverter		1,439,469		688
6V to 12V Converter		463,890		121
Automatic 12V Lead Acid Battery Charger		888,180		246
Automatic Load Sensing Power Switch		139,853		16	*
Car Battery Charger		840,980		159	*
Dual Polarity Power Supply		346,574		84	*
Fixed Voltage Power Supply		284,001		52	*
High Current Power Supply		303,969		65	*
High Voltage High Current Power Supply		227,470		35	*
LASER Power Supply		264,065		28
Portable CD Player Adapter For Car		185,744		12	*
Power Supply		700,093		259	*
Solid State Tesla Coil NEW!		123,687		4
Solid State Tesla Coil/High Voltage Generator		401,532		50
Transformerless Power Supply		431,563		117	*
Voltage Inverter		309,125		51	*
Voltage Inverter II		177,793		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		554,172		182
3 Watt FM Transmitter	Rae XL Tkacik	303,063		82	*
50 Watt Amplifier		474,328		74
8 Note Tune Player		119,787		12	*
8 Watt Audio Amp		338,583		67	*
Aircraft Radio Communications Receiver		242,206		49	*
Crystal Radio		141,637		53	*
Digital Volume Control		303,884		47	*
Electronic Stethoscope		281,453		141	*
FET Audio Mixer		312,875		41
FM Transmitter		951,271		419
Guitar Fuzz Effect		215,654		52	*
Microphone Mixer	Anatoly I. Shikhatov	222,247		26	*
Mono To Stereo Synthesizer	oRbEq	106,016		18	*
One Tube Regenerative Radio NEW!		111,305		4	*
Op Amp Radio		352,415		80	*
Single Chip AM Radio NEW!		83,630		2	*
Single Chip FM Radio NEW!		142,177		1	*
Sound Level Meter		312,694		51	*
Stereo Tube Amplifier	Weslee Kinsler	240,286		15	*
Tone Control		277,149		31
Transistor Organ		170,178		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		141,838		27	*
FM Telephone Bug		212,155		57
Phone Busy Indicator		191,093		24	*
Remote Telephone Ringer		97,484		3	*
Ringing Phone Light Flasher		187,750		34	*
Simple Phone Tap	Derek Tombrello	337,572		98	*
Telephone Hold Button		105,362		10
Telephone Recorder		188,982		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.