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, May 26, 2019	6V to 12V Converter	99
	Sound Level Meter	83
Yesterday Saturday, May 25, 2019	12VDC To 120VAC Inverter	66
	FM Transmitter	60
Of All Time	12VDC To 120VAC Inverter	1,439,681
	FM Transmitter	951,476

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		198,558		61	*
Car Alarm Arming Horn Beep Canceller	bob	109,706		6	*
Wireless Auto Tachometer		307,964		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	138,216		29	*
Parallel (Printer) Port Interface		247,589		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		404,302		63	*
3 Channel Spectrum Analyzer		193,650		20
40W Fluorescent Lamp Inverter	Bart Milnes	298,646		60	*
Adjustable Strobe Light		273,934		36
Black Light		235,962		29
Colour (Sound) Organ		256,612		36
Electronic Dice NEW!		159,179		10	*
Fantastic Atom Expander		170,980		25
Flash Slave Trigger		190,059		18	*
Infa-Red Remote Control		595,103		216	*
IR Remote Extender NEW!		99,958		2	*
IR Remote Jammer	Carl	233,164		110	*
IR Remote Switch NEW!		129,695		9	*
LASER Transmitter/Receiver		374,021		92
LED Chaser		415,538		83	*
LED Metronome NEW!		84,535		3	*
LED Thermometer		182,956		22	*
Light/Dark Detector		281,043		90	*
Simple Colour Organ		117,132		10	*
Strobe Light		249,975		27	*
TRIAC Light Dimmer		464,827		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		321,919		122	*
Electromagnetic Levitator NEW!		120,290		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		875,042		214	*
AC Motor Speed Controller		352,086		29	*
Air Flow Detector		227,369		54	*
Digital Keypad Combination Lock		171,722		20
Low Voltage Alarm		201,293		58	*
Pine Racecar Victory Judge		82,017		1	*
Pulse Width Modulation DC Motor Control		618,464		93
Rain Detector		280,839		112	*
Simple Lie Detector		529,597		323
Simple Polarity Tester	Dudley LeRoux	136,309		13	*
Simple Servo Controller		194,606		22	*
Simple Touch Switch NEW!		146,362		5	*
Simple Two Speed Contactor DC Motor Controller		180,947		21	*
Stepper Motor Controller		703,758		120	*
Time Delay Relay		523,422		88
Time Delay Relay II	jawaharlal@excite.com	214,483		39	*
Touch Switch		263,788		51	*
Video Activated Relay		100,655		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	154,148		10	*
Water Detector With Sump/Bilge Pump Controller		126,170		18	*
Wire Loop Alarm	Alex Meaden	183,195		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		280,801		25	*
12VDC To 120VAC Inverter		1,439,681		688
6V to 12V Converter		464,182		121
Automatic 12V Lead Acid Battery Charger		888,373		246
Automatic Load Sensing Power Switch		139,932		16	*
Car Battery Charger		841,127		159	*
Dual Polarity Power Supply		346,659		84	*
Fixed Voltage Power Supply		284,083		52	*
High Current Power Supply		304,105		65	*
High Voltage High Current Power Supply		227,521		35	*
LASER Power Supply		264,211		28
Portable CD Player Adapter For Car		185,825		12	*
Power Supply		700,260		259	*
Solid State Tesla Coil NEW!		123,751		4
Solid State Tesla Coil/High Voltage Generator		401,719		50
Transformerless Power Supply		431,669		117	*
Voltage Inverter		309,187		51	*
Voltage Inverter II		177,846		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		554,254		182
3 Watt FM Transmitter	Rae XL Tkacik	303,152		82	*
50 Watt Amplifier		474,453		74
8 Note Tune Player		119,854		12	*
8 Watt Audio Amp		338,689		67	*
Aircraft Radio Communications Receiver		242,337		49	*
Crystal Radio		141,719		53	*
Digital Volume Control		303,971		47	*
Electronic Stethoscope		281,524		141	*
FET Audio Mixer		312,953		41
FM Transmitter		951,476		419
Guitar Fuzz Effect		215,761		52	*
Microphone Mixer	Anatoly I. Shikhatov	222,342		26	*
Mono To Stereo Synthesizer	oRbEq	106,099		18	*
One Tube Regenerative Radio NEW!		111,404		4	*
Op Amp Radio		352,507		80	*
Single Chip AM Radio NEW!		83,670		2	*
Single Chip FM Radio NEW!		142,303		1	*
Sound Level Meter		312,887		51	*
Stereo Tube Amplifier	Weslee Kinsler	240,407		15	*
Tone Control		277,254		31
Transistor Organ		170,270		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		141,891		27	*
FM Telephone Bug		212,272		57
Phone Busy Indicator		191,157		24	*
Remote Telephone Ringer		97,551		3	*
Ringing Phone Light Flasher		187,824		34	*
Simple Phone Tap	Derek Tombrello	337,655		98	*
Telephone Hold Button		105,468		10
Telephone Recorder		189,066		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.