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, July 07, 2022	6V to 12V Converter	17
	12VDC To 120VAC Inverter	17
Yesterday Wednesday, July 06, 2022	12VDC To 120VAC Inverter	44
	AC Motor Speed Controller	32
Of All Time	12VDC To 120VAC Inverter	1,502,857
	FM Transmitter	992,780

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		221,744		61	*
Car Alarm Arming Horn Beep Canceller	bob	131,870		6	*
Wireless Auto Tachometer		336,808		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	155,393		29	*
Parallel (Printer) Port Interface		278,378		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		440,314		63	*
3 Channel Spectrum Analyzer		215,162		20
40W Fluorescent Lamp Inverter	Bart Milnes	324,393		60	*
Adjustable Strobe Light		302,066		36
Black Light		270,386		29
Colour (Sound) Organ		283,692		36
Electronic Dice NEW!		183,373		10	*
Fantastic Atom Expander		198,066		25
Flash Slave Trigger		214,867		18	*
Infa-Red Remote Control		627,011		216	*
IR Remote Extender NEW!		126,552		2	*
IR Remote Jammer	Carl	258,843		110	*
IR Remote Switch NEW!		152,825		9	*
LASER Transmitter/Receiver		406,217		92
LED Chaser		438,299		83	*
LED Metronome NEW!		95,106		3	*
LED Thermometer		201,860		22	*
Light/Dark Detector		301,223		90	*
Simple Colour Organ		133,175		10	*
Strobe Light		269,647		27	*
TRIAC Light Dimmer		543,749		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		353,248		122	*
Electromagnetic Levitator NEW!		139,166		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		913,881		214	*
AC Motor Speed Controller		380,903		29	*
Air Flow Detector		246,519		54	*
Digital Keypad Combination Lock		191,841		20
Low Voltage Alarm		223,998		58	*
Pine Racecar Victory Judge		98,772		1	*
Pulse Width Modulation DC Motor Control		641,742		94
Rain Detector		299,417		112	*
Simple Lie Detector		554,139		323
Simple Polarity Tester	Dudley LeRoux	160,180		13	*
Simple Servo Controller		215,875		22	*
Simple Touch Switch NEW!		164,460		5	*
Simple Two Speed Contactor DC Motor Controller		199,729		21	*
Stepper Motor Controller		736,004		120	*
Time Delay Relay		549,249		88
Time Delay Relay II	jawaharlal@excite.com	239,924		39	*
Touch Switch		284,209		51	*
Video Activated Relay		117,120		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	174,641		10	*
Water Detector With Sump/Bilge Pump Controller		147,864		18	*
Wire Loop Alarm	Alex Meaden	200,934		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		306,635		25	*
12VDC To 120VAC Inverter		1,502,857		690
6V to 12V Converter		518,453		121
Automatic 12V Lead Acid Battery Charger		927,105		248
Automatic Load Sensing Power Switch		161,660		16	*
Car Battery Charger		873,935		159	*
Dual Polarity Power Supply		364,519		84	*
Fixed Voltage Power Supply		304,734		52	*
High Current Power Supply		330,221		66	*
High Voltage High Current Power Supply		247,067		35	*
LASER Power Supply		288,964		28
Portable CD Player Adapter For Car		206,538		12	*
Power Supply		729,807		259	*
Solid State Tesla Coil NEW!		139,673		4
Solid State Tesla Coil/High Voltage Generator		434,871		51
Transformerless Power Supply		456,463		117	*
Voltage Inverter		330,805		51	*
Voltage Inverter II		196,112		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		578,572		182
3 Watt FM Transmitter	Rae XL Tkacik	327,083		83	*
50 Watt Amplifier		500,032		74
8 Note Tune Player		136,245		12	*
8 Watt Audio Amp		365,018		67	*
Aircraft Radio Communications Receiver		270,022		49	*
Crystal Radio		154,102		53	*
Digital Volume Control		326,617		47	*
Electronic Stethoscope		307,619		142	*
FET Audio Mixer		336,700		41
FM Transmitter		992,780		420
Guitar Fuzz Effect		239,897		54	*
Microphone Mixer	Anatoly I. Shikhatov	244,577		26	*
Mono To Stereo Synthesizer	oRbEq	127,749		18	*
One Tube Regenerative Radio NEW!		130,784		4	*
Op Amp Radio		379,239		80	*
Single Chip AM Radio NEW!		95,028		2	*
Single Chip FM Radio NEW!		165,315		1	*
Sound Level Meter		335,201		51	*
Stereo Tube Amplifier	Weslee Kinsler	261,982		15	*
Tone Control		303,246		31
Transistor Organ		193,028		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		159,194		27	*
FM Telephone Bug		231,357		57
Phone Busy Indicator		209,464		24	*
Remote Telephone Ringer		114,230		3	*
Ringing Phone Light Flasher		210,577		35	*
Simple Phone Tap	Derek Tombrello	378,804		98	*
Telephone Hold Button		124,383		10
Telephone Recorder		211,752		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.