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 28, 2020	Phone Busy Indicator	19
	Simple Polarity Tester	17
Yesterday Wednesday, May 27, 2020	12VDC To 120VAC Inverter	89
	Infa-Red Remote Control	72
Of All Time	12VDC To 120VAC Inverter	1,465,135
	FM Transmitter	968,236

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		208,872		61	*
Car Alarm Arming Horn Beep Canceller	bob	120,084		6	*
Wireless Auto Tachometer		321,894		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	145,795		29	*
Parallel (Printer) Port Interface		262,040		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		421,232		63	*
3 Channel Spectrum Analyzer		202,562		20
40W Fluorescent Lamp Inverter	Bart Milnes	310,915		60	*
Adjustable Strobe Light		286,326		36
Black Light		250,855		29
Colour (Sound) Organ		268,596		36
Electronic Dice NEW!		170,349		10	*
Fantastic Atom Expander		183,262		25
Flash Slave Trigger		200,895		18	*
Infa-Red Remote Control		610,388		216	*
IR Remote Extender NEW!		112,285		2	*
IR Remote Jammer	Carl	243,615		110	*
IR Remote Switch NEW!		140,756		9	*
LASER Transmitter/Receiver		387,576		92
LED Chaser		425,406		83	*
LED Metronome NEW!		88,545		3	*
LED Thermometer		191,652		22	*
Light/Dark Detector		289,722		90	*
Simple Colour Organ		123,969		10	*
Strobe Light		258,121		27	*
TRIAC Light Dimmer		480,121		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		335,715		122	*
Electromagnetic Levitator NEW!		128,404		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		893,392		214	*
AC Motor Speed Controller		364,664		29	*
Air Flow Detector		235,569		54	*
Digital Keypad Combination Lock		181,141		20
Low Voltage Alarm		210,502		58	*
Pine Racecar Victory Judge		89,722		1	*
Pulse Width Modulation DC Motor Control		628,528		94
Rain Detector		288,685		112	*
Simple Lie Detector		541,117		323
Simple Polarity Tester	Dudley LeRoux	147,546		13	*
Simple Servo Controller		204,042		22	*
Simple Touch Switch NEW!		153,743		5	*
Simple Two Speed Contactor DC Motor Controller		189,051		21	*
Stepper Motor Controller		716,985		120	*
Time Delay Relay		536,379		88
Time Delay Relay II	jawaharlal@excite.com	225,779		39	*
Touch Switch		272,580		51	*
Video Activated Relay		107,690		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	163,206		10	*
Water Detector With Sump/Bilge Pump Controller		134,099		18	*
Wire Loop Alarm	Alex Meaden	190,618		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		292,850		25	*
12VDC To 120VAC Inverter		1,465,135		689
6V to 12V Converter		497,549		121
Automatic 12V Lead Acid Battery Charger		906,295		247
Automatic Load Sensing Power Switch		148,862		16	*
Car Battery Charger		857,070		159	*
Dual Polarity Power Supply		354,024		84	*
Fixed Voltage Power Supply		292,562		52	*
High Current Power Supply		316,107		65	*
High Voltage High Current Power Supply		235,916		35	*
LASER Power Supply		275,636		28
Portable CD Player Adapter For Car		194,324		12	*
Power Supply		714,332		259	*
Solid State Tesla Coil NEW!		130,014		4
Solid State Tesla Coil/High Voltage Generator		415,837		50
Transformerless Power Supply		442,435		117	*
Voltage Inverter		316,463		51	*
Voltage Inverter II		185,274		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		564,711		182
3 Watt FM Transmitter	Rae XL Tkacik	313,428		82	*
50 Watt Amplifier		486,059		74
8 Note Tune Player		126,826		12	*
8 Watt Audio Amp		350,034		67	*
Aircraft Radio Communications Receiver		256,816		49	*
Crystal Radio		147,384		53	*
Digital Volume Control		313,741		47	*
Electronic Stethoscope		292,321		141	*
FET Audio Mixer		322,757		41
FM Transmitter		968,236		419
Guitar Fuzz Effect		226,159		52	*
Microphone Mixer	Anatoly I. Shikhatov	232,681		26	*
Mono To Stereo Synthesizer	oRbEq	115,614		18	*
One Tube Regenerative Radio NEW!		118,844		4	*
Op Amp Radio		364,042		80	*
Single Chip AM Radio NEW!		88,111		2	*
Single Chip FM Radio NEW!		152,944		1	*
Sound Level Meter		323,161		51	*
Stereo Tube Amplifier	Weslee Kinsler	250,184		15	*
Tone Control		288,210		31
Transistor Organ		180,105		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		149,261		27	*
FM Telephone Bug		220,978		57
Phone Busy Indicator		199,674		24	*
Remote Telephone Ringer		104,366		3	*
Ringing Phone Light Flasher		197,144		35	*
Simple Phone Tap	Derek Tombrello	351,432		98	*
Telephone Hold Button		114,295		10
Telephone Recorder		200,174		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.