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, October 29, 2020	Automatic 12V Lead Acid Battery Charger	22
	Computer Controlled Frequency Counter/Logic Probe	20
Yesterday Wednesday, October 28, 2020	12VDC Fluorescent Lamp Driver	46
	12VDC To 120VAC Inverter	46
Of All Time	12VDC To 120VAC Inverter	1,472,802
	FM Transmitter	972,711

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		212,379		61	*
Car Alarm Arming Horn Beep Canceller	bob	123,387		6	*
Wireless Auto Tachometer		325,753		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	148,335		29	*
Parallel (Printer) Port Interface		266,297		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		426,134		63	*
3 Channel Spectrum Analyzer		205,734		20
40W Fluorescent Lamp Inverter	Bart Milnes	314,387		60	*
Adjustable Strobe Light		290,412		36
Black Light		255,515		29
Colour (Sound) Organ		272,503		36
Electronic Dice NEW!		173,749		10	*
Fantastic Atom Expander		186,866		25
Flash Slave Trigger		204,561		18	*
Infa-Red Remote Control		614,237		216	*
IR Remote Extender NEW!		116,335		2	*
IR Remote Jammer	Carl	246,453		110	*
IR Remote Switch NEW!		144,148		9	*
LASER Transmitter/Receiver		391,916		92
LED Chaser		428,368		83	*
LED Metronome NEW!		90,407		3	*
LED Thermometer		194,218		22	*
Light/Dark Detector		292,810		90	*
Simple Colour Organ		126,461		10	*
Strobe Light		260,798		27	*
TRIAC Light Dimmer		533,916		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		342,110		122	*
Electromagnetic Levitator NEW!		131,374		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		898,534		214	*
AC Motor Speed Controller		368,283		29	*
Air Flow Detector		238,477		54	*
Digital Keypad Combination Lock		183,860		20
Low Voltage Alarm		213,320		58	*
Pine Racecar Victory Judge		92,288		1	*
Pulse Width Modulation DC Motor Control		631,642		94
Rain Detector		291,343		112	*
Simple Lie Detector		544,294		323
Simple Polarity Tester	Dudley LeRoux	150,847		13	*
Simple Servo Controller		206,777		22	*
Simple Touch Switch NEW!		156,537		5	*
Simple Two Speed Contactor DC Motor Controller		191,875		21	*
Stepper Motor Controller		721,626		120	*
Time Delay Relay		539,960		88
Time Delay Relay II	jawaharlal@excite.com	229,229		39	*
Touch Switch		275,621		51	*
Video Activated Relay		110,086		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	166,057		10	*
Water Detector With Sump/Bilge Pump Controller		138,666		18	*
Wire Loop Alarm	Alex Meaden	193,354		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		296,353		25	*
12VDC To 120VAC Inverter		1,472,802		689
6V to 12V Converter		504,301		121
Automatic 12V Lead Acid Battery Charger		910,873		248
Automatic Load Sensing Power Switch		151,983		16	*
Car Battery Charger		861,626		159	*
Dual Polarity Power Supply		356,223		84	*
Fixed Voltage Power Supply		295,347		52	*
High Current Power Supply		319,734		66	*
High Voltage High Current Power Supply		238,651		35	*
LASER Power Supply		278,663		28
Portable CD Player Adapter For Car		197,455		12	*
Power Supply		718,143		259	*
Solid State Tesla Coil NEW!		132,228		4
Solid State Tesla Coil/High Voltage Generator		420,455		50
Transformerless Power Supply		446,159		117	*
Voltage Inverter		319,069		51	*
Voltage Inverter II		187,944		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		568,432		182
3 Watt FM Transmitter	Rae XL Tkacik	316,770		83	*
50 Watt Amplifier		489,482		74
8 Note Tune Player		129,262		12	*
8 Watt Audio Amp		353,976		67	*
Aircraft Radio Communications Receiver		259,828		49	*
Crystal Radio		149,119		53	*
Digital Volume Control		316,875		47	*
Electronic Stethoscope		295,849		141	*
FET Audio Mixer		326,087		41
FM Transmitter		972,711		420
Guitar Fuzz Effect		229,337		52	*
Microphone Mixer	Anatoly I. Shikhatov	235,600		26	*
Mono To Stereo Synthesizer	oRbEq	118,571		18	*
One Tube Regenerative Radio NEW!		121,270		4	*
Op Amp Radio		367,533		80	*
Single Chip AM Radio NEW!		89,675		2	*
Single Chip FM Radio NEW!		156,080		1	*
Sound Level Meter		326,048		51	*
Stereo Tube Amplifier	Weslee Kinsler	253,028		15	*
Tone Control		291,627		31
Transistor Organ		183,061		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		151,789		27	*
FM Telephone Bug		223,825		57
Phone Busy Indicator		202,030		24	*
Remote Telephone Ringer		107,036		3	*
Ringing Phone Light Flasher		200,459		35	*
Simple Phone Tap	Derek Tombrello	370,892		98	*
Telephone Hold Button		116,713		10
Telephone Recorder		203,280		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.