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 Tuesday, February 25, 2020	12VDC Fluorescent Lamp Driver	31
	Automatic Headlight Brightness Switch	26
Yesterday Monday, February 24, 2020	12VDC Fluorescent Lamp Driver	106
	IR Remote Switch	67
Of All Time	12VDC To 120VAC Inverter	1,458,061
	FM Transmitter	963,457

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		204,954		61	*
Car Alarm Arming Horn Beep Canceller	bob	116,007		6	*
Wireless Auto Tachometer		317,419		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	143,218		29	*
Parallel (Printer) Port Interface		257,432		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		414,969		63	*
3 Channel Spectrum Analyzer		199,666		20
40W Fluorescent Lamp Inverter	Bart Milnes	306,818		60	*
Adjustable Strobe Light		281,758		36
Black Light		245,748		29
Colour (Sound) Organ		264,313		36
Electronic Dice NEW!		166,342		10	*
Fantastic Atom Expander		178,698		25
Flash Slave Trigger		196,671		18	*
Infa-Red Remote Control		604,418		216	*
IR Remote Extender NEW!		107,807		2	*
IR Remote Jammer	Carl	239,692		110	*
IR Remote Switch NEW!		136,878		9	*
LASER Transmitter/Receiver		382,894		92
LED Chaser		422,359		83	*
LED Metronome NEW!		87,656		3	*
LED Thermometer		188,716		22	*
Light/Dark Detector		286,787		90	*
Simple Colour Organ		121,380		10	*
Strobe Light		255,200		27	*
TRIAC Light Dimmer		476,393		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		330,709		122	*
Electromagnetic Levitator NEW!		125,663		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		888,014		214	*
AC Motor Speed Controller		361,153		29	*
Air Flow Detector		232,646		54	*
Digital Keypad Combination Lock		178,322		20
Low Voltage Alarm		207,501		58	*
Pine Racecar Victory Judge		87,323		1	*
Pulse Width Modulation DC Motor Control		625,298		94
Rain Detector		285,956		112	*
Simple Lie Detector		537,780		323
Simple Polarity Tester	Dudley LeRoux	143,233		13	*
Simple Servo Controller		201,185		22	*
Simple Touch Switch NEW!		151,189		5	*
Simple Two Speed Contactor DC Motor Controller		186,348		21	*
Stepper Motor Controller		713,098		120	*
Time Delay Relay		532,806		88
Time Delay Relay II	jawaharlal@excite.com	221,428		39	*
Touch Switch		269,533		51	*
Video Activated Relay		105,119		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	160,231		10	*
Water Detector With Sump/Bilge Pump Controller		131,223		18	*
Wire Loop Alarm	Alex Meaden	188,036		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		289,528		25	*
12VDC To 120VAC Inverter		1,458,061		689
6V to 12V Converter		484,424		121
Automatic 12V Lead Acid Battery Charger		901,090		247
Automatic Load Sensing Power Switch		146,026		16	*
Car Battery Charger		852,454		159	*
Dual Polarity Power Supply		352,313		84	*
Fixed Voltage Power Supply		289,714		52	*
High Current Power Supply		312,075		65	*
High Voltage High Current Power Supply		232,910		35	*
LASER Power Supply		272,427		28
Portable CD Player Adapter For Car		191,318		12	*
Power Supply		710,391		259	*
Solid State Tesla Coil NEW!		128,501		4
Solid State Tesla Coil/High Voltage Generator		411,664		50
Transformerless Power Supply		439,310		117	*
Voltage Inverter		314,524		51	*
Voltage Inverter II		182,612		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		561,144		182
3 Watt FM Transmitter	Rae XL Tkacik	310,337		82	*
50 Watt Amplifier		482,511		74
8 Note Tune Player		124,185		12	*
8 Watt Audio Amp		346,723		67	*
Aircraft Radio Communications Receiver		253,576		49	*
Crystal Radio		145,981		53	*
Digital Volume Control		310,817		47	*
Electronic Stethoscope		288,883		141	*
FET Audio Mixer		319,337		41
FM Transmitter		963,457		419
Guitar Fuzz Effect		223,006		52	*
Microphone Mixer	Anatoly I. Shikhatov	229,744		26	*
Mono To Stereo Synthesizer	oRbEq	112,646		18	*
One Tube Regenerative Radio NEW!		117,401		4	*
Op Amp Radio		359,603		80	*
Single Chip AM Radio NEW!		87,036		2	*
Single Chip FM Radio NEW!		150,017		1	*
Sound Level Meter		320,243		51	*
Stereo Tube Amplifier	Weslee Kinsler	247,483		15	*
Tone Control		284,986		31
Transistor Organ		177,023		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		146,546		27	*
FM Telephone Bug		218,281		57
Phone Busy Indicator		197,107		24	*
Remote Telephone Ringer		101,691		3	*
Ringing Phone Light Flasher		194,322		35	*
Simple Phone Tap	Derek Tombrello	348,257		98	*
Telephone Hold Button		111,544		10
Telephone Recorder		196,655		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.