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, December 11, 2018	Dual Polarity Power Supply	44
	Stepper Motor Controller	34
Yesterday Monday, December 10, 2018	7 Segment LED Counter	117
	Car Battery Charger	82
Of All Time	12VDC To 120VAC Inverter	1,423,984
	FM Transmitter	942,193

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		194,139		61	*
Car Alarm Arming Horn Beep Canceller	bob	105,525		6	*
Wireless Auto Tachometer		301,309		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	135,130		29	*
Parallel (Printer) Port Interface		240,196		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		397,549		63	*
3 Channel Spectrum Analyzer		189,813		20
40W Fluorescent Lamp Inverter	Bart Milnes	293,878		60	*
Adjustable Strobe Light		268,434		36
Black Light		230,058		29
Colour (Sound) Organ		251,592		36
Electronic Dice NEW!		154,353		10	*
Fantastic Atom Expander		166,171		25
Flash Slave Trigger		185,595		18	*
Infa-Red Remote Control		587,968		216	*
IR Remote Extender NEW!		95,109		2	*
IR Remote Jammer	Carl	229,430		110	*
IR Remote Switch NEW!		125,192		9	*
LASER Transmitter/Receiver		368,460		92
LED Chaser		411,528		83	*
LED Metronome NEW!		82,684		3	*
LED Thermometer		179,669		22	*
Light/Dark Detector		277,784		90	*
Simple Colour Organ		114,305		10	*
Strobe Light		246,810		27	*
TRIAC Light Dimmer		459,362		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		316,140		122	*
Electromagnetic Levitator NEW!		116,590		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		865,592		214	*
AC Motor Speed Controller		345,246		29	*
Air Flow Detector		223,707		54	*
Digital Keypad Combination Lock		167,296		20
Low Voltage Alarm		197,600		58	*
Pine Racecar Victory Judge		78,488		1	*
Pulse Width Modulation DC Motor Control		613,908		93
Rain Detector		277,030		112	*
Simple Lie Detector		523,344		323
Simple Polarity Tester	Dudley LeRoux	131,935		13	*
Simple Servo Controller		187,785		22	*
Simple Touch Switch NEW!		143,021		5	*
Simple Two Speed Contactor DC Motor Controller		177,737		21	*
Stepper Motor Controller		694,398		120	*
Time Delay Relay		518,025		88
Time Delay Relay II	jawaharlal@excite.com	209,422		39	*
Touch Switch		260,378		51	*
Video Activated Relay		97,712		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	149,795		10	*
Water Detector With Sump/Bilge Pump Controller		123,304		18	*
Wire Loop Alarm	Alex Meaden	180,115		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		273,472		25	*
12VDC To 120VAC Inverter		1,423,984		688
6V to 12V Converter		456,095		121
Automatic 12V Lead Acid Battery Charger		879,210		246
Automatic Load Sensing Power Switch		136,267		16	*
Car Battery Charger		832,342		159	*
Dual Polarity Power Supply		338,017		84	*
Fixed Voltage Power Supply		280,351		52	*
High Current Power Supply		298,316		65	*
High Voltage High Current Power Supply		223,933		35	*
LASER Power Supply		256,617		28
Portable CD Player Adapter For Car		182,105		12	*
Power Supply		692,901		259	*
Solid State Tesla Coil NEW!		121,176		4
Solid State Tesla Coil/High Voltage Generator		393,288		50
Transformerless Power Supply		421,958		117	*
Voltage Inverter		306,410		51	*
Voltage Inverter II		174,990		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		549,503		182
3 Watt FM Transmitter	Rae XL Tkacik	298,791		82	*
50 Watt Amplifier		467,362		74
8 Note Tune Player		117,117		12	*
8 Watt Audio Amp		332,299		67	*
Aircraft Radio Communications Receiver		236,146		49	*
Crystal Radio		138,258		53	*
Digital Volume Control		299,166		47	*
Electronic Stethoscope		276,657		141	*
FET Audio Mixer		308,398		41
FM Transmitter		942,193		419
Guitar Fuzz Effect		209,161		52	*
Microphone Mixer	Anatoly I. Shikhatov	217,516		26	*
Mono To Stereo Synthesizer	oRbEq	101,121		18	*
One Tube Regenerative Radio NEW!		107,056		4	*
Op Amp Radio		347,587		80	*
Single Chip AM Radio NEW!		81,717		2	*
Single Chip FM Radio NEW!		136,503		1	*
Sound Level Meter		307,279		51	*
Stereo Tube Amplifier	Weslee Kinsler	234,961		15	*
Tone Control		271,412		31
Transistor Organ		165,647		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		138,975		27	*
FM Telephone Bug		205,846		57
Phone Busy Indicator		186,873		24	*
Remote Telephone Ringer		94,826		3	*
Ringing Phone Light Flasher		184,135		34	*
Simple Phone Tap	Derek Tombrello	332,907		98	*
Telephone Hold Button		100,057		10
Telephone Recorder		185,301		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.