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, July 07, 2020	Simple Phone Tap	5,137
	12VDC To 120VAC Inverter	22
Yesterday Monday, July 06, 2020	Simple Phone Tap	11,278
	12VDC To 120VAC Inverter	41
Of All Time	12VDC To 120VAC Inverter	1,467,434
	FM Transmitter	969,795

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		210,114		61	*
Car Alarm Arming Horn Beep Canceller	bob	121,243		6	*
Wireless Auto Tachometer		323,258		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	146,602		29	*
Parallel (Printer) Port Interface		263,501		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		423,096		63	*
3 Channel Spectrum Analyzer		203,540		20
40W Fluorescent Lamp Inverter	Bart Milnes	312,194		60	*
Adjustable Strobe Light		287,730		36
Black Light		252,452		29
Colour (Sound) Organ		269,908		36
Electronic Dice NEW!		171,629		10	*
Fantastic Atom Expander		184,610		25
Flash Slave Trigger		202,152		18	*
Infa-Red Remote Control		611,848		216	*
IR Remote Extender NEW!		113,655		2	*
IR Remote Jammer	Carl	244,561		110	*
IR Remote Switch NEW!		141,995		9	*
LASER Transmitter/Receiver		389,032		92
LED Chaser		426,404		83	*
LED Metronome NEW!		88,978		3	*
LED Thermometer		192,557		22	*
Light/Dark Detector		290,700		90	*
Simple Colour Organ		124,730		10	*
Strobe Light		259,031		27	*
TRIAC Light Dimmer		481,309		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		339,150		122	*
Electromagnetic Levitator NEW!		129,311		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		895,082		214	*
AC Motor Speed Controller		365,831		29	*
Air Flow Detector		236,457		54	*
Digital Keypad Combination Lock		181,994		20
Low Voltage Alarm		211,472		58	*
Pine Racecar Victory Judge		90,516		1	*
Pulse Width Modulation DC Motor Control		629,606		94
Rain Detector		289,613		112	*
Simple Lie Detector		542,160		323
Simple Polarity Tester	Dudley LeRoux	148,821		13	*
Simple Servo Controller		204,957		22	*
Simple Touch Switch NEW!		154,649		5	*
Simple Two Speed Contactor DC Motor Controller		189,955		21	*
Stepper Motor Controller		718,554		120	*
Time Delay Relay		537,940		88
Time Delay Relay II	jawaharlal@excite.com	227,102		39	*
Touch Switch		273,532		51	*
Video Activated Relay		108,473		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	164,200		10	*
Water Detector With Sump/Bilge Pump Controller		135,344		18	*
Wire Loop Alarm	Alex Meaden	191,486		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		293,982		25	*
12VDC To 120VAC Inverter		1,467,434		689
6V to 12V Converter		499,142		121
Automatic 12V Lead Acid Battery Charger		907,791		247
Automatic Load Sensing Power Switch		149,905		16	*
Car Battery Charger		858,513		159	*
Dual Polarity Power Supply		354,656		84	*
Fixed Voltage Power Supply		293,461		52	*
High Current Power Supply		317,568		65	*
High Voltage High Current Power Supply		236,855		35	*
LASER Power Supply		276,681		28
Portable CD Player Adapter For Car		195,325		12	*
Power Supply		715,713		259	*
Solid State Tesla Coil NEW!		130,695		4
Solid State Tesla Coil/High Voltage Generator		417,243		50
Transformerless Power Supply		443,717		117	*
Voltage Inverter		317,218		51	*
Voltage Inverter II		186,138		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		565,864		182
3 Watt FM Transmitter	Rae XL Tkacik	314,420		82	*
50 Watt Amplifier		487,242		74
8 Note Tune Player		127,666		12	*
8 Watt Audio Amp		351,207		67	*
Aircraft Radio Communications Receiver		257,810		49	*
Crystal Radio		147,823		53	*
Digital Volume Control		314,729		47	*
Electronic Stethoscope		293,431		141	*
FET Audio Mixer		323,818		41
FM Transmitter		969,795		419
Guitar Fuzz Effect		227,213		52	*
Microphone Mixer	Anatoly I. Shikhatov	233,665		26	*
Mono To Stereo Synthesizer	oRbEq	116,575		18	*
One Tube Regenerative Radio NEW!		119,480		4	*
Op Amp Radio		365,181		80	*
Single Chip AM Radio NEW!		88,563		2	*
Single Chip FM Radio NEW!		153,935		1	*
Sound Level Meter		324,138		51	*
Stereo Tube Amplifier	Weslee Kinsler	251,131		15	*
Tone Control		289,296		31
Transistor Organ		181,117		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		150,106		27	*
FM Telephone Bug		221,857		57
Phone Busy Indicator		200,422		24	*
Remote Telephone Ringer		105,154		3	*
Ringing Phone Light Flasher		198,435		35	*
Simple Phone Tap	Derek Tombrello	368,855		98	*
Telephone Hold Button		115,144		10
Telephone Recorder		201,340		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.