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 Saturday, July 20, 2019	6V to 12V Converter	25
	Car Battery Charger	23
Yesterday Friday, July 19, 2019	12VDC To 120VAC Inverter	54
	12VDC To 120VAC Inverter	54
Of All Time	12VDC To 120VAC Inverter	1,444,198
	FM Transmitter	954,195

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		199,805		61	*
Car Alarm Arming Horn Beep Canceller	bob	110,977		6	*
Wireless Auto Tachometer		309,825		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	139,203		29	*
Parallel (Printer) Port Interface		249,644		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		406,348		63	*
3 Channel Spectrum Analyzer		194,833		20
40W Fluorescent Lamp Inverter	Bart Milnes	300,112		60	*
Adjustable Strobe Light		275,516		36
Black Light		238,007		29
Colour (Sound) Organ		258,200		36
Electronic Dice NEW!		160,602		10	*
Fantastic Atom Expander		172,605		25
Flash Slave Trigger		191,428		18	*
Infa-Red Remote Control		596,896		216	*
IR Remote Extender NEW!		101,487		2	*
IR Remote Jammer	Carl	234,338		110	*
IR Remote Switch NEW!		131,092		9	*
LASER Transmitter/Receiver		375,851		92
LED Chaser		416,888		83	*
LED Metronome NEW!		85,222		3	*
LED Thermometer		184,056		22	*
Light/Dark Detector		282,125		90	*
Simple Colour Organ		117,954		10	*
Strobe Light		250,968		27	*
TRIAC Light Dimmer		466,627		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		323,679		122	*
Electromagnetic Levitator NEW!		121,521		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		877,851		214	*
AC Motor Speed Controller		353,836		29	*
Air Flow Detector		228,434		54	*
Digital Keypad Combination Lock		173,003		20
Low Voltage Alarm		202,419		58	*
Pine Racecar Victory Judge		83,065		1	*
Pulse Width Modulation DC Motor Control		619,869		93
Rain Detector		281,883		112	*
Simple Lie Detector		531,177		323
Simple Polarity Tester	Dudley LeRoux	137,757		13	*
Simple Servo Controller		195,977		22	*
Simple Touch Switch NEW!		147,363		5	*
Simple Two Speed Contactor DC Motor Controller		181,980		21	*
Stepper Motor Controller		705,896		120	*
Time Delay Relay		524,920		88
Time Delay Relay II	jawaharlal@excite.com	215,873		39	*
Touch Switch		264,884		51	*
Video Activated Relay		101,543		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	155,406		10	*
Water Detector With Sump/Bilge Pump Controller		127,133		18	*
Wire Loop Alarm	Alex Meaden	184,158		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		282,537		25	*
12VDC To 120VAC Inverter		1,444,198		688
6V to 12V Converter		467,991		121
Automatic 12V Lead Acid Battery Charger		890,727		246
Automatic Load Sensing Power Switch		141,094		16	*
Car Battery Charger		843,191		159	*
Dual Polarity Power Supply		347,819		84	*
Fixed Voltage Power Supply		285,220		52	*
High Current Power Supply		305,671		65	*
High Voltage High Current Power Supply		228,574		35	*
LASER Power Supply		265,939		28
Portable CD Player Adapter For Car		186,907		12	*
Power Supply		702,205		259	*
Solid State Tesla Coil NEW!		124,694		4
Solid State Tesla Coil/High Voltage Generator		403,740		50
Transformerless Power Supply		433,121		117	*
Voltage Inverter		310,594		51	*
Voltage Inverter II		178,764		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		555,661		182
3 Watt FM Transmitter	Rae XL Tkacik	304,473		82	*
50 Watt Amplifier		476,114		74
8 Note Tune Player		120,698		12	*
8 Watt Audio Amp		340,340		67	*
Aircraft Radio Communications Receiver		244,010		49	*
Crystal Radio		142,570		53	*
Digital Volume Control		305,322		47	*
Electronic Stethoscope		282,932		141	*
FET Audio Mixer		314,283		41
FM Transmitter		954,195		419
Guitar Fuzz Effect		217,201		52	*
Microphone Mixer	Anatoly I. Shikhatov	223,794		26	*
Mono To Stereo Synthesizer	oRbEq	107,375		18	*
One Tube Regenerative Radio NEW!		112,506		4	*
Op Amp Radio		354,051		80	*
Single Chip AM Radio NEW!		84,346		2	*
Single Chip FM Radio NEW!		143,829		1	*
Sound Level Meter		314,699		51	*
Stereo Tube Amplifier	Weslee Kinsler	241,873		15	*
Tone Control		278,807		31
Transistor Organ		171,582		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		142,823		27	*
FM Telephone Bug		213,577		57
Phone Busy Indicator		192,350		24	*
Remote Telephone Ringer		98,388		3	*
Ringing Phone Light Flasher		189,209		34	*
Simple Phone Tap	Derek Tombrello	338,853		98	*
Telephone Hold Button		106,724		10
Telephone Recorder		190,347		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.