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 Monday, March 25, 2019	Time Delay Relay II	21
	Power Supply	21
Yesterday Sunday, March 24, 2019	Solid State Tesla Coil/High Voltage Generator	68
	Car Battery Charger	67
Of All Time	12VDC To 120VAC Inverter	1,432,026
	FM Transmitter	947,689

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		196,886		61	*
Car Alarm Arming Horn Beep Canceller	bob	108,056		6	*
Wireless Auto Tachometer		305,415		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	137,044		29	*
Parallel (Printer) Port Interface		244,904		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		401,664		63	*
3 Channel Spectrum Analyzer		192,127		20
40W Fluorescent Lamp Inverter	Bart Milnes	296,780		60	*
Adjustable Strobe Light		271,848		36
Black Light		233,403		29
Colour (Sound) Organ		254,605		36
Electronic Dice NEW!		157,200		10	*
Fantastic Atom Expander		169,096		25
Flash Slave Trigger		188,246		18	*
Infa-Red Remote Control		592,911		216	*
IR Remote Extender NEW!		98,080		2	*
IR Remote Jammer	Carl	231,735		110	*
IR Remote Switch NEW!		128,017		9	*
LASER Transmitter/Receiver		371,782		92
LED Chaser		413,982		83	*
LED Metronome NEW!		83,730		3	*
LED Thermometer		181,697		22	*
Light/Dark Detector		279,701		90	*
Simple Colour Organ		116,031		10	*
Strobe Light		248,785		27	*
TRIAC Light Dimmer		462,653		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		319,733		122	*
Electromagnetic Levitator NEW!		118,859		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		871,265		214	*
AC Motor Speed Controller		349,628		29	*
Air Flow Detector		225,965		54	*
Digital Keypad Combination Lock		170,062		20
Low Voltage Alarm		199,880		58	*
Pine Racecar Victory Judge		80,649		1	*
Pulse Width Modulation DC Motor Control		616,667		93
Rain Detector		279,469		112	*
Simple Lie Detector		527,333		323
Simple Polarity Tester	Dudley LeRoux	134,528		13	*
Simple Servo Controller		192,195		22	*
Simple Touch Switch NEW!		145,132		5	*
Simple Two Speed Contactor DC Motor Controller		179,660		21	*
Stepper Motor Controller		701,032		120	*
Time Delay Relay		521,391		88
Time Delay Relay II	jawaharlal@excite.com	211,973		39	*
Touch Switch		262,457		51	*
Video Activated Relay		99,578		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	152,512		10	*
Water Detector With Sump/Bilge Pump Controller		125,085		18	*
Wire Loop Alarm	Alex Meaden	181,963		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		278,129		25	*
12VDC To 120VAC Inverter		1,432,026		688
6V to 12V Converter		460,611		121
Automatic 12V Lead Acid Battery Charger		884,704		246
Automatic Load Sensing Power Switch		138,549		16	*
Car Battery Charger		838,102		159	*
Dual Polarity Power Supply		345,262		84	*
Fixed Voltage Power Supply		282,693		52	*
High Current Power Supply		301,925		65	*
High Voltage High Current Power Supply		226,206		35	*
LASER Power Supply		261,489		28
Portable CD Player Adapter For Car		184,429		12	*
Power Supply		697,659		259	*
Solid State Tesla Coil NEW!		122,797		4
Solid State Tesla Coil/High Voltage Generator		398,625		50
Transformerless Power Supply		425,024		117	*
Voltage Inverter		308,048		51	*
Voltage Inverter II		176,721		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		552,412		182
3 Watt FM Transmitter	Rae XL Tkacik	301,511		82	*
50 Watt Amplifier		472,035		74
8 Note Tune Player		118,774		12	*
8 Watt Audio Amp		336,451		67	*
Aircraft Radio Communications Receiver		240,074		49	*
Crystal Radio		140,523		53	*
Digital Volume Control		302,079		47	*
Electronic Stethoscope		279,723		141	*
FET Audio Mixer		311,196		41
FM Transmitter		947,689		419
Guitar Fuzz Effect		213,397		52	*
Microphone Mixer	Anatoly I. Shikhatov	220,410		26	*
Mono To Stereo Synthesizer	oRbEq	104,490		18	*
One Tube Regenerative Radio NEW!		109,821		4	*
Op Amp Radio		350,515		80	*
Single Chip AM Radio NEW!		82,962		2	*
Single Chip FM Radio NEW!		140,237		1	*
Sound Level Meter		310,688		51	*
Stereo Tube Amplifier	Weslee Kinsler	238,381		15	*
Tone Control		275,094		31
Transistor Organ		168,452		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		140,759		27	*
FM Telephone Bug		209,816		57
Phone Busy Indicator		189,572		24	*
Remote Telephone Ringer		96,439		3	*
Ringing Phone Light Flasher		186,394		34	*
Simple Phone Tap	Derek Tombrello	335,766		98	*
Telephone Hold Button		103,476		10
Telephone Recorder		187,456		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.