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, November 17, 2018	Dual Polarity Power Supply	44
	Stepper Motor Controller	37
Yesterday Friday, November 16, 2018	7 Segment LED Counter	80
	Car Battery Charger	80
Of All Time	12VDC To 120VAC Inverter	1,422,130
	FM Transmitter	940,807

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		193,354		61	*
Car Alarm Arming Horn Beep Canceller	bob	104,752		6	*
Wireless Auto Tachometer		300,188		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	134,657		29	*
Parallel (Printer) Port Interface		238,929		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		396,527		63	*
3 Channel Spectrum Analyzer		189,239		20
40W Fluorescent Lamp Inverter	Bart Milnes	293,017		60	*
Adjustable Strobe Light		267,460		36
Black Light		229,201		29
Colour (Sound) Organ		250,824		36
Electronic Dice NEW!		153,658		10	*
Fantastic Atom Expander		165,264		25
Flash Slave Trigger		185,006		18	*
Infa-Red Remote Control		586,877		216	*
IR Remote Extender NEW!		94,380		2	*
IR Remote Jammer	Carl	228,805		110	*
IR Remote Switch NEW!		124,526		9	*
LASER Transmitter/Receiver		367,467		92
LED Chaser		410,709		83	*
LED Metronome NEW!		82,446		3	*
LED Thermometer		179,184		22	*
Light/Dark Detector		277,277		90	*
Simple Colour Organ		113,681		10	*
Strobe Light		246,162		27	*
TRIAC Light Dimmer		458,493		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		315,319		122	*
Electromagnetic Levitator NEW!		115,904		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		863,781		214	*
AC Motor Speed Controller		343,867		29	*
Air Flow Detector		223,025		54	*
Digital Keypad Combination Lock		166,424		20
Low Voltage Alarm		196,800		58	*
Pine Racecar Victory Judge		77,953		1	*
Pulse Width Modulation DC Motor Control		613,216		93
Rain Detector		276,186		112	*
Simple Lie Detector		522,010		323
Simple Polarity Tester	Dudley LeRoux	131,299		13	*
Simple Servo Controller		186,537		22	*
Simple Touch Switch NEW!		142,365		5	*
Simple Two Speed Contactor DC Motor Controller		177,215		21	*
Stepper Motor Controller		692,564		120	*
Time Delay Relay		516,904		88
Time Delay Relay II	jawaharlal@excite.com	208,859		39	*
Touch Switch		259,696		51	*
Video Activated Relay		97,141		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	149,045		10	*
Water Detector With Sump/Bilge Pump Controller		122,726		18	*
Wire Loop Alarm	Alex Meaden	179,547		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		272,160		25	*
12VDC To 120VAC Inverter		1,422,130		688
6V to 12V Converter		454,837		121
Automatic 12V Lead Acid Battery Charger		877,716		246
Automatic Load Sensing Power Switch		135,687		16	*
Car Battery Charger		830,709		159	*
Dual Polarity Power Supply		335,591		84	*
Fixed Voltage Power Supply		279,808		52	*
High Current Power Supply		297,274		65	*
High Voltage High Current Power Supply		223,331		35	*
LASER Power Supply		255,204		28
Portable CD Player Adapter For Car		181,455		12	*
Power Supply		691,475		259	*
Solid State Tesla Coil NEW!		120,734		4
Solid State Tesla Coil/High Voltage Generator		391,833		50
Transformerless Power Supply		421,056		117	*
Voltage Inverter		305,990		51	*
Voltage Inverter II		174,494		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		548,676		182
3 Watt FM Transmitter	Rae XL Tkacik	298,027		82	*
50 Watt Amplifier		466,057		74
8 Note Tune Player		116,647		12	*
8 Watt Audio Amp		331,178		67	*
Aircraft Radio Communications Receiver		235,131		49	*
Crystal Radio		137,609		53	*
Digital Volume Control		298,459		47	*
Electronic Stethoscope		275,910		141	*
FET Audio Mixer		307,758		41
FM Transmitter		940,807		419
Guitar Fuzz Effect		207,868		52	*
Microphone Mixer	Anatoly I. Shikhatov	216,703		26	*
Mono To Stereo Synthesizer	oRbEq	100,096		18	*
One Tube Regenerative Radio NEW!		106,316		4	*
Op Amp Radio		346,863		80	*
Single Chip AM Radio NEW!		81,409		2	*
Single Chip FM Radio NEW!		135,448		1	*
Sound Level Meter		306,293		51	*
Stereo Tube Amplifier	Weslee Kinsler	234,057		15	*
Tone Control		270,462		31
Transistor Organ		164,910		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		138,535		27	*
FM Telephone Bug		204,193		57
Phone Busy Indicator		186,064		24	*
Remote Telephone Ringer		94,386		3	*
Ringing Phone Light Flasher		183,535		34	*
Simple Phone Tap	Derek Tombrello	332,119		98	*
Telephone Hold Button		99,071		10
Telephone Recorder		184,770		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.