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 27, 2024	Simple Two Speed Contactor DC Motor Controller	6
	Automatic Load Sensing Power Switch	5
Yesterday Friday, July 26, 2024	12VDC To 120VAC Inverter	40
	FM Transmitter	34
Of All Time	12VDC To 120VAC Inverter	1,535,325
	FM Transmitter	1,012,390

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		228,375		61	*
Car Alarm Arming Horn Beep Canceller	bob	137,863		6	*
Wireless Auto Tachometer		344,673		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	161,175		29	*
Parallel (Printer) Port Interface		288,328		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		449,519		63	*
3 Channel Spectrum Analyzer		223,703		20
40W Fluorescent Lamp Inverter	Bart Milnes	331,666		60	*
Adjustable Strobe Light		310,769		36
Black Light		282,951		29
Colour (Sound) Organ		292,490		36
Electronic Dice NEW!		190,782		10	*
Fantastic Atom Expander		204,401		25
Flash Slave Trigger		222,936		18	*
Infa-Red Remote Control		639,093		216	*
IR Remote Extender NEW!		134,283		3	*
IR Remote Jammer	Carl	268,040		110	*
IR Remote Switch NEW!		159,111		9	*
LASER Transmitter/Receiver		418,922		92
LED Chaser		448,020		83	*
LED Metronome NEW!		100,986		3	*
LED Thermometer		208,262		22	*
Light/Dark Detector		307,580		90	*
Simple Colour Organ		138,836		11	*
Strobe Light		277,260		27	*
TRIAC Light Dimmer		555,124		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		361,256		122	*
Electromagnetic Levitator NEW!		145,868		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		924,630		214	*
AC Motor Speed Controller		393,806		29	*
Air Flow Detector		253,449		54	*
Digital Keypad Combination Lock		203,736		20
Low Voltage Alarm		230,867		58	*
Pine Racecar Victory Judge		104,059		1	*
Pulse Width Modulation DC Motor Control		657,022		94
Rain Detector		306,394		112	*
Simple Lie Detector		566,683		323
Simple Polarity Tester	Dudley LeRoux	167,056		13	*
Simple Servo Controller		223,134		22	*
Simple Touch Switch NEW!		171,571		6	*
Simple Two Speed Contactor DC Motor Controller		206,858		21	*
Stepper Motor Controller		749,112		120	*
Time Delay Relay		557,579		88
Time Delay Relay II	jawaharlal@excite.com	248,968		39	*
Touch Switch		291,466		51	*
Video Activated Relay		123,378		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	183,197		10	*
Water Detector With Sump/Bilge Pump Controller		154,578		18	*
Wire Loop Alarm	Alex Meaden	207,201		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		318,485		25	*
12VDC To 120VAC Inverter		1,535,325		691
6V to 12V Converter		530,013		121
Automatic 12V Lead Acid Battery Charger		939,524		248
Automatic Load Sensing Power Switch		169,150		16	*
Car Battery Charger		885,427		159	*
Dual Polarity Power Supply		373,184		84	*
Fixed Voltage Power Supply		313,141		52	*
High Current Power Supply		341,429		66	*
High Voltage High Current Power Supply		265,858		35	*
LASER Power Supply		298,204		28
Portable CD Player Adapter For Car		213,971		12	*
Power Supply		741,589		259	*
Solid State Tesla Coil NEW!		148,395		4
Solid State Tesla Coil/High Voltage Generator		446,852		51
Transformerless Power Supply		465,284		117	*
Voltage Inverter		341,802		51	*
Voltage Inverter II		205,165		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		587,502		182
3 Watt FM Transmitter	Rae XL Tkacik	337,947		83	*
50 Watt Amplifier		510,186		74
8 Note Tune Player		142,272		12	*
8 Watt Audio Amp		375,657		67	*
Aircraft Radio Communications Receiver		281,023		49	*
Crystal Radio		160,765		53	*
Digital Volume Control		340,602		47	*
Electronic Stethoscope		323,440		142	*
FET Audio Mixer		345,555		41
FM Transmitter		1,012,390		420
Guitar Fuzz Effect		249,716		54	*
Microphone Mixer	Anatoly I. Shikhatov	252,553		26	*
Mono To Stereo Synthesizer	oRbEq	135,845		18	*
One Tube Regenerative Radio NEW!		145,138		4	*
Op Amp Radio		391,690		80	*
Single Chip AM Radio NEW!		101,614		3	*
Single Chip FM Radio NEW!		174,669		1	*
Sound Level Meter		343,975		51	*
Stereo Tube Amplifier	Weslee Kinsler	270,311		15	*
Tone Control		311,756		31
Transistor Organ		201,713		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		165,180		27	*
FM Telephone Bug		236,858		57
Phone Busy Indicator		215,570		24	*
Remote Telephone Ringer		119,816		3	*
Ringing Phone Light Flasher		220,434		35	*
Simple Phone Tap	Derek Tombrello	385,321		98	*
Telephone Hold Button		130,676		10
Telephone Recorder		218,213		55	*

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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.