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 Friday, September 20, 2019	12VDC To 120VAC Inverter	9
	8 Watt Audio Amp	6
Yesterday Thursday, September 19, 2019	Automatic 12V Lead Acid Battery Charger	71
	12VDC To 120VAC Inverter	70
Of All Time	12VDC To 120VAC Inverter	1,447,922
	FM Transmitter	956,648

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		200,673		61	*
Car Alarm Arming Horn Beep Canceller	bob	111,829		6	*
Wireless Auto Tachometer		311,602		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	140,037		29	*
Parallel (Printer) Port Interface		251,749		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		407,856		63	*
3 Channel Spectrum Analyzer		195,884		20
40W Fluorescent Lamp Inverter	Bart Milnes	301,307		60	*
Adjustable Strobe Light		276,735		36
Black Light		239,665		29
Colour (Sound) Organ		259,340		36
Electronic Dice NEW!		161,693		10	*
Fantastic Atom Expander		173,824		25
Flash Slave Trigger		192,442		18	*
Infa-Red Remote Control		598,432		216	*
IR Remote Extender NEW!		102,592		2	*
IR Remote Jammer	Carl	235,438		110	*
IR Remote Switch NEW!		132,223		9	*
LASER Transmitter/Receiver		377,315		92
LED Chaser		418,388		83	*
LED Metronome NEW!		85,911		3	*
LED Thermometer		185,136		22	*
Light/Dark Detector		283,113		90	*
Simple Colour Organ		118,651		10	*
Strobe Light		251,905		27	*
TRIAC Light Dimmer		468,837		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		325,567		122	*
Electromagnetic Levitator NEW!		122,375		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		880,572		214	*
AC Motor Speed Controller		355,776		29	*
Air Flow Detector		229,388		54	*
Digital Keypad Combination Lock		174,526		20
Low Voltage Alarm		203,531		58	*
Pine Racecar Victory Judge		84,242		1	*
Pulse Width Modulation DC Motor Control		621,126		93
Rain Detector		282,791		112	*
Simple Lie Detector		532,969		323
Simple Polarity Tester	Dudley LeRoux	138,852		13	*
Simple Servo Controller		197,409		22	*
Simple Touch Switch NEW!		148,210		5	*
Simple Two Speed Contactor DC Motor Controller		182,868		21	*
Stepper Motor Controller		707,506		120	*
Time Delay Relay		526,745		88
Time Delay Relay II	jawaharlal@excite.com	216,954		39	*
Touch Switch		265,865		51	*
Video Activated Relay		102,310		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	156,590		10	*
Water Detector With Sump/Bilge Pump Controller		127,996		18	*
Wire Loop Alarm	Alex Meaden	185,025		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		284,435		25	*
12VDC To 120VAC Inverter		1,447,922		688
6V to 12V Converter		471,002		121
Automatic 12V Lead Acid Battery Charger		893,346		246
Automatic Load Sensing Power Switch		142,188		16	*
Car Battery Charger		845,552		159	*
Dual Polarity Power Supply		348,831		84	*
Fixed Voltage Power Supply		286,187		52	*
High Current Power Supply		307,368		65	*
High Voltage High Current Power Supply		229,508		35	*
LASER Power Supply		267,633		28
Portable CD Player Adapter For Car		187,870		12	*
Power Supply		704,412		259	*
Solid State Tesla Coil NEW!		125,766		4
Solid State Tesla Coil/High Voltage Generator		405,869		50
Transformerless Power Supply		434,791		117	*
Voltage Inverter		311,587		51	*
Voltage Inverter II		179,555		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		556,972		182
3 Watt FM Transmitter	Rae XL Tkacik	305,767		82	*
50 Watt Amplifier		477,590		74
8 Note Tune Player		121,438		12	*
8 Watt Audio Amp		342,119		67	*
Aircraft Radio Communications Receiver		245,674		49	*
Crystal Radio		143,700		53	*
Digital Volume Control		306,738		47	*
Electronic Stethoscope		284,325		141	*
FET Audio Mixer		315,351		41
FM Transmitter		956,648		419
Guitar Fuzz Effect		218,781		52	*
Microphone Mixer	Anatoly I. Shikhatov	225,395		26	*
Mono To Stereo Synthesizer	oRbEq	108,684		18	*
One Tube Regenerative Radio NEW!		114,167		4	*
Op Amp Radio		355,529		80	*
Single Chip AM Radio NEW!		85,090		2	*
Single Chip FM Radio NEW!		145,518		1	*
Sound Level Meter		316,183		51	*
Stereo Tube Amplifier	Weslee Kinsler	243,388		15	*
Tone Control		280,491		31
Transistor Organ		172,999		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		143,595		27	*
FM Telephone Bug		214,895		57
Phone Busy Indicator		193,686		24	*
Remote Telephone Ringer		99,031		3	*
Ringing Phone Light Flasher		190,296		34	*
Simple Phone Tap	Derek Tombrello	342,177		98	*
Telephone Hold Button		108,013		10
Telephone Recorder		191,440		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.