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 Sunday, September 15, 2019	6V to 12V Converter	59
	AC Motor Speed Controller	52
Yesterday Saturday, September 14, 2019	12VDC To 120VAC Inverter	48
	7 Segment LED Counter	46
Of All Time	12VDC To 120VAC Inverter	1,447,615
	FM Transmitter	956,466

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		200,616		61	*
Car Alarm Arming Horn Beep Canceller	bob	111,772		6	*
Wireless Auto Tachometer		311,456		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	139,976		29	*
Parallel (Printer) Port Interface		251,609		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		407,744		63	*
3 Channel Spectrum Analyzer		195,808		20
40W Fluorescent Lamp Inverter	Bart Milnes	301,210		60	*
Adjustable Strobe Light		276,642		36
Black Light		239,532		29
Colour (Sound) Organ		259,270		36
Electronic Dice NEW!		161,607		10	*
Fantastic Atom Expander		173,741		25
Flash Slave Trigger		192,367		18	*
Infa-Red Remote Control		598,315		216	*
IR Remote Extender NEW!		102,504		2	*
IR Remote Jammer	Carl	235,373		110	*
IR Remote Switch NEW!		132,138		9	*
LASER Transmitter/Receiver		377,191		92
LED Chaser		418,290		83	*
LED Metronome NEW!		85,859		3	*
LED Thermometer		185,062		22	*
Light/Dark Detector		283,039		90	*
Simple Colour Organ		118,603		10	*
Strobe Light		251,829		27	*
TRIAC Light Dimmer		468,699		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		325,456		122	*
Electromagnetic Levitator NEW!		122,310		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		880,322		214	*
AC Motor Speed Controller		355,620		29	*
Air Flow Detector		229,331		54	*
Digital Keypad Combination Lock		174,427		20
Low Voltage Alarm		203,447		58	*
Pine Racecar Victory Judge		84,166		1	*
Pulse Width Modulation DC Motor Control		621,033		93
Rain Detector		282,708		112	*
Simple Lie Detector		532,841		323
Simple Polarity Tester	Dudley LeRoux	138,773		13	*
Simple Servo Controller		197,306		22	*
Simple Touch Switch NEW!		148,162		5	*
Simple Two Speed Contactor DC Motor Controller		182,806		21	*
Stepper Motor Controller		707,375		120	*
Time Delay Relay		526,610		88
Time Delay Relay II	jawaharlal@excite.com	216,871		39	*
Touch Switch		265,787		51	*
Video Activated Relay		102,256		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	156,507		10	*
Water Detector With Sump/Bilge Pump Controller		127,930		18	*
Wire Loop Alarm	Alex Meaden	184,969		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		284,274		25	*
12VDC To 120VAC Inverter		1,447,615		688
6V to 12V Converter		470,764		121
Automatic 12V Lead Acid Battery Charger		893,105		246
Automatic Load Sensing Power Switch		142,093		16	*
Car Battery Charger		845,375		159	*
Dual Polarity Power Supply		348,756		84	*
Fixed Voltage Power Supply		286,115		52	*
High Current Power Supply		307,228		65	*
High Voltage High Current Power Supply		229,443		35	*
LASER Power Supply		267,513		28
Portable CD Player Adapter For Car		187,801		12	*
Power Supply		704,244		259	*
Solid State Tesla Coil NEW!		125,671		4
Solid State Tesla Coil/High Voltage Generator		405,711		50
Transformerless Power Supply		434,668		117	*
Voltage Inverter		311,511		51	*
Voltage Inverter II		179,504		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		556,880		182
3 Watt FM Transmitter	Rae XL Tkacik	305,685		82	*
50 Watt Amplifier		477,497		74
8 Note Tune Player		121,393		12	*
8 Watt Audio Amp		341,989		67	*
Aircraft Radio Communications Receiver		245,560		49	*
Crystal Radio		143,609		53	*
Digital Volume Control		306,642		47	*
Electronic Stethoscope		284,225		141	*
FET Audio Mixer		315,284		41
FM Transmitter		956,466		419
Guitar Fuzz Effect		218,657		52	*
Microphone Mixer	Anatoly I. Shikhatov	225,261		26	*
Mono To Stereo Synthesizer	oRbEq	108,593		18	*
One Tube Regenerative Radio NEW!		114,029		4	*
Op Amp Radio		355,452		80	*
Single Chip AM Radio NEW!		85,039		2	*
Single Chip FM Radio NEW!		145,378		1	*
Sound Level Meter		316,083		51	*
Stereo Tube Amplifier	Weslee Kinsler	243,285		15	*
Tone Control		280,351		31
Transistor Organ		172,906		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		143,529		27	*
FM Telephone Bug		214,791		57
Phone Busy Indicator		193,602		24	*
Remote Telephone Ringer		98,990		3	*
Ringing Phone Light Flasher		190,240		34	*
Simple Phone Tap	Derek Tombrello	342,083		98	*
Telephone Hold Button		107,933		10
Telephone Recorder		191,370		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.