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 25, 2020	AC Motor Speed Controller	44
	Car Battery Charger	42
Yesterday Thursday, September 24, 2020	12VDC To 120VAC Inverter	41
	Car Battery Charger	31
Of All Time	12VDC To 120VAC Inverter	1,471,135
	FM Transmitter	971,831

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		211,836		61	*
Car Alarm Arming Horn Beep Canceller	bob	122,906		6	*
Wireless Auto Tachometer		325,081		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	147,955		29	*
Parallel (Printer) Port Interface		265,620		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		425,361		63	*
3 Channel Spectrum Analyzer		205,172		20
40W Fluorescent Lamp Inverter	Bart Milnes	313,820		60	*
Adjustable Strobe Light		289,744		36
Black Light		254,692		29
Colour (Sound) Organ		271,783		36
Electronic Dice NEW!		173,183		10	*
Fantastic Atom Expander		186,279		25
Flash Slave Trigger		203,982		18	*
Infa-Red Remote Control		613,611		216	*
IR Remote Extender NEW!		115,723		2	*
IR Remote Jammer	Carl	245,938		110	*
IR Remote Switch NEW!		143,577		9	*
LASER Transmitter/Receiver		391,097		92
LED Chaser		427,754		83	*
LED Metronome NEW!		90,069		3	*
LED Thermometer		193,801		22	*
Light/Dark Detector		292,311		90	*
Simple Colour Organ		126,074		10	*
Strobe Light		260,309		27	*
TRIAC Light Dimmer		533,366		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		341,331		122	*
Electromagnetic Levitator NEW!		130,909		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		897,695		214	*
AC Motor Speed Controller		367,593		29	*
Air Flow Detector		237,999		54	*
Digital Keypad Combination Lock		183,450		20
Low Voltage Alarm		212,815		58	*
Pine Racecar Victory Judge		91,896		1	*
Pulse Width Modulation DC Motor Control		631,028		94
Rain Detector		290,886		112	*
Simple Lie Detector		543,689		323
Simple Polarity Tester	Dudley LeRoux	150,327		13	*
Simple Servo Controller		206,238		22	*
Simple Touch Switch NEW!		156,081		5	*
Simple Two Speed Contactor DC Motor Controller		191,446		21	*
Stepper Motor Controller		720,748		120	*
Time Delay Relay		539,433		88
Time Delay Relay II	jawaharlal@excite.com	228,658		39	*
Touch Switch		275,116		51	*
Video Activated Relay		109,656		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	165,561		10	*
Water Detector With Sump/Bilge Pump Controller		137,706		18	*
Wire Loop Alarm	Alex Meaden	192,934		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		295,769		25	*
12VDC To 120VAC Inverter		1,471,135		689
6V to 12V Converter		503,092		121
Automatic 12V Lead Acid Battery Charger		910,044		247
Automatic Load Sensing Power Switch		151,438		16	*
Car Battery Charger		860,751		159	*
Dual Polarity Power Supply		355,733		84	*
Fixed Voltage Power Supply		294,849		52	*
High Current Power Supply		319,134		65	*
High Voltage High Current Power Supply		238,160		35	*
LASER Power Supply		278,106		28
Portable CD Player Adapter For Car		196,938		12	*
Power Supply		717,489		259	*
Solid State Tesla Coil NEW!		131,810		4
Solid State Tesla Coil/High Voltage Generator		419,676		50
Transformerless Power Supply		445,603		117	*
Voltage Inverter		318,530		51	*
Voltage Inverter II		187,537		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		567,820		182
3 Watt FM Transmitter	Rae XL Tkacik	316,200		82	*
50 Watt Amplifier		488,893		74
8 Note Tune Player		128,821		12	*
8 Watt Audio Amp		353,343		67	*
Aircraft Radio Communications Receiver		259,226		49	*
Crystal Radio		148,827		53	*
Digital Volume Control		316,388		47	*
Electronic Stethoscope		295,086		141	*
FET Audio Mixer		325,488		41
FM Transmitter		971,831		419
Guitar Fuzz Effect		228,698		52	*
Microphone Mixer	Anatoly I. Shikhatov	235,066		26	*
Mono To Stereo Synthesizer	oRbEq	118,029		18	*
One Tube Regenerative Radio NEW!		120,809		4	*
Op Amp Radio		366,868		80	*
Single Chip AM Radio NEW!		89,345		2	*
Single Chip FM Radio NEW!		155,541		1	*
Sound Level Meter		325,486		51	*
Stereo Tube Amplifier	Weslee Kinsler	252,523		15	*
Tone Control		290,986		31
Transistor Organ		182,477		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		151,372		27	*
FM Telephone Bug		223,343		57
Phone Busy Indicator		201,573		24	*
Remote Telephone Ringer		106,597		3	*
Ringing Phone Light Flasher		199,919		35	*
Simple Phone Tap	Derek Tombrello	370,441		98	*
Telephone Hold Button		116,277		10
Telephone Recorder		202,819		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.