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 Thursday, January 21, 2021	Automatic 12V Lead Acid Battery Charger	40
	12VDC To 120VAC Inverter	37
Yesterday Wednesday, January 20, 2021	LED Chaser	48
	12VDC To 120VAC Inverter	47
Of All Time	12VDC To 120VAC Inverter	1,478,581
	FM Transmitter	975,389

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		213,905		61	*
Car Alarm Arming Horn Beep Canceller	bob	124,889		6	*
Wireless Auto Tachometer		327,609		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	149,489		29	*
Parallel (Printer) Port Interface		268,291		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		428,752		63	*
3 Channel Spectrum Analyzer		207,204		20
40W Fluorescent Lamp Inverter	Bart Milnes	316,167		60	*
Adjustable Strobe Light		292,448		36
Black Light		257,918		29
Colour (Sound) Organ		274,671		36
Electronic Dice NEW!		175,539		10	*
Fantastic Atom Expander		188,889		25
Flash Slave Trigger		206,309		18	*
Infa-Red Remote Control		617,086		216	*
IR Remote Extender NEW!		118,069		2	*
IR Remote Jammer	Carl	248,855		110	*
IR Remote Switch NEW!		145,743		9	*
LASER Transmitter/Receiver		394,356		92
LED Chaser		430,024		83	*
LED Metronome NEW!		91,066		3	*
LED Thermometer		195,572		22	*
Light/Dark Detector		294,187		90	*
Simple Colour Organ		127,576		10	*
Strobe Light		262,162		27	*
TRIAC Light Dimmer		535,695		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		344,694		122	*
Electromagnetic Levitator NEW!		132,610		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		901,070		214	*
AC Motor Speed Controller		370,256		29	*
Air Flow Detector		239,869		54	*
Digital Keypad Combination Lock		185,151		20
Low Voltage Alarm		214,873		58	*
Pine Racecar Victory Judge		93,323		1	*
Pulse Width Modulation DC Motor Control		633,434		94
Rain Detector		292,601		112	*
Simple Lie Detector		545,881		323
Simple Polarity Tester	Dudley LeRoux	152,515		13	*
Simple Servo Controller		208,187		22	*
Simple Touch Switch NEW!		157,764		5	*
Simple Two Speed Contactor DC Motor Controller		193,075		21	*
Stepper Motor Controller		723,942		120	*
Time Delay Relay		541,573		88
Time Delay Relay II	jawaharlal@excite.com	230,934		39	*
Touch Switch		276,996		51	*
Video Activated Relay		111,219		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	167,485		10	*
Water Detector With Sump/Bilge Pump Controller		140,453		18	*
Wire Loop Alarm	Alex Meaden	194,525		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		298,013		25	*
12VDC To 120VAC Inverter		1,478,581		689
6V to 12V Converter		506,800		121
Automatic 12V Lead Acid Battery Charger		913,532		248
Automatic Load Sensing Power Switch		153,603		16	*
Car Battery Charger		863,837		159	*
Dual Polarity Power Supply		357,408		84	*
Fixed Voltage Power Supply		296,801		52	*
High Current Power Supply		321,423		66	*
High Voltage High Current Power Supply		240,010		35	*
LASER Power Supply		280,265		28
Portable CD Player Adapter For Car		198,842		12	*
Power Supply		719,928		259	*
Solid State Tesla Coil NEW!		133,248		4
Solid State Tesla Coil/High Voltage Generator		422,809		50
Transformerless Power Supply		447,828		117	*
Voltage Inverter		320,745		51	*
Voltage Inverter II		189,117		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		570,047		182
3 Watt FM Transmitter	Rae XL Tkacik	318,308		83	*
50 Watt Amplifier		491,315		74
8 Note Tune Player		130,396		12	*
8 Watt Audio Amp		355,748		67	*
Aircraft Radio Communications Receiver		261,498		49	*
Crystal Radio		149,887		53	*
Digital Volume Control		318,390		47	*
Electronic Stethoscope		297,926		141	*
FET Audio Mixer		327,802		41
FM Transmitter		975,389		420
Guitar Fuzz Effect		230,964		52	*
Microphone Mixer	Anatoly I. Shikhatov	237,039		26	*
Mono To Stereo Synthesizer	oRbEq	119,993		18	*
One Tube Regenerative Radio NEW!		122,537		4	*
Op Amp Radio		369,375		80	*
Single Chip AM Radio NEW!		90,393		2	*
Single Chip FM Radio NEW!		157,537		1	*
Sound Level Meter		327,490		51	*
Stereo Tube Amplifier	Weslee Kinsler	254,547		15	*
Tone Control		293,488		31
Transistor Organ		184,593		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		152,976		27	*
FM Telephone Bug		225,139		57
Phone Busy Indicator		203,168		24	*
Remote Telephone Ringer		108,204		3	*
Ringing Phone Light Flasher		201,970		35	*
Simple Phone Tap	Derek Tombrello	372,171		98	*
Telephone Hold Button		117,933		10
Telephone Recorder		204,874		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.