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 Monday, March 01, 2021	7 Segment LED Counter	87
	50 Watt Amplifier	43
Yesterday Sunday, February 28, 2021	12VDC To 120VAC Inverter	60
	12VDC Fluorescent Lamp Driver	59
Of All Time	12VDC To 120VAC Inverter	1,481,282
	FM Transmitter	976,575

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		214,686		61	*
Car Alarm Arming Horn Beep Canceller	bob	125,640		6	*
Wireless Auto Tachometer		328,452		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	150,019		29	*
Parallel (Printer) Port Interface		269,198		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		429,902		63	*
3 Channel Spectrum Analyzer		207,898		20
40W Fluorescent Lamp Inverter	Bart Milnes	316,997		60	*
Adjustable Strobe Light		293,351		36
Black Light		258,964		29
Colour (Sound) Organ		275,588		36
Electronic Dice NEW!		176,281		10	*
Fantastic Atom Expander		189,779		25
Flash Slave Trigger		207,082		18	*
Infa-Red Remote Control		618,072		216	*
IR Remote Extender NEW!		118,906		2	*
IR Remote Jammer	Carl	249,464		110	*
IR Remote Switch NEW!		146,513		9	*
LASER Transmitter/Receiver		395,422		92
LED Chaser		430,715		83	*
LED Metronome NEW!		91,372		3	*
LED Thermometer		196,160		22	*
Light/Dark Detector		294,827		90	*
Simple Colour Organ		128,030		10	*
Strobe Light		262,764		27	*
TRIAC Light Dimmer		536,652		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		345,542		122	*
Electromagnetic Levitator NEW!		133,159		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		902,812		214	*
AC Motor Speed Controller		371,175		29	*
Air Flow Detector		240,441		54	*
Digital Keypad Combination Lock		185,715		20
Low Voltage Alarm		215,574		58	*
Pine Racecar Victory Judge		93,796		1	*
Pulse Width Modulation DC Motor Control		634,127		94
Rain Detector		293,158		112	*
Simple Lie Detector		546,599		323
Simple Polarity Tester	Dudley LeRoux	153,307		13	*
Simple Servo Controller		208,856		22	*
Simple Touch Switch NEW!		158,369		5	*
Simple Two Speed Contactor DC Motor Controller		193,624		21	*
Stepper Motor Controller		725,101		120	*
Time Delay Relay		542,316		88
Time Delay Relay II	jawaharlal@excite.com	231,675		39	*
Touch Switch		277,629		51	*
Video Activated Relay		111,736		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	168,123		10	*
Water Detector With Sump/Bilge Pump Controller		141,078		18	*
Wire Loop Alarm	Alex Meaden	195,088		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		298,889		25	*
12VDC To 120VAC Inverter		1,481,282		689
6V to 12V Converter		507,820		121
Automatic 12V Lead Acid Battery Charger		914,728		248
Automatic Load Sensing Power Switch		154,417		16	*
Car Battery Charger		864,857		159	*
Dual Polarity Power Supply		357,937		84	*
Fixed Voltage Power Supply		297,536		52	*
High Current Power Supply		322,176		66	*
High Voltage High Current Power Supply		240,666		35	*
LASER Power Supply		281,036		28
Portable CD Player Adapter For Car		199,516		12	*
Power Supply		720,805		259	*
Solid State Tesla Coil NEW!		133,854		4
Solid State Tesla Coil/High Voltage Generator		424,013		50
Transformerless Power Supply		448,662		117	*
Voltage Inverter		321,545		51	*
Voltage Inverter II		189,693		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		570,848		182
3 Watt FM Transmitter	Rae XL Tkacik	319,044		83	*
50 Watt Amplifier		492,226		74
8 Note Tune Player		130,942		12	*
8 Watt Audio Amp		356,644		67	*
Aircraft Radio Communications Receiver		262,263		49	*
Crystal Radio		150,235		53	*
Digital Volume Control		319,177		47	*
Electronic Stethoscope		298,951		142	*
FET Audio Mixer		328,677		41
FM Transmitter		976,575		420
Guitar Fuzz Effect		231,739		52	*
Microphone Mixer	Anatoly I. Shikhatov	237,776		26	*
Mono To Stereo Synthesizer	oRbEq	120,706		18	*
One Tube Regenerative Radio NEW!		123,189		4	*
Op Amp Radio		370,288		80	*
Single Chip AM Radio NEW!		90,745		2	*
Single Chip FM Radio NEW!		158,317		1	*
Sound Level Meter		328,155		51	*
Stereo Tube Amplifier	Weslee Kinsler	255,285		15	*
Tone Control		294,418		31
Transistor Organ		185,857		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		153,512		27	*
FM Telephone Bug		225,738		57
Phone Busy Indicator		203,666		24	*
Remote Telephone Ringer		108,817		3	*
Ringing Phone Light Flasher		202,717		35	*
Simple Phone Tap	Derek Tombrello	372,781		98	*
Telephone Hold Button		118,499		10
Telephone Recorder		205,607		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.