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, July 23, 2021	Simple Lie Detector	309
	Parallel (Printer) Port Interface	23
Yesterday Thursday, July 22, 2021	12VDC To 120VAC Inverter	59
	6V to 12V Converter	28
Of All Time	12VDC To 120VAC Inverter	1,489,429
	FM Transmitter	980,870

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		217,696		61	*
Car Alarm Arming Horn Beep Canceller	bob	128,460		6	*
Wireless Auto Tachometer		331,775		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	152,189		29	*
Parallel (Printer) Port Interface		273,019		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		434,460		63	*
3 Channel Spectrum Analyzer		210,572		20
40W Fluorescent Lamp Inverter	Bart Milnes	320,152		60	*
Adjustable Strobe Light		296,891		36
Black Light		263,368		29
Colour (Sound) Organ		278,905		36
Electronic Dice NEW!		179,421		10	*
Fantastic Atom Expander		193,089		25
Flash Slave Trigger		210,158		18	*
Infa-Red Remote Control		621,611		216	*
IR Remote Extender NEW!		122,118		2	*
IR Remote Jammer	Carl	252,165		110	*
IR Remote Switch NEW!		149,367		9	*
LASER Transmitter/Receiver		399,735		92
LED Chaser		433,336		83	*
LED Metronome NEW!		92,506		3	*
LED Thermometer		198,373		22	*
Light/Dark Detector		297,184		90	*
Simple Colour Organ		130,025		10	*
Strobe Light		265,116		27	*
TRIAC Light Dimmer		539,138		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		348,757		122	*
Electromagnetic Levitator NEW!		135,375		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		907,334		214	*
AC Motor Speed Controller		374,505		29	*
Air Flow Detector		242,770		54	*
Digital Keypad Combination Lock		188,023		20
Low Voltage Alarm		218,230		58	*
Pine Racecar Victory Judge		95,700		1	*
Pulse Width Modulation DC Motor Control		636,858		94
Rain Detector		295,350		112	*
Simple Lie Detector		549,544		323
Simple Polarity Tester	Dudley LeRoux	156,281		13	*
Simple Servo Controller		211,350		22	*
Simple Touch Switch NEW!		160,564		5	*
Simple Two Speed Contactor DC Motor Controller		195,849		21	*
Stepper Motor Controller		728,744		120	*
Time Delay Relay		544,927		88
Time Delay Relay II	jawaharlal@excite.com	234,935		39	*
Touch Switch		279,988		51	*
Video Activated Relay		113,812		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	170,582		10	*
Water Detector With Sump/Bilge Pump Controller		143,801		18	*
Wire Loop Alarm	Alex Meaden	197,245		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		301,691		25	*
12VDC To 120VAC Inverter		1,489,429		689
6V to 12V Converter		511,396		121
Automatic 12V Lead Acid Battery Charger		918,638		248
Automatic Load Sensing Power Switch		157,184		16	*
Car Battery Charger		867,989		159	*
Dual Polarity Power Supply		359,920		84	*
Fixed Voltage Power Supply		300,078		52	*
High Current Power Supply		325,023		66	*
High Voltage High Current Power Supply		243,010		35	*
LASER Power Supply		284,090		28
Portable CD Player Adapter For Car		202,164		12	*
Power Supply		724,366		259	*
Solid State Tesla Coil NEW!		135,623		4
Solid State Tesla Coil/High Voltage Generator		428,125		50
Transformerless Power Supply		451,478		117	*
Voltage Inverter		324,337		51	*
Voltage Inverter II		191,987		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		573,629		182
3 Watt FM Transmitter	Rae XL Tkacik	321,904		83	*
50 Watt Amplifier		495,019		74
8 Note Tune Player		132,984		12	*
8 Watt Audio Amp		359,587		67	*
Aircraft Radio Communications Receiver		265,058		49	*
Crystal Radio		151,354		53	*
Digital Volume Control		321,876		47	*
Electronic Stethoscope		302,148		142	*
FET Audio Mixer		331,668		41
FM Transmitter		980,870		420
Guitar Fuzz Effect		234,593		54	*
Microphone Mixer	Anatoly I. Shikhatov	240,304		26	*
Mono To Stereo Synthesizer	oRbEq	123,338		18	*
One Tube Regenerative Radio NEW!		125,238		4	*
Op Amp Radio		373,434		80	*
Single Chip AM Radio NEW!		92,050		2	*
Single Chip FM Radio NEW!		161,052		1	*
Sound Level Meter		330,689		51	*
Stereo Tube Amplifier	Weslee Kinsler	257,806		15	*
Tone Control		297,434		31
Transistor Organ		188,484		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		155,593		27	*
FM Telephone Bug		227,734		57
Phone Busy Indicator		205,656		24	*
Remote Telephone Ringer		110,910		3	*
Ringing Phone Light Flasher		205,338		35	*
Simple Phone Tap	Derek Tombrello	374,994		98	*
Telephone Hold Button		120,777		10
Telephone Recorder		207,934		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.