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, April 19, 2021	Telephone Hold Button	11
	Time Delay Relay II	10
Yesterday Sunday, April 18, 2021	Colour (Sound) Organ	50
	Black Light	48
Of All Time	12VDC To 120VAC Inverter	1,484,054
	FM Transmitter	978,120

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		215,930		61	*
Car Alarm Arming Horn Beep Canceller	bob	126,841		6	*
Wireless Auto Tachometer		329,828		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	150,875		29	*
Parallel (Printer) Port Interface		270,663		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		431,870		63	*
3 Channel Spectrum Analyzer		208,864		20
40W Fluorescent Lamp Inverter	Bart Milnes	318,285		60	*
Adjustable Strobe Light		294,838		36
Black Light		260,665		29
Colour (Sound) Organ		277,047		36
Electronic Dice NEW!		177,568		10	*
Fantastic Atom Expander		191,186		25
Flash Slave Trigger		208,327		18	*
Infa-Red Remote Control		619,526		216	*
IR Remote Extender NEW!		120,237		2	*
IR Remote Jammer	Carl	250,367		110	*
IR Remote Switch NEW!		147,688		9	*
LASER Transmitter/Receiver		397,039		92
LED Chaser		431,722		83	*
LED Metronome NEW!		91,743		3	*
LED Thermometer		197,077		22	*
Light/Dark Detector		295,761		90	*
Simple Colour Organ		128,831		10	*
Strobe Light		263,657		27	*
TRIAC Light Dimmer		537,703		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		346,888		122	*
Electromagnetic Levitator NEW!		134,025		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		904,808		214	*
AC Motor Speed Controller		372,401		29	*
Air Flow Detector		241,338		54	*
Digital Keypad Combination Lock		186,631		20
Low Voltage Alarm		216,572		58	*
Pine Racecar Victory Judge		94,566		1	*
Pulse Width Modulation DC Motor Control		635,128		94
Rain Detector		294,009		112	*
Simple Lie Detector		547,659		323
Simple Polarity Tester	Dudley LeRoux	154,530		13	*
Simple Servo Controller		209,834		22	*
Simple Touch Switch NEW!		159,252		5	*
Simple Two Speed Contactor DC Motor Controller		194,486		21	*
Stepper Motor Controller		726,637		120	*
Time Delay Relay		543,325		88
Time Delay Relay II	jawaharlal@excite.com	232,995		39	*
Touch Switch		278,574		51	*
Video Activated Relay		112,551		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	169,020		10	*
Water Detector With Sump/Bilge Pump Controller		142,100		18	*
Wire Loop Alarm	Alex Meaden	195,919		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		299,978		25	*
12VDC To 120VAC Inverter		1,484,054		689
6V to 12V Converter		509,185		121
Automatic 12V Lead Acid Battery Charger		916,171		248
Automatic Load Sensing Power Switch		155,494		16	*
Car Battery Charger		866,095		159	*
Dual Polarity Power Supply		358,511		84	*
Fixed Voltage Power Supply		298,513		52	*
High Current Power Supply		323,240		66	*
High Voltage High Current Power Supply		241,577		35	*
LASER Power Supply		282,154		28
Portable CD Player Adapter For Car		200,506		12	*
Power Supply		721,952		259	*
Solid State Tesla Coil NEW!		134,451		4
Solid State Tesla Coil/High Voltage Generator		425,653		50
Transformerless Power Supply		449,772		117	*
Voltage Inverter		322,521		51	*
Voltage Inverter II		190,557		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		571,972		182
3 Watt FM Transmitter	Rae XL Tkacik	320,124		83	*
50 Watt Amplifier		493,344		74
8 Note Tune Player		131,767		12	*
8 Watt Audio Amp		357,792		67	*
Aircraft Radio Communications Receiver		263,309		49	*
Crystal Radio		150,580		53	*
Digital Volume Control		320,217		47	*
Electronic Stethoscope		300,213		142	*
FET Audio Mixer		329,836		41
FM Transmitter		978,120		420
Guitar Fuzz Effect		232,856		54	*
Microphone Mixer	Anatoly I. Shikhatov	238,757		26	*
Mono To Stereo Synthesizer	oRbEq	121,712		18	*
One Tube Regenerative Radio NEW!		123,875		4	*
Op Amp Radio		371,567		80	*
Single Chip AM Radio NEW!		91,174		2	*
Single Chip FM Radio NEW!		159,337		1	*
Sound Level Meter		329,145		51	*
Stereo Tube Amplifier	Weslee Kinsler	256,261		15	*
Tone Control		295,568		31
Transistor Organ		186,907		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		154,328		27	*
FM Telephone Bug		226,520		57
Phone Busy Indicator		204,428		24	*
Remote Telephone Ringer		109,631		3	*
Ringing Phone Light Flasher		203,774		35	*
Simple Phone Tap	Derek Tombrello	373,630		98	*
Telephone Hold Button		119,381		10
Telephone Recorder		206,498		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.