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 Wednesday, May 22, 2013	Automatic 12V Lead Acid Battery Charger	237
	12VDC To 120VAC Inverter	222
Yesterday Tuesday, May 21, 2013	12VDC To 120VAC Inverter	300
	Automatic 12V Lead Acid Battery Charger	295
Of All Time	12VDC To 120VAC Inverter	1,109,126
	FM Transmitter	764,577

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		150,704		59	*
Car Alarm Arming Horn Beep Canceller	bob	75,339		6	*
Wireless Auto Tachometer		233,668		57

Computer

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computer Controlled Frequency Counter/Logic Probe	Richard van Wyk	98,584		29	*
Parallel (Printer) Port Interface		195,459		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		320,188		61	*
3 Channel Spectrum Analyzer		128,521		18
40W Fluorescent Lamp Inverter	Bart Milnes	233,336		60	*
Adjustable Strobe Light		203,021		36
Black Light		175,789		29
Colour (Sound) Organ		197,782		34
Electronic Dice NEW!		90,645		8	*
Fantastic Atom Expander		117,844		24
Flash Slave Trigger		144,486		17	*
Infa-Red Remote Control		462,457		216	*
IR Remote Extender NEW!		52,346		2	*
IR Remote Jammer	Carl	174,256		109	*
IR Remote Switch NEW!		77,226		9	*
LASER Transmitter/Receiver		285,114		88
LED Chaser		315,570		82	*
LED Metronome NEW!		51,142		3	*
LED Thermometer		137,139		21	*
Light/Dark Detector		213,724		89	*
Simple Colour Organ		82,855		10	*
Strobe Light		196,020		27	*
TRIAC Light Dimmer		342,702		54

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		261,258		122	*
Electromagnetic Levitator NEW!		70,991		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		662,476		212	*
AC Motor Speed Controller		230,315		28	*
Air Flow Detector		157,860		53	*
Digital Keypad Combination Lock		116,726		19
Low Voltage Alarm		141,805		57	*
Pine Racecar Victory Judge		51,961		1	*
Pulse Width Modulation DC Motor Control		494,946		91
Rain Detector		212,187		110	*
Simple Lie Detector		414,759		318
Simple Polarity Tester	Dudley LeRoux	87,787		13	*
Simple Servo Controller		126,288		22	*
Simple Touch Switch NEW!		84,588		5	*
Simple Two Speed Contactor DC Motor Controller		134,985		21	*
Stepper Motor Controller		551,164		120	*
Time Delay Relay		392,006		83
Time Delay Relay II	jawaharlal@excite.com	158,805		38	*
Touch Switch		207,487		51	*
Video Activated Relay		62,025		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	106,989		9	*
Water Detector With Sump/Bilge Pump Controller		87,619		18	*
Wire Loop Alarm	Alex Meaden	138,309		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		157,145		22	*
12VDC To 120VAC Inverter		1,109,126		682
6V to 12V Converter		338,774		119
Automatic 12V Lead Acid Battery Charger		605,352		230
Automatic Load Sensing Power Switch		94,371		14	*
Car Battery Charger		691,987		158	*
Dual Polarity Power Supply		233,104		83	*
Fixed Voltage Power Supply		215,007		51	*
High Current Power Supply		222,111		62	*
High Voltage High Current Power Supply		174,709		33	*
LASER Power Supply		191,401		28
Portable CD Player Adapter For Car		136,888		12	*
Power Supply		559,612		256	*
Solid State Tesla Coil NEW!		70,379		2
Solid State Tesla Coil/High Voltage Generator		283,010		49
Transformerless Power Supply		330,394		116	*
Voltage Inverter		239,409		51	*
Voltage Inverter II		133,377		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		411,733		182
3 Watt FM Transmitter	Rae XL Tkacik	226,731		77	*
50 Watt Amplifier		364,527		73
8 Note Tune Player		84,502		12	*
8 Watt Audio Amp		246,487		63	*
Aircraft Radio Communications Receiver		164,082		46	*
Crystal Radio		101,066		53	*
Digital Volume Control		241,734		46	*
Electronic Stethoscope		185,497		138	*
FET Audio Mixer		208,005		39
FM Transmitter		764,577		412
Guitar Fuzz Effect		149,128		51	*
Microphone Mixer	Anatoly I. Shikhatov	160,235		25	*
Mono To Stereo Synthesizer	oRbEq	63,047		16	*
One Tube Regenerative Radio NEW!		53,505		4	*
Op Amp Radio		254,994		79	*
Single Chip AM Radio NEW!		39,500		2	*
Single Chip FM Radio NEW!		68,267		0	*
Sound Level Meter		239,585		50	*
Stereo Tube Amplifier	Weslee Kinsler	158,680		15	*
Tone Control		206,197		29
Transistor Organ		119,460		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		104,487		27	*
FM Telephone Bug		161,070		57
Phone Busy Indicator		114,549		22	*
Remote Telephone Ringer		69,394		3	*
Ringing Phone Light Flasher		134,578		32	*
Simple Phone Tap	Derek Tombrello	273,791		98	*
Telephone Hold Button		65,371		9
Telephone Recorder		146,259		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.