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 Tuesday, May 21, 2013	Electronic Stethoscope	187
	Automatic 12V Lead Acid Battery Charger	160
Yesterday Monday, May 20, 2013	12VDC To 120VAC Inverter	279
	Automatic 12V Lead Acid Battery Charger	278
Of All Time	12VDC To 120VAC Inverter	1,108,759
	FM Transmitter	764,371

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		150,666		59	*
Car Alarm Arming Horn Beep Canceller	bob	75,314		6	*
Wireless Auto Tachometer		233,609		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	98,563		29	*
Parallel (Printer) Port Interface		195,421		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		320,128		61	*
3 Channel Spectrum Analyzer		128,463		18
40W Fluorescent Lamp Inverter	Bart Milnes	233,275		60	*
Adjustable Strobe Light		202,926		36
Black Light		175,747		29
Colour (Sound) Organ		197,737		34
Electronic Dice NEW!		90,599		8	*
Fantastic Atom Expander		117,810		24
Flash Slave Trigger		144,457		17	*
Infa-Red Remote Control		462,329		216	*
IR Remote Extender NEW!		52,300		2	*
IR Remote Jammer	Carl	174,222		109	*
IR Remote Switch NEW!		77,160		9	*
LASER Transmitter/Receiver		285,003		88
LED Chaser		315,499		82	*
LED Metronome NEW!		51,100		3	*
LED Thermometer		137,107		21	*
Light/Dark Detector		213,679		89	*
Simple Colour Organ		82,837		10	*
Strobe Light		195,983		27	*
TRIAC Light Dimmer		342,622		54

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		261,208		122	*
Electromagnetic Levitator NEW!		70,939		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		662,251		212	*
AC Motor Speed Controller		230,202		28	*
Air Flow Detector		157,817		53	*
Digital Keypad Combination Lock		116,692		19
Low Voltage Alarm		141,761		57	*
Pine Racecar Victory Judge		51,947		1	*
Pulse Width Modulation DC Motor Control		494,828		91
Rain Detector		212,133		110	*
Simple Lie Detector		414,682		318
Simple Polarity Tester	Dudley LeRoux	87,764		13	*
Simple Servo Controller		126,219		22	*
Simple Touch Switch NEW!		84,508		5	*
Simple Two Speed Contactor DC Motor Controller		134,960		21	*
Stepper Motor Controller		551,031		120	*
Time Delay Relay		391,884		83
Time Delay Relay II	jawaharlal@excite.com	158,778		38	*
Touch Switch		207,448		51	*
Video Activated Relay		62,006		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	106,966		9	*
Water Detector With Sump/Bilge Pump Controller		87,591		18	*
Wire Loop Alarm	Alex Meaden	138,272		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		157,008		22	*
12VDC To 120VAC Inverter		1,108,759		682
6V to 12V Converter		338,686		119
Automatic 12V Lead Acid Battery Charger		604,980		230
Automatic Load Sensing Power Switch		94,346		14	*
Car Battery Charger		691,875		158	*
Dual Polarity Power Supply		233,029		83	*
Fixed Voltage Power Supply		214,905		51	*
High Current Power Supply		222,041		62	*
High Voltage High Current Power Supply		174,668		33	*
LASER Power Supply		191,350		28
Portable CD Player Adapter For Car		136,861		12	*
Power Supply		559,494		256	*
Solid State Tesla Coil NEW!		70,329		2
Solid State Tesla Coil/High Voltage Generator		282,915		49
Transformerless Power Supply		330,296		116	*
Voltage Inverter		239,337		51	*
Voltage Inverter II		133,340		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		411,630		182
3 Watt FM Transmitter	Rae XL Tkacik	226,655		77	*
50 Watt Amplifier		364,425		73
8 Note Tune Player		84,471		12	*
8 Watt Audio Amp		246,406		63	*
Aircraft Radio Communications Receiver		164,025		46	*
Crystal Radio		101,031		53	*
Digital Volume Control		241,683		46	*
Electronic Stethoscope		185,444		138	*
FET Audio Mixer		207,932		39
FM Transmitter		764,371		412
Guitar Fuzz Effect		149,064		51	*
Microphone Mixer	Anatoly I. Shikhatov	160,158		25	*
Mono To Stereo Synthesizer	oRbEq	63,021		16	*
One Tube Regenerative Radio NEW!		53,457		4	*
Op Amp Radio		254,917		79	*
Single Chip AM Radio NEW!		39,476		2	*
Single Chip FM Radio NEW!		68,214		0	*
Sound Level Meter		239,500		50	*
Stereo Tube Amplifier	Weslee Kinsler	158,635		15	*
Tone Control		206,137		29
Transistor Organ		119,434		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		104,460		27	*
FM Telephone Bug		161,038		57
Phone Busy Indicator		114,509		22	*
Remote Telephone Ringer		69,376		3	*
Ringing Phone Light Flasher		134,540		32	*
Simple Phone Tap	Derek Tombrello	273,726		98	*
Telephone Hold Button		65,339		9
Telephone Recorder		146,238		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.