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, May 27, 2019	FM Transmitter	10
	High Current Power Supply	9
Yesterday Sunday, May 26, 2019	6V to 12V Converter	136
	Sound Level Meter	94
Of All Time	12VDC To 120VAC Inverter	1,439,688
	FM Transmitter	951,494

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		198,563		61	*
Car Alarm Arming Horn Beep Canceller	bob	109,711		6	*
Wireless Auto Tachometer		307,971		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	138,216		29	*
Parallel (Printer) Port Interface		247,602		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		404,311		63	*
3 Channel Spectrum Analyzer		193,653		20
40W Fluorescent Lamp Inverter	Bart Milnes	298,650		60	*
Adjustable Strobe Light		273,947		36
Black Light		235,977		29
Colour (Sound) Organ		256,618		36
Electronic Dice NEW!		159,195		10	*
Fantastic Atom Expander		170,993		25
Flash Slave Trigger		190,069		18	*
Infa-Red Remote Control		595,113		216	*
IR Remote Extender NEW!		99,969		2	*
IR Remote Jammer	Carl	233,167		110	*
IR Remote Switch NEW!		129,704		9	*
LASER Transmitter/Receiver		374,025		92
LED Chaser		415,544		83	*
LED Metronome NEW!		84,536		3	*
LED Thermometer		182,964		22	*
Light/Dark Detector		281,048		90	*
Simple Colour Organ		117,138		10	*
Strobe Light		249,975		27	*
TRIAC Light Dimmer		464,833		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		321,924		122	*
Electromagnetic Levitator NEW!		120,291		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		875,062		214	*
AC Motor Speed Controller		352,090		29	*
Air Flow Detector		227,371		54	*
Digital Keypad Combination Lock		171,734		20
Low Voltage Alarm		201,296		58	*
Pine Racecar Victory Judge		82,029		1	*
Pulse Width Modulation DC Motor Control		618,471		93
Rain Detector		280,843		112	*
Simple Lie Detector		529,606		323
Simple Polarity Tester	Dudley LeRoux	136,315		13	*
Simple Servo Controller		194,619		22	*
Simple Touch Switch NEW!		146,363		5	*
Simple Two Speed Contactor DC Motor Controller		180,955		21	*
Stepper Motor Controller		703,764		120	*
Time Delay Relay		523,426		88
Time Delay Relay II	jawaharlal@excite.com	214,498		39	*
Touch Switch		263,797		51	*
Video Activated Relay		100,664		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	154,154		10	*
Water Detector With Sump/Bilge Pump Controller		126,176		18	*
Wire Loop Alarm	Alex Meaden	183,200		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		280,815		25	*
12VDC To 120VAC Inverter		1,439,688		688
6V to 12V Converter		464,228		121
Automatic 12V Lead Acid Battery Charger		888,382		246
Automatic Load Sensing Power Switch		139,932		16	*
Car Battery Charger		841,132		159	*
Dual Polarity Power Supply		346,662		84	*
Fixed Voltage Power Supply		284,089		52	*
High Current Power Supply		304,124		65	*
High Voltage High Current Power Supply		227,526		35	*
LASER Power Supply		264,222		28
Portable CD Player Adapter For Car		185,826		12	*
Power Supply		700,275		259	*
Solid State Tesla Coil NEW!		123,751		4
Solid State Tesla Coil/High Voltage Generator		401,737		50
Transformerless Power Supply		431,679		117	*
Voltage Inverter		309,188		51	*
Voltage Inverter II		177,847		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		554,255		182
3 Watt FM Transmitter	Rae XL Tkacik	303,159		82	*
50 Watt Amplifier		474,459		74
8 Note Tune Player		119,857		12	*
8 Watt Audio Amp		338,692		67	*
Aircraft Radio Communications Receiver		242,344		49	*
Crystal Radio		141,723		53	*
Digital Volume Control		303,982		47	*
Electronic Stethoscope		281,531		141	*
FET Audio Mixer		312,956		41
FM Transmitter		951,494		419
Guitar Fuzz Effect		215,769		52	*
Microphone Mixer	Anatoly I. Shikhatov	222,345		26	*
Mono To Stereo Synthesizer	oRbEq	106,107		18	*
One Tube Regenerative Radio NEW!		111,414		4	*
Op Amp Radio		352,515		80	*
Single Chip AM Radio NEW!		83,672		2	*
Single Chip FM Radio NEW!		142,304		1	*
Sound Level Meter		312,900		51	*
Stereo Tube Amplifier	Weslee Kinsler	240,418		15	*
Tone Control		277,264		31
Transistor Organ		170,275		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		141,894		27	*
FM Telephone Bug		212,280		57
Phone Busy Indicator		191,164		24	*
Remote Telephone Ringer		97,555		3	*
Ringing Phone Light Flasher		187,832		34	*
Simple Phone Tap	Derek Tombrello	337,661		98	*
Telephone Hold Button		105,476		10
Telephone Recorder		189,070		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.