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, April 26, 2024	Op Amp Radio	27
	12VDC To 120VAC Inverter	27
Yesterday Thursday, April 25, 2024	12VDC To 120VAC Inverter	34
	Stepper Motor Controller	33
Of All Time	12VDC To 120VAC Inverter	1,531,708
	FM Transmitter	1,009,416

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		227,648		61	*
Car Alarm Arming Horn Beep Canceller	bob	137,223		6	*
Wireless Auto Tachometer		343,771		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	160,520		29	*
Parallel (Printer) Port Interface		286,619		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		448,428		63	*
3 Channel Spectrum Analyzer		222,522		20
40W Fluorescent Lamp Inverter	Bart Milnes	330,897		60	*
Adjustable Strobe Light		309,790		36
Black Light		281,509		29
Colour (Sound) Organ		291,460		36
Electronic Dice NEW!		189,954		10	*
Fantastic Atom Expander		203,698		25
Flash Slave Trigger		221,961		18	*
Infa-Red Remote Control		638,007		216	*
IR Remote Extender NEW!		133,461		3	*
IR Remote Jammer	Carl	266,947		110	*
IR Remote Switch NEW!		158,395		9	*
LASER Transmitter/Receiver		417,318		92
LED Chaser		446,805		83	*
LED Metronome NEW!		100,176		3	*
LED Thermometer		207,497		22	*
Light/Dark Detector		306,895		90	*
Simple Colour Organ		138,229		11	*
Strobe Light		276,612		27	*
TRIAC Light Dimmer		553,659		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		360,162		122	*
Electromagnetic Levitator NEW!		145,155		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		923,137		214	*
AC Motor Speed Controller		392,289		29	*
Air Flow Detector		252,560		54	*
Digital Keypad Combination Lock		203,066		20
Low Voltage Alarm		230,030		58	*
Pine Racecar Victory Judge		103,435		1	*
Pulse Width Modulation DC Motor Control		655,783		94
Rain Detector		305,483		112	*
Simple Lie Detector		565,472		323
Simple Polarity Tester	Dudley LeRoux	166,211		13	*
Simple Servo Controller		222,264		22	*
Simple Touch Switch NEW!		170,687		6	*
Simple Two Speed Contactor DC Motor Controller		206,028		21	*
Stepper Motor Controller		746,960		120	*
Time Delay Relay		556,467		88
Time Delay Relay II	jawaharlal@excite.com	247,863		39	*
Touch Switch		290,554		51	*
Video Activated Relay		122,564		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	182,109		10	*
Water Detector With Sump/Bilge Pump Controller		153,600		18	*
Wire Loop Alarm	Alex Meaden	206,505		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		316,960		25	*
12VDC To 120VAC Inverter		1,531,708		691
6V to 12V Converter		528,469		121
Automatic 12V Lead Acid Battery Charger		938,172		248
Automatic Load Sensing Power Switch		168,208		16	*
Car Battery Charger		884,127		159	*
Dual Polarity Power Supply		372,100		84	*
Fixed Voltage Power Supply		312,091		52	*
High Current Power Supply		339,940		66	*
High Voltage High Current Power Supply		264,878		35	*
LASER Power Supply		297,071		28
Portable CD Player Adapter For Car		213,231		12	*
Power Supply		739,460		259	*
Solid State Tesla Coil NEW!		147,286		4
Solid State Tesla Coil/High Voltage Generator		445,373		51
Transformerless Power Supply		464,007		117	*
Voltage Inverter		340,009		51	*
Voltage Inverter II		204,017		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		586,330		182
3 Watt FM Transmitter	Rae XL Tkacik	336,278		83	*
50 Watt Amplifier		508,751		74
8 Note Tune Player		141,499		12	*
8 Watt Audio Amp		373,910		67	*
Aircraft Radio Communications Receiver		279,483		49	*
Crystal Radio		159,777		53	*
Digital Volume Control		339,413		47	*
Electronic Stethoscope		322,166		142	*
FET Audio Mixer		344,503		41
FM Transmitter		1,009,416		420
Guitar Fuzz Effect		248,551		54	*
Microphone Mixer	Anatoly I. Shikhatov	251,506		26	*
Mono To Stereo Synthesizer	oRbEq	134,701		18	*
One Tube Regenerative Radio NEW!		143,348		4	*
Op Amp Radio		389,900		80	*
Single Chip AM Radio NEW!		100,663		3	*
Single Chip FM Radio NEW!		173,577		1	*
Sound Level Meter		342,915		51	*
Stereo Tube Amplifier	Weslee Kinsler	269,243		15	*
Tone Control		310,679		31
Transistor Organ		200,614		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		164,435		27	*
FM Telephone Bug		236,240		57
Phone Busy Indicator		214,803		24	*
Remote Telephone Ringer		119,125		3	*
Ringing Phone Light Flasher		219,318		35	*
Simple Phone Tap	Derek Tombrello	384,482		98	*
Telephone Hold Button		129,939		10
Telephone Recorder		217,481		55	*

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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.