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 30, 2023	Aircraft Radio Communications Receiver	19
	FM Transmitter	18
Yesterday Monday, May 29, 2023	12VDC To 120VAC Inverter	57
	FM Transmitter	30
Of All Time	12VDC To 120VAC Inverter	1,515,405
	FM Transmitter	1,001,512

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		224,857		61	*
Car Alarm Arming Horn Beep Canceller	bob	134,711		6	*
Wireless Auto Tachometer		340,582		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	158,198		29	*
Parallel (Printer) Port Interface		282,590		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		444,756		63	*
3 Channel Spectrum Analyzer		218,837		20
40W Fluorescent Lamp Inverter	Bart Milnes	327,869		60	*
Adjustable Strobe Light		306,236		36
Black Light		276,361		29
Colour (Sound) Organ		287,807		36
Electronic Dice NEW!		186,776		10	*
Fantastic Atom Expander		201,069		25
Flash Slave Trigger		219,079		18	*
Infa-Red Remote Control		631,200		216	*
IR Remote Extender NEW!		130,137		2	*
IR Remote Jammer	Carl	262,790		110	*
IR Remote Switch NEW!		155,646		9	*
LASER Transmitter/Receiver		411,970		92
LED Chaser		443,018		83	*
LED Metronome NEW!		97,504		3	*
LED Thermometer		204,751		22	*
Light/Dark Detector		304,052		90	*
Simple Colour Organ		135,845		11	*
Strobe Light		273,156		27	*
TRIAC Light Dimmer		548,669		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		356,823		122	*
Electromagnetic Levitator NEW!		142,249		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		918,766		214	*
AC Motor Speed Controller		386,321		29	*
Air Flow Detector		249,669		54	*
Digital Keypad Combination Lock		194,729		20
Low Voltage Alarm		227,119		58	*
Pine Racecar Victory Judge		101,230		1	*
Pulse Width Modulation DC Motor Control		645,575		94
Rain Detector		302,485		112	*
Simple Lie Detector		561,081		323
Simple Polarity Tester	Dudley LeRoux	163,342		13	*
Simple Servo Controller		219,170		22	*
Simple Touch Switch NEW!		167,547		6	*
Simple Two Speed Contactor DC Motor Controller		202,732		21	*
Stepper Motor Controller		741,447		120	*
Time Delay Relay		552,841		88
Time Delay Relay II	jawaharlal@excite.com	244,091		39	*
Touch Switch		287,413		51	*
Video Activated Relay		119,987		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	178,258		10	*
Water Detector With Sump/Bilge Pump Controller		150,833		18	*
Wire Loop Alarm	Alex Meaden	203,868		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		311,142		25	*
12VDC To 120VAC Inverter		1,515,405		691
6V to 12V Converter		523,176		121
Automatic 12V Lead Acid Battery Charger		933,035		248
Automatic Load Sensing Power Switch		165,045		16	*
Car Battery Charger		879,721		159	*
Dual Polarity Power Supply		368,351		84	*
Fixed Voltage Power Supply		308,646		52	*
High Current Power Supply		334,759		66	*
High Voltage High Current Power Supply		250,429		35	*
LASER Power Supply		293,177		28
Portable CD Player Adapter For Car		210,090		12	*
Power Supply		734,610		259	*
Solid State Tesla Coil NEW!		143,296		4
Solid State Tesla Coil/High Voltage Generator		439,854		51
Transformerless Power Supply		460,296		117	*
Voltage Inverter		334,865		51	*
Voltage Inverter II		199,870		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		582,457		182
3 Watt FM Transmitter	Rae XL Tkacik	331,350		83	*
50 Watt Amplifier		504,433		74
8 Note Tune Player		138,970		12	*
8 Watt Audio Amp		369,137		67	*
Aircraft Radio Communications Receiver		274,736		49	*
Crystal Radio		156,693		53	*
Digital Volume Control		335,692		47	*
Electronic Stethoscope		312,299		142	*
FET Audio Mixer		340,652		41
FM Transmitter		1,001,512		420
Guitar Fuzz Effect		244,091		54	*
Microphone Mixer	Anatoly I. Shikhatov	248,039		26	*
Mono To Stereo Synthesizer	oRbEq	131,150		18	*
One Tube Regenerative Radio NEW!		136,168		4	*
Op Amp Radio		384,310		80	*
Single Chip AM Radio NEW!		97,621		3	*
Single Chip FM Radio NEW!		169,360		1	*
Sound Level Meter		339,194		51	*
Stereo Tube Amplifier	Weslee Kinsler	265,681		15	*
Tone Control		307,255		31
Transistor Organ		196,659		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		161,953		27	*
FM Telephone Bug		233,862		57
Phone Busy Indicator		212,357		24	*
Remote Telephone Ringer		116,726		3	*
Ringing Phone Light Flasher		214,773		35	*
Simple Phone Tap	Derek Tombrello	381,612		98	*
Telephone Hold Button		127,329		10
Telephone Recorder		214,755		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.