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 Sunday, September 22, 2019	12VDC To 120VAC Inverter	50
	Automatic 12V Lead Acid Battery Charger	36
Yesterday Saturday, September 21, 2019	Car Battery Charger	43
	Solid State Tesla Coil/High Voltage Generator	40
Of All Time	12VDC To 120VAC Inverter	1,448,107
	FM Transmitter	956,786

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		200,712		61	*
Car Alarm Arming Horn Beep Canceller	bob	111,871		6	*
Wireless Auto Tachometer		311,684		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	140,070		29	*
Parallel (Printer) Port Interface		251,821		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		407,913		63	*
3 Channel Spectrum Analyzer		195,927		20
40W Fluorescent Lamp Inverter	Bart Milnes	301,347		60	*
Adjustable Strobe Light		276,796		36
Black Light		239,730		29
Colour (Sound) Organ		259,385		36
Electronic Dice NEW!		161,748		10	*
Fantastic Atom Expander		173,869		25
Flash Slave Trigger		192,481		18	*
Infa-Red Remote Control		598,486		216	*
IR Remote Extender NEW!		102,646		2	*
IR Remote Jammer	Carl	235,483		110	*
IR Remote Switch NEW!		132,269		9	*
LASER Transmitter/Receiver		377,352		92
LED Chaser		418,436		83	*
LED Metronome NEW!		85,946		3	*
LED Thermometer		185,161		22	*
Light/Dark Detector		283,151		90	*
Simple Colour Organ		118,673		10	*
Strobe Light		251,953		27	*
TRIAC Light Dimmer		468,905		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		325,618		122	*
Electromagnetic Levitator NEW!		122,399		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		880,654		214	*
AC Motor Speed Controller		355,861		29	*
Air Flow Detector		229,431		54	*
Digital Keypad Combination Lock		174,610		20
Low Voltage Alarm		203,566		58	*
Pine Racecar Victory Judge		84,294		1	*
Pulse Width Modulation DC Motor Control		621,173		93
Rain Detector		282,822		112	*
Simple Lie Detector		533,052		323
Simple Polarity Tester	Dudley LeRoux	138,901		13	*
Simple Servo Controller		197,495		22	*
Simple Touch Switch NEW!		148,235		5	*
Simple Two Speed Contactor DC Motor Controller		182,894		21	*
Stepper Motor Controller		707,573		120	*
Time Delay Relay		526,824		88
Time Delay Relay II	jawaharlal@excite.com	217,000		39	*
Touch Switch		265,899		51	*
Video Activated Relay		102,336		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	156,648		10	*
Water Detector With Sump/Bilge Pump Controller		128,030		18	*
Wire Loop Alarm	Alex Meaden	185,059		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		284,518		25	*
12VDC To 120VAC Inverter		1,448,107		688
6V to 12V Converter		471,146		121
Automatic 12V Lead Acid Battery Charger		893,450		246
Automatic Load Sensing Power Switch		142,238		16	*
Car Battery Charger		845,674		159	*
Dual Polarity Power Supply		348,857		84	*
Fixed Voltage Power Supply		286,219		52	*
High Current Power Supply		307,460		65	*
High Voltage High Current Power Supply		229,574		35	*
LASER Power Supply		267,732		28
Portable CD Player Adapter For Car		187,916		12	*
Power Supply		704,512		259	*
Solid State Tesla Coil NEW!		125,812		4
Solid State Tesla Coil/High Voltage Generator		405,983		50
Transformerless Power Supply		434,884		117	*
Voltage Inverter		311,636		51	*
Voltage Inverter II		179,590		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		557,013		182
3 Watt FM Transmitter	Rae XL Tkacik	305,821		82	*
50 Watt Amplifier		477,655		74
8 Note Tune Player		121,459		12	*
8 Watt Audio Amp		342,173		67	*
Aircraft Radio Communications Receiver		245,753		49	*
Crystal Radio		143,758		53	*
Digital Volume Control		306,808		47	*
Electronic Stethoscope		284,371		141	*
FET Audio Mixer		315,400		41
FM Transmitter		956,786		419
Guitar Fuzz Effect		218,864		52	*
Microphone Mixer	Anatoly I. Shikhatov	225,468		26	*
Mono To Stereo Synthesizer	oRbEq	108,744		18	*
One Tube Regenerative Radio NEW!		114,238		4	*
Op Amp Radio		355,573		80	*
Single Chip AM Radio NEW!		85,129		2	*
Single Chip FM Radio NEW!		145,593		1	*
Sound Level Meter		316,249		51	*
Stereo Tube Amplifier	Weslee Kinsler	243,466		15	*
Tone Control		280,578		31
Transistor Organ		173,066		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		143,636		27	*
FM Telephone Bug		214,948		57
Phone Busy Indicator		193,757		24	*
Remote Telephone Ringer		99,057		3	*
Ringing Phone Light Flasher		190,336		34	*
Simple Phone Tap	Derek Tombrello	342,243		98	*
Telephone Hold Button		108,086		10
Telephone Recorder		191,499		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.