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, April 22, 2018	Colour (Sound) Organ	4
	Light/Dark Detector	3
Yesterday Saturday, April 21, 2018	Dual Polarity Power Supply	80
	12VDC To 120VAC Inverter	73
Of All Time	12VDC To 120VAC Inverter	1,408,718
	FM Transmitter	932,681

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		188,822		61	*
Car Alarm Arming Horn Beep Canceller	bob	100,717		6	*
Wireless Auto Tachometer		296,505		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	132,262		29	*
Parallel (Printer) Port Interface		235,218		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		391,793		63	*
3 Channel Spectrum Analyzer		184,297		20
40W Fluorescent Lamp Inverter	Bart Milnes	289,303		60	*
Adjustable Strobe Light		262,121		36
Black Light		223,972		29
Colour (Sound) Organ		246,193		36
Electronic Dice NEW!		150,043		10	*
Fantastic Atom Expander		160,391		25
Flash Slave Trigger		180,888		18	*
Infa-Red Remote Control		579,544		216	*
IR Remote Extender NEW!		90,606		2	*
IR Remote Jammer	Carl	223,870		110	*
IR Remote Switch NEW!		121,031		9	*
LASER Transmitter/Receiver		361,924		92
LED Chaser		405,268		83	*
LED Metronome NEW!		80,083		3	*
LED Thermometer		175,131		22	*
Light/Dark Detector		274,088		90	*
Simple Colour Organ		110,224		10	*
Strobe Light		242,015		27	*
TRIAC Light Dimmer		454,466		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		311,017		122	*
Electromagnetic Levitator NEW!		111,526		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		855,635		214	*
AC Motor Speed Controller		336,993		29	*
Air Flow Detector		218,613		54	*
Digital Keypad Combination Lock		162,271		20
Low Voltage Alarm		191,753		58	*
Pine Racecar Victory Judge		74,713		1	*
Pulse Width Modulation DC Motor Control		608,627		93
Rain Detector		270,858		112	*
Simple Lie Detector		515,647		323
Simple Polarity Tester	Dudley LeRoux	127,202		13	*
Simple Servo Controller		183,623		22	*
Simple Touch Switch NEW!		137,846		5	*
Simple Two Speed Contactor DC Motor Controller		174,784		21	*
Stepper Motor Controller		677,271		120	*
Time Delay Relay		510,407		88
Time Delay Relay II	jawaharlal@excite.com	203,365		39	*
Touch Switch		255,106		51	*
Video Activated Relay		92,967		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	144,875		10	*
Water Detector With Sump/Bilge Pump Controller		118,762		18	*
Wire Loop Alarm	Alex Meaden	176,574		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		266,346		25	*
12VDC To 120VAC Inverter		1,408,718		688
6V to 12V Converter		447,882		121
Automatic 12V Lead Acid Battery Charger		870,435		246
Automatic Load Sensing Power Switch		132,212		16	*
Car Battery Charger		821,370		159	*
Dual Polarity Power Supply		315,452		84	*
Fixed Voltage Power Supply		276,369		52	*
High Current Power Supply		293,675		65	*
High Voltage High Current Power Supply		220,090		35	*
LASER Power Supply		251,111		28
Portable CD Player Adapter For Car		178,064		12	*
Power Supply		684,591		259	*
Solid State Tesla Coil NEW!		116,359		4
Solid State Tesla Coil/High Voltage Generator		385,145		50
Transformerless Power Supply		417,120		117	*
Voltage Inverter		302,450		51	*
Voltage Inverter II		171,830		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		543,463		182
3 Watt FM Transmitter	Rae XL Tkacik	294,163		82	*
50 Watt Amplifier		459,600		74
8 Note Tune Player		114,247		12	*
8 Watt Audio Amp		326,520		67	*
Aircraft Radio Communications Receiver		230,564		49	*
Crystal Radio		134,974		53	*
Digital Volume Control		294,741		47	*
Electronic Stethoscope		271,545		141	*
FET Audio Mixer		302,113		41
FM Transmitter		932,681		419
Guitar Fuzz Effect		203,706		52	*
Microphone Mixer	Anatoly I. Shikhatov	212,943		26	*
Mono To Stereo Synthesizer	oRbEq	97,059		18	*
One Tube Regenerative Radio NEW!		102,805		4	*
Op Amp Radio		342,166		80	*
Single Chip AM Radio NEW!		78,935		2	*
Single Chip FM Radio NEW!		131,402		1	*
Sound Level Meter		302,591		51	*
Stereo Tube Amplifier	Weslee Kinsler	230,897		15	*
Tone Control		266,583		31
Transistor Organ		161,400		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		135,933		27	*
FM Telephone Bug		200,986		57
Phone Busy Indicator		182,421		24	*
Remote Telephone Ringer		92,155		3	*
Ringing Phone Light Flasher		180,077		34	*
Simple Phone Tap	Derek Tombrello	328,226		98	*
Telephone Hold Button		96,397		10
Telephone Recorder		181,261		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.