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, June 13, 2021	Time Delay Relay	8
	Tone Control	7
Yesterday Saturday, June 12, 2021	12VDC To 120VAC Inverter	38
	Voltage Inverter	34
Of All Time	12VDC To 120VAC Inverter	1,487,718
	FM Transmitter	979,811

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		217,136		61	*
Car Alarm Arming Horn Beep Canceller	bob	127,939		6	*
Wireless Auto Tachometer		331,104		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	151,685		29	*
Parallel (Printer) Port Interface		272,189		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		433,635		63	*
3 Channel Spectrum Analyzer		209,968		20
40W Fluorescent Lamp Inverter	Bart Milnes	319,533		60	*
Adjustable Strobe Light		296,271		36
Black Light		262,415		29
Colour (Sound) Organ		278,271		36
Electronic Dice NEW!		178,787		10	*
Fantastic Atom Expander		192,515		25
Flash Slave Trigger		209,536		18	*
Infa-Red Remote Control		620,900		216	*
IR Remote Extender NEW!		121,573		2	*
IR Remote Jammer	Carl	251,638		110	*
IR Remote Switch NEW!		148,853		9	*
LASER Transmitter/Receiver		398,812		92
LED Chaser		432,719		83	*
LED Metronome NEW!		92,180		3	*
LED Thermometer		197,920		22	*
Light/Dark Detector		296,689		90	*
Simple Colour Organ		129,575		10	*
Strobe Light		264,566		27	*
TRIAC Light Dimmer		538,647		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		348,153		122	*
Electromagnetic Levitator NEW!		134,879		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		906,441		214	*
AC Motor Speed Controller		373,703		29	*
Air Flow Detector		242,239		54	*
Digital Keypad Combination Lock		187,525		20
Low Voltage Alarm		217,735		58	*
Pine Racecar Victory Judge		95,324		1	*
Pulse Width Modulation DC Motor Control		636,248		94
Rain Detector		294,883		112	*
Simple Lie Detector		548,672		323
Simple Polarity Tester	Dudley LeRoux	155,711		13	*
Simple Servo Controller		210,834		22	*
Simple Touch Switch NEW!		160,065		5	*
Simple Two Speed Contactor DC Motor Controller		195,342		21	*
Stepper Motor Controller		727,956		120	*
Time Delay Relay		544,325		88
Time Delay Relay II	jawaharlal@excite.com	234,221		39	*
Touch Switch		279,458		51	*
Video Activated Relay		113,372		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	169,973		10	*
Water Detector With Sump/Bilge Pump Controller		143,118		18	*
Wire Loop Alarm	Alex Meaden	196,778		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		301,069		25	*
12VDC To 120VAC Inverter		1,487,718		689
6V to 12V Converter		510,551		121
Automatic 12V Lead Acid Battery Charger		917,746		248
Automatic Load Sensing Power Switch		156,642		16	*
Car Battery Charger		867,273		159	*
Dual Polarity Power Supply		359,368		84	*
Fixed Voltage Power Supply		299,479		52	*
High Current Power Supply		324,358		66	*
High Voltage High Current Power Supply		242,479		35	*
LASER Power Supply		283,387		28
Portable CD Player Adapter For Car		201,607		12	*
Power Supply		723,629		259	*
Solid State Tesla Coil NEW!		135,135		4
Solid State Tesla Coil/High Voltage Generator		427,220		50
Transformerless Power Supply		450,823		117	*
Voltage Inverter		323,729		51	*
Voltage Inverter II		191,446		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		573,002		182
3 Watt FM Transmitter	Rae XL Tkacik	321,226		83	*
50 Watt Amplifier		494,444		74
8 Note Tune Player		132,572		12	*
8 Watt Audio Amp		358,923		67	*
Aircraft Radio Communications Receiver		264,412		49	*
Crystal Radio		151,034		53	*
Digital Volume Control		321,224		47	*
Electronic Stethoscope		301,487		142	*
FET Audio Mixer		331,048		41
FM Transmitter		979,811		420
Guitar Fuzz Effect		234,008		54	*
Microphone Mixer	Anatoly I. Shikhatov	239,746		26	*
Mono To Stereo Synthesizer	oRbEq	122,723		18	*
One Tube Regenerative Radio NEW!		124,687		4	*
Op Amp Radio		372,713		80	*
Single Chip AM Radio NEW!		91,674		2	*
Single Chip FM Radio NEW!		160,470		1	*
Sound Level Meter		330,110		51	*
Stereo Tube Amplifier	Weslee Kinsler	257,257		15	*
Tone Control		296,794		31
Transistor Organ		187,930		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		155,138		27	*
FM Telephone Bug		227,281		57
Phone Busy Indicator		205,186		24	*
Remote Telephone Ringer		110,448		3	*
Ringing Phone Light Flasher		204,717		35	*
Simple Phone Tap	Derek Tombrello	374,483		98	*
Telephone Hold Button		120,275		10
Telephone Recorder		207,381		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.