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 Saturday, March 25, 2023	12VDC To 120VAC Inverter	38
	Wireless Auto Tachometer	36
Yesterday Friday, March 24, 2023	12VDC To 120VAC Inverter	33
	AC Motor Speed Controller	23
Of All Time	12VDC To 120VAC Inverter	1,512,592
	FM Transmitter	999,953

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		224,373		61	*
Car Alarm Arming Horn Beep Canceller	bob	134,219		6	*
Wireless Auto Tachometer		339,911		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	157,772		29	*
Parallel (Printer) Port Interface		281,926		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		444,012		63	*
3 Channel Spectrum Analyzer		218,238		20
40W Fluorescent Lamp Inverter	Bart Milnes	327,319		60	*
Adjustable Strobe Light		305,548		36
Black Light		275,375		29
Colour (Sound) Organ		287,143		36
Electronic Dice NEW!		186,090		10	*
Fantastic Atom Expander		200,574		25
Flash Slave Trigger		218,493		18	*
Infa-Red Remote Control		630,516		216	*
IR Remote Extender NEW!		129,411		2	*
IR Remote Jammer	Carl	262,169		110	*
IR Remote Switch NEW!		155,110		9	*
LASER Transmitter/Receiver		411,111		92
LED Chaser		442,385		83	*
LED Metronome NEW!		97,143		3	*
LED Thermometer		204,312		22	*
Light/Dark Detector		303,574		90	*
Simple Colour Organ		135,401		11	*
Strobe Light		272,686		27	*
TRIAC Light Dimmer		547,864		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		356,196		122	*
Electromagnetic Levitator NEW!		141,617		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		917,927		214	*
AC Motor Speed Controller		385,270		29	*
Air Flow Detector		249,184		54	*
Digital Keypad Combination Lock		194,237		20
Low Voltage Alarm		226,646		58	*
Pine Racecar Victory Judge		100,846		1	*
Pulse Width Modulation DC Motor Control		644,970		94
Rain Detector		301,979		112	*
Simple Lie Detector		560,398		323
Simple Polarity Tester	Dudley LeRoux	162,829		13	*
Simple Servo Controller		218,581		22	*
Simple Touch Switch NEW!		167,011		6	*
Simple Two Speed Contactor DC Motor Controller		202,197		21	*
Stepper Motor Controller		740,533		120	*
Time Delay Relay		552,239		88
Time Delay Relay II	jawaharlal@excite.com	243,343		39	*
Touch Switch		286,879		51	*
Video Activated Relay		119,533		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	177,590		10	*
Water Detector With Sump/Bilge Pump Controller		150,320		18	*
Wire Loop Alarm	Alex Meaden	203,368		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		310,172		25	*
12VDC To 120VAC Inverter		1,512,592		691
6V to 12V Converter		522,336		121
Automatic 12V Lead Acid Battery Charger		932,081		248
Automatic Load Sensing Power Switch		164,459		16	*
Car Battery Charger		878,981		159	*
Dual Polarity Power Supply		367,696		84	*
Fixed Voltage Power Supply		308,029		52	*
High Current Power Supply		333,944		66	*
High Voltage High Current Power Supply		249,882		35	*
LASER Power Supply		292,458		28
Portable CD Player Adapter For Car		209,527		12	*
Power Supply		733,438		259	*
Solid State Tesla Coil NEW!		142,595		4
Solid State Tesla Coil/High Voltage Generator		439,057		51
Transformerless Power Supply		459,621		117	*
Voltage Inverter		334,030		51	*
Voltage Inverter II		199,250		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		581,819		182
3 Watt FM Transmitter	Rae XL Tkacik	330,347		83	*
50 Watt Amplifier		503,695		74
8 Note Tune Player		138,505		12	*
8 Watt Audio Amp		368,324		67	*
Aircraft Radio Communications Receiver		273,899		49	*
Crystal Radio		156,298		53	*
Digital Volume Control		335,052		47	*
Electronic Stethoscope		311,537		142	*
FET Audio Mixer		339,971		41
FM Transmitter		999,953		420
Guitar Fuzz Effect		243,377		54	*
Microphone Mixer	Anatoly I. Shikhatov	247,427		26	*
Mono To Stereo Synthesizer	oRbEq	130,536		18	*
One Tube Regenerative Radio NEW!		135,046		4	*
Op Amp Radio		383,313		80	*
Single Chip AM Radio NEW!		97,149		3	*
Single Chip FM Radio NEW!		168,584		1	*
Sound Level Meter		338,549		51	*
Stereo Tube Amplifier	Weslee Kinsler	265,036		15	*
Tone Control		306,557		31
Transistor Organ		196,020		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		161,529		27	*
FM Telephone Bug		233,458		57
Phone Busy Indicator		211,941		24	*
Remote Telephone Ringer		116,328		3	*
Ringing Phone Light Flasher		213,814		35	*
Simple Phone Tap	Derek Tombrello	381,179		98	*
Telephone Hold Button		126,877		10
Telephone Recorder		214,266		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.