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, January 31, 2023	Time Delay Relay II	27
	12V To 24V DC-DC Converter	22
Yesterday Monday, January 30, 2023	FM Transmitter	32
	LASER Transmitter/Receiver	31
Of All Time	12VDC To 120VAC Inverter	1,510,682
	FM Transmitter	998,543

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		223,919		61	*
Car Alarm Arming Horn Beep Canceller	bob	133,793		6	*
Wireless Auto Tachometer		339,288		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	157,374		29	*
Parallel (Printer) Port Interface		281,257		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		443,291		63	*
3 Channel Spectrum Analyzer		217,651		20
40W Fluorescent Lamp Inverter	Bart Milnes	326,785		60	*
Adjustable Strobe Light		304,887		36
Black Light		274,485		29
Colour (Sound) Organ		286,514		36
Electronic Dice NEW!		185,554		10	*
Fantastic Atom Expander		200,112		25
Flash Slave Trigger		217,182		18	*
Infa-Red Remote Control		629,893		216	*
IR Remote Extender NEW!		128,804		2	*
IR Remote Jammer	Carl	261,381		110	*
IR Remote Switch NEW!		154,642		9	*
LASER Transmitter/Receiver		410,215		92
LED Chaser		441,011		83	*
LED Metronome NEW!		96,796		3	*
LED Thermometer		203,899		22	*
Light/Dark Detector		303,155		90	*
Simple Colour Organ		134,957		11	*
Strobe Light		272,247		27	*
TRIAC Light Dimmer		547,026		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		355,612		122	*
Electromagnetic Levitator NEW!		141,174		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		917,140		214	*
AC Motor Speed Controller		384,409		29	*
Air Flow Detector		248,681		54	*
Digital Keypad Combination Lock		193,807		20
Low Voltage Alarm		226,211		58	*
Pine Racecar Victory Judge		100,505		1	*
Pulse Width Modulation DC Motor Control		644,420		94
Rain Detector		301,539		112	*
Simple Lie Detector		556,764		323
Simple Polarity Tester	Dudley LeRoux	162,310		13	*
Simple Servo Controller		218,059		22	*
Simple Touch Switch NEW!		166,545		5	*
Simple Two Speed Contactor DC Motor Controller		201,753		21	*
Stepper Motor Controller		739,756		120	*
Time Delay Relay		551,680		88
Time Delay Relay II	jawaharlal@excite.com	242,626		39	*
Touch Switch		286,329		51	*
Video Activated Relay		119,107		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	176,985		10	*
Water Detector With Sump/Bilge Pump Controller		149,888		18	*
Wire Loop Alarm	Alex Meaden	202,942		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		309,524		25	*
12VDC To 120VAC Inverter		1,510,682		691
6V to 12V Converter		521,603		121
Automatic 12V Lead Acid Battery Charger		931,266		248
Automatic Load Sensing Power Switch		163,977		16	*
Car Battery Charger		877,822		159	*
Dual Polarity Power Supply		367,116		84	*
Fixed Voltage Power Supply		307,398		52	*
High Current Power Supply		333,215		66	*
High Voltage High Current Power Supply		249,351		35	*
LASER Power Supply		291,833		28
Portable CD Player Adapter For Car		209,045		12	*
Power Supply		732,672		259	*
Solid State Tesla Coil NEW!		142,102		4
Solid State Tesla Coil/High Voltage Generator		438,325		51
Transformerless Power Supply		459,054		117	*
Voltage Inverter		333,436		51	*
Voltage Inverter II		198,643		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		581,244		182
3 Watt FM Transmitter	Rae XL Tkacik	329,734		83	*
50 Watt Amplifier		502,974		74
8 Note Tune Player		138,088		12	*
8 Watt Audio Amp		367,701		67	*
Aircraft Radio Communications Receiver		273,280		49	*
Crystal Radio		155,569		53	*
Digital Volume Control		334,511		47	*
Electronic Stethoscope		310,857		142	*
FET Audio Mixer		339,386		41
FM Transmitter		998,543		420
Guitar Fuzz Effect		242,727		54	*
Microphone Mixer	Anatoly I. Shikhatov	246,862		26	*
Mono To Stereo Synthesizer	oRbEq	130,010		18	*
One Tube Regenerative Radio NEW!		134,168		4	*
Op Amp Radio		382,506		80	*
Single Chip AM Radio NEW!		96,748		2	*
Single Chip FM Radio NEW!		167,832		1	*
Sound Level Meter		337,859		51	*
Stereo Tube Amplifier	Weslee Kinsler	264,445		15	*
Tone Control		305,979		31
Transistor Organ		195,354		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		161,133		27	*
FM Telephone Bug		233,061		57
Phone Busy Indicator		211,485		24	*
Remote Telephone Ringer		115,968		3	*
Ringing Phone Light Flasher		213,237		35	*
Simple Phone Tap	Derek Tombrello	380,731		98	*
Telephone Hold Button		126,441		10
Telephone Recorder		213,832		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.