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 Thursday, July 18, 2019	7 Segment LED Counter	9
	Colour (Sound) Organ	8
Yesterday Wednesday, July 17, 2019	Ringing Phone Light Flasher	67
	12VDC To 120VAC Inverter	64
Of All Time	12VDC To 120VAC Inverter	1,444,063
	FM Transmitter	954,106

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		199,765		61	*
Car Alarm Arming Horn Beep Canceller	bob	110,944		6	*
Wireless Auto Tachometer		309,770		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	139,182		29	*
Parallel (Printer) Port Interface		249,541		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		406,274		63	*
3 Channel Spectrum Analyzer		194,794		20
40W Fluorescent Lamp Inverter	Bart Milnes	300,065		60	*
Adjustable Strobe Light		275,458		36
Black Light		237,945		29
Colour (Sound) Organ		258,141		36
Electronic Dice NEW!		160,554		10	*
Fantastic Atom Expander		172,546		25
Flash Slave Trigger		191,387		18	*
Infa-Red Remote Control		596,835		216	*
IR Remote Extender NEW!		101,438		2	*
IR Remote Jammer	Carl	234,296		110	*
IR Remote Switch NEW!		131,040		9	*
LASER Transmitter/Receiver		375,791		92
LED Chaser		416,836		83	*
LED Metronome NEW!		85,185		3	*
LED Thermometer		184,011		22	*
Light/Dark Detector		282,087		90	*
Simple Colour Organ		117,930		10	*
Strobe Light		250,935		27	*
TRIAC Light Dimmer		466,560		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		323,627		122	*
Electromagnetic Levitator NEW!		121,484		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		877,746		214	*
AC Motor Speed Controller		353,755		29	*
Air Flow Detector		228,387		54	*
Digital Keypad Combination Lock		172,956		20
Low Voltage Alarm		202,373		58	*
Pine Racecar Victory Judge		83,026		1	*
Pulse Width Modulation DC Motor Control		619,815		93
Rain Detector		281,836		112	*
Simple Lie Detector		531,107		323
Simple Polarity Tester	Dudley LeRoux	137,703		13	*
Simple Servo Controller		195,932		22	*
Simple Touch Switch NEW!		147,319		5	*
Simple Two Speed Contactor DC Motor Controller		181,946		21	*
Stepper Motor Controller		705,821		120	*
Time Delay Relay		524,862		88
Time Delay Relay II	jawaharlal@excite.com	215,836		39	*
Touch Switch		264,835		51	*
Video Activated Relay		101,513		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	155,362		10	*
Water Detector With Sump/Bilge Pump Controller		127,091		18	*
Wire Loop Alarm	Alex Meaden	184,124		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		282,458		25	*
12VDC To 120VAC Inverter		1,444,063		688
6V to 12V Converter		467,909		121
Automatic 12V Lead Acid Battery Charger		890,636		246
Automatic Load Sensing Power Switch		141,048		16	*
Car Battery Charger		843,105		159	*
Dual Polarity Power Supply		347,779		84	*
Fixed Voltage Power Supply		285,160		52	*
High Current Power Supply		305,609		65	*
High Voltage High Current Power Supply		228,527		35	*
LASER Power Supply		265,867		28
Portable CD Player Adapter For Car		186,870		12	*
Power Supply		702,125		259	*
Solid State Tesla Coil NEW!		124,651		4
Solid State Tesla Coil/High Voltage Generator		403,660		50
Transformerless Power Supply		433,060		117	*
Voltage Inverter		310,540		51	*
Voltage Inverter II		178,733		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		555,616		182
3 Watt FM Transmitter	Rae XL Tkacik	304,412		82	*
50 Watt Amplifier		476,055		74
8 Note Tune Player		120,669		12	*
8 Watt Audio Amp		340,278		67	*
Aircraft Radio Communications Receiver		243,948		49	*
Crystal Radio		142,532		53	*
Digital Volume Control		305,265		47	*
Electronic Stethoscope		282,876		141	*
FET Audio Mixer		314,222		41
FM Transmitter		954,106		419
Guitar Fuzz Effect		217,156		52	*
Microphone Mixer	Anatoly I. Shikhatov	223,735		26	*
Mono To Stereo Synthesizer	oRbEq	107,320		18	*
One Tube Regenerative Radio NEW!		112,457		4	*
Op Amp Radio		353,998		80	*
Single Chip AM Radio NEW!		84,309		2	*
Single Chip FM Radio NEW!		143,762		1	*
Sound Level Meter		314,638		51	*
Stereo Tube Amplifier	Weslee Kinsler	241,811		15	*
Tone Control		278,747		31
Transistor Organ		171,535		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		142,778		27	*
FM Telephone Bug		213,532		57
Phone Busy Indicator		192,310		24	*
Remote Telephone Ringer		98,359		3	*
Ringing Phone Light Flasher		189,172		34	*
Simple Phone Tap	Derek Tombrello	338,810		98	*
Telephone Hold Button		106,677		10
Telephone Recorder		190,301		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.