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, August 22, 2019	Parallel (Printer) Port Interface	243
	12VDC To 120VAC Inverter	24
Yesterday Wednesday, August 21, 2019	6V to 12V Converter	92
	12VDC To 120VAC Inverter	58
Of All Time	12VDC To 120VAC Inverter	1,446,135
	FM Transmitter	955,521

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		200,280		61	*
Car Alarm Arming Horn Beep Canceller	bob	111,454		6	*
Wireless Auto Tachometer		310,737		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	139,648		29	*
Parallel (Printer) Port Interface		250,857		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		407,178		63	*
3 Channel Spectrum Analyzer		195,393		20
40W Fluorescent Lamp Inverter	Bart Milnes	300,756		60	*
Adjustable Strobe Light		276,200		36
Black Light		238,891		29
Colour (Sound) Organ		258,821		36
Electronic Dice NEW!		161,216		10	*
Fantastic Atom Expander		173,235		25
Flash Slave Trigger		191,988		18	*
Infa-Red Remote Control		597,717		216	*
IR Remote Extender NEW!		102,081		2	*
IR Remote Jammer	Carl	234,995		110	*
IR Remote Switch NEW!		131,689		9	*
LASER Transmitter/Receiver		376,621		92
LED Chaser		417,535		83	*
LED Metronome NEW!		85,593		3	*
LED Thermometer		184,630		22	*
Light/Dark Detector		282,639		90	*
Simple Colour Organ		118,345		10	*
Strobe Light		251,482		27	*
TRIAC Light Dimmer		467,848		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		324,959		122	*
Electromagnetic Levitator NEW!		122,011		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		879,086		214	*
AC Motor Speed Controller		354,809		29	*
Air Flow Detector		228,960		54	*
Digital Keypad Combination Lock		173,752		20
Low Voltage Alarm		203,032		58	*
Pine Racecar Victory Judge		83,682		1	*
Pulse Width Modulation DC Motor Control		620,554		93
Rain Detector		282,352		112	*
Simple Lie Detector		532,076		323
Simple Polarity Tester	Dudley LeRoux	138,313		13	*
Simple Servo Controller		196,732		22	*
Simple Touch Switch NEW!		147,842		5	*
Simple Two Speed Contactor DC Motor Controller		182,449		21	*
Stepper Motor Controller		706,746		120	*
Time Delay Relay		525,814		88
Time Delay Relay II	jawaharlal@excite.com	216,458		39	*
Touch Switch		265,393		51	*
Video Activated Relay		101,969		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	156,007		10	*
Water Detector With Sump/Bilge Pump Controller		127,579		18	*
Wire Loop Alarm	Alex Meaden	184,615		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		283,485		25	*
12VDC To 120VAC Inverter		1,446,135		688
6V to 12V Converter		469,407		121
Automatic 12V Lead Acid Battery Charger		892,152		246
Automatic Load Sensing Power Switch		141,684		16	*
Car Battery Charger		844,357		159	*
Dual Polarity Power Supply		348,364		84	*
Fixed Voltage Power Supply		285,740		52	*
High Current Power Supply		306,502		65	*
High Voltage High Current Power Supply		229,071		35	*
LASER Power Supply		266,830		28
Portable CD Player Adapter For Car		187,399		12	*
Power Supply		703,340		259	*
Solid State Tesla Coil NEW!		125,285		4
Solid State Tesla Coil/High Voltage Generator		404,818		50
Transformerless Power Supply		433,978		117	*
Voltage Inverter		311,157		51	*
Voltage Inverter II		179,182		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		556,379		182
3 Watt FM Transmitter	Rae XL Tkacik	305,222		82	*
50 Watt Amplifier		476,929		74
8 Note Tune Player		121,052		12	*
8 Watt Audio Amp		341,251		67	*
Aircraft Radio Communications Receiver		244,878		49	*
Crystal Radio		143,124		53	*
Digital Volume Control		306,089		47	*
Electronic Stethoscope		283,648		141	*
FET Audio Mixer		314,887		41
FM Transmitter		955,521		419
Guitar Fuzz Effect		217,991		52	*
Microphone Mixer	Anatoly I. Shikhatov	224,628		26	*
Mono To Stereo Synthesizer	oRbEq	108,066		18	*
One Tube Regenerative Radio NEW!		113,366		4	*
Op Amp Radio		354,724		80	*
Single Chip AM Radio NEW!		84,766		2	*
Single Chip FM Radio NEW!		144,698		1	*
Sound Level Meter		315,502		51	*
Stereo Tube Amplifier	Weslee Kinsler	242,688		15	*
Tone Control		279,706		31
Transistor Organ		172,367		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		143,226		27	*
FM Telephone Bug		214,251		57
Phone Busy Indicator		193,063		24	*
Remote Telephone Ringer		98,741		3	*
Ringing Phone Light Flasher		189,809		34	*
Simple Phone Tap	Derek Tombrello	341,581		98	*
Telephone Hold Button		107,389		10
Telephone Recorder		190,934		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.