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 Wednesday, April 24, 2024	Simple Lie Detector	8
	Microphone Mixer	8
Yesterday Tuesday, April 23, 2024	12VDC To 120VAC Inverter	41
	Infa-Red Remote Control	36
Of All Time	12VDC To 120VAC Inverter	1,531,599
	FM Transmitter	1,009,334

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		227,624		61	*
Car Alarm Arming Horn Beep Canceller	bob	137,206		6	*
Wireless Auto Tachometer		343,750		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	160,503		29	*
Parallel (Printer) Port Interface		286,555		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		448,405		63	*
3 Channel Spectrum Analyzer		222,493		20
40W Fluorescent Lamp Inverter	Bart Milnes	330,862		60	*
Adjustable Strobe Light		309,742		36
Black Light		281,460		29
Colour (Sound) Organ		291,414		36
Electronic Dice NEW!		189,915		10	*
Fantastic Atom Expander		203,660		25
Flash Slave Trigger		221,927		18	*
Infa-Red Remote Control		637,955		216	*
IR Remote Extender NEW!		133,440		3	*
IR Remote Jammer	Carl	266,904		110	*
IR Remote Switch NEW!		158,366		9	*
LASER Transmitter/Receiver		417,277		92
LED Chaser		446,771		83	*
LED Metronome NEW!		100,148		3	*
LED Thermometer		207,471		22	*
Light/Dark Detector		306,871		90	*
Simple Colour Organ		138,199		11	*
Strobe Light		276,579		27	*
TRIAC Light Dimmer		553,604		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		360,119		122	*
Electromagnetic Levitator NEW!		145,135		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		923,083		214	*
AC Motor Speed Controller		392,240		29	*
Air Flow Detector		252,535		54	*
Digital Keypad Combination Lock		203,041		20
Low Voltage Alarm		230,004		58	*
Pine Racecar Victory Judge		103,402		1	*
Pulse Width Modulation DC Motor Control		655,729		94
Rain Detector		305,454		112	*
Simple Lie Detector		565,433		323
Simple Polarity Tester	Dudley LeRoux	166,188		13	*
Simple Servo Controller		222,225		22	*
Simple Touch Switch NEW!		170,663		6	*
Simple Two Speed Contactor DC Motor Controller		205,991		21	*
Stepper Motor Controller		746,876		120	*
Time Delay Relay		556,434		88
Time Delay Relay II	jawaharlal@excite.com	247,823		39	*
Touch Switch		290,526		51	*
Video Activated Relay		122,531		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	182,079		10	*
Water Detector With Sump/Bilge Pump Controller		153,572		18	*
Wire Loop Alarm	Alex Meaden	206,478		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		316,911		25	*
12VDC To 120VAC Inverter		1,531,599		691
6V to 12V Converter		528,421		121
Automatic 12V Lead Acid Battery Charger		938,113		248
Automatic Load Sensing Power Switch		168,168		16	*
Car Battery Charger		884,085		159	*
Dual Polarity Power Supply		372,056		84	*
Fixed Voltage Power Supply		312,055		52	*
High Current Power Supply		339,895		66	*
High Voltage High Current Power Supply		264,839		35	*
LASER Power Supply		297,031		28
Portable CD Player Adapter For Car		213,198		12	*
Power Supply		739,418		259	*
Solid State Tesla Coil NEW!		147,253		4
Solid State Tesla Coil/High Voltage Generator		445,326		51
Transformerless Power Supply		463,970		117	*
Voltage Inverter		339,948		51	*
Voltage Inverter II		203,973		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		586,290		182
3 Watt FM Transmitter	Rae XL Tkacik	336,237		83	*
50 Watt Amplifier		508,695		74
8 Note Tune Player		141,479		12	*
8 Watt Audio Amp		373,840		67	*
Aircraft Radio Communications Receiver		279,435		49	*
Crystal Radio		159,746		53	*
Digital Volume Control		339,376		47	*
Electronic Stethoscope		322,129		142	*
FET Audio Mixer		344,476		41
FM Transmitter		1,009,334		420
Guitar Fuzz Effect		248,511		54	*
Microphone Mixer	Anatoly I. Shikhatov	251,475		26	*
Mono To Stereo Synthesizer	oRbEq	134,661		18	*
One Tube Regenerative Radio NEW!		143,282		4	*
Op Amp Radio		389,832		80	*
Single Chip AM Radio NEW!		100,635		3	*
Single Chip FM Radio NEW!		173,538		1	*
Sound Level Meter		342,880		51	*
Stereo Tube Amplifier	Weslee Kinsler	269,199		15	*
Tone Control		310,643		31
Transistor Organ		200,574		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		164,407		27	*
FM Telephone Bug		236,217		57
Phone Busy Indicator		214,773		24	*
Remote Telephone Ringer		119,100		3	*
Ringing Phone Light Flasher		219,282		35	*
Simple Phone Tap	Derek Tombrello	384,450		98	*
Telephone Hold Button		129,907		10
Telephone Recorder		217,457		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.