Electronic Circuits

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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 30, 2025		 12VDC To 120VAC Inverter71
Rain Detector20
Yesterday
Tuesday, April 29, 2025		 12VDC To 120VAC Inverter52
FM Transmitter29
Of All Time 12VDC To 120VAC Inverter1,545,986
FM Transmitter1,020,086

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 230,847 61 *
Car Alarm Arming Horn Beep Canceller bob 140,083 6 *
Wireless Auto Tachometer 347,619 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 163,453 29 *
Parallel (Printer) Port Interface 292,278 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 453,147 63 *
3 Channel Spectrum Analyzer 227,301 20
40W Fluorescent Lamp Inverter Bart Milnes 334,372 60 *
Adjustable Strobe Light 314,361 36
Black Light 287,792 29
Colour (Sound) Organ 296,022 36
Electronic Dice NEW! 193,497 10 *
Fantastic Atom Expander 206,756 25
Flash Slave Trigger 225,960 18 *
Infa-Red Remote Control 642,850 216 *
IR Remote Extender NEW! 137,225 3 *
IR Remote Jammer Carl 271,560 110 *
IR Remote Switch NEW! 161,522 9 *
LASER Transmitter/Receiver 423,043 92
LED Chaser 452,081 83 *
LED Metronome NEW! 103,528 3 *
LED Thermometer 210,920 22 *
Light/Dark Detector 310,138 90 *
Simple Colour Organ 141,147 11 *
Strobe Light 280,014 27 *
TRIAC Light Dimmer 559,239 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 365,495 122 *
Electromagnetic Levitator NEW! 148,486 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 929,720 214 *
AC Motor Speed Controller 398,864 29 *
Air Flow Detector 256,199 54 *
Digital Keypad Combination Lock 206,123 20
Low Voltage Alarm 233,611 58 *
Pine Racecar Victory Judge 106,350 1 *
Pulse Width Modulation DC Motor Control 661,083 94
Rain Detector 309,605 112 *
Simple Lie Detector 570,571 323
Simple Polarity Tester Dudley LeRoux 169,662 13 *
Simple Servo Controller 226,251 22 *
Simple Touch Switch NEW! 174,405 6 *
Simple Two Speed Contactor DC Motor Controller 209,751 21 *
Stepper Motor Controller 756,869 120 *
Time Delay Relay 561,346 88
Time Delay Relay II jawaharlal@excite.com 252,120 39 *
Touch Switch 294,682 51 *
Video Activated Relay 125,755 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 186,261 10 *
Water Detector With Sump/Bilge Pump Controller 157,294 18 *
Wire Loop Alarm Alex Meaden 209,805 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 323,906 25 *
12VDC To 120VAC Inverter 1,545,986 691
6V to 12V Converter 534,551 121
Automatic 12V Lead Acid Battery Charger 944,356 248
Automatic Load Sensing Power Switch 172,062 16 *
Car Battery Charger 889,697 159 *
Dual Polarity Power Supply 376,749 84 *
Fixed Voltage Power Supply 316,620 52 *
High Current Power Supply 346,406 66 *
High Voltage High Current Power Supply 269,103 35 *
LASER Power Supply 301,927 28
Portable CD Player Adapter For Car 216,744 12 *
Power Supply 745,733 259 *
Solid State Tesla Coil NEW! 152,065 4
Solid State Tesla Coil/High Voltage Generator 451,704 51
Transformerless Power Supply 468,881 117 *
Voltage Inverter 347,362 51 *
Voltage Inverter II 208,607 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 591,058 182
3 Watt FM Transmitter Rae XL Tkacik 343,022 83 *
50 Watt Amplifier 514,637 74
8 Note Tune Player 145,002 12 *
8 Watt Audio Amp 380,237 67 *
Aircraft Radio Communications Receiver 285,594 50 *
Crystal Radio 164,452 53 *
Digital Volume Control 344,299 47 *
Electronic Stethoscope 327,685 142 *
FET Audio Mixer 349,335 41
FM Transmitter 1,020,086 420
Guitar Fuzz Effect 253,525 54 *
Microphone Mixer Anatoly I. Shikhatov 255,876 26 *
Mono To Stereo Synthesizer oRbEq 139,337 18 *
One Tube Regenerative Radio NEW! 152,694 4 *
Op Amp Radio 396,662 80 *
Single Chip AM Radio NEW! 104,534 4 *
Single Chip FM Radio NEW! 178,507 1 *
Sound Level Meter 347,486 51 *
Stereo Tube Amplifier Weslee Kinsler 273,742 15 *
Tone Control 315,385 31
Transistor Organ 205,407 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 167,577 27 *
FM Telephone Bug 239,166 57
Phone Busy Indicator 218,144 24 *
Remote Telephone Ringer 122,033 3 *
Ringing Phone Light Flasher 224,052 35 *
Simple Phone Tap Derek Tombrello 388,130 98 *
Telephone Hold Button 133,128 10
Telephone Recorder 220,991 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.