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
Thursday, April 03, 2025		 Parallel (Printer) Port Interface45
FM Transmitter18
Yesterday
Wednesday, April 02, 2025		 Transistor Organ49
12VDC To 120VAC Inverter35
Of All Time 12VDC To 120VAC Inverter1,544,647
FM Transmitter1,019,347

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 230,571 61 *
Car Alarm Arming Horn Beep Canceller bob 139,826 6 *
Wireless Auto Tachometer 347,281 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 163,195 29 *
Parallel (Printer) Port Interface 291,884 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 452,765 63 *
3 Channel Spectrum Analyzer 226,874 20
40W Fluorescent Lamp Inverter Bart Milnes 334,075 60 *
Adjustable Strobe Light 313,948 36
Black Light 287,313 29
Colour (Sound) Organ 295,675 36
Electronic Dice NEW! 193,177 10 *
Fantastic Atom Expander 206,472 25
Flash Slave Trigger 225,639 18 *
Infa-Red Remote Control 642,433 216 *
IR Remote Extender NEW! 136,903 3 *
IR Remote Jammer Carl 271,148 110 *
IR Remote Switch NEW! 161,230 9 *
LASER Transmitter/Receiver 422,590 92
LED Chaser 451,681 83 *
LED Metronome NEW! 103,232 3 *
LED Thermometer 210,632 22 *
Light/Dark Detector 309,853 90 *
Simple Colour Organ 140,876 11 *
Strobe Light 279,684 27 *
TRIAC Light Dimmer 558,831 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 365,109 122 *
Electromagnetic Levitator NEW! 148,201 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 929,167 214 *
AC Motor Speed Controller 398,378 29 *
Air Flow Detector 255,904 54 *
Digital Keypad Combination Lock 205,863 20
Low Voltage Alarm 233,323 58 *
Pine Racecar Victory Judge 106,081 1 *
Pulse Width Modulation DC Motor Control 660,666 94
Rain Detector 309,239 112 *
Simple Lie Detector 570,135 323
Simple Polarity Tester Dudley LeRoux 169,381 13 *
Simple Servo Controller 225,864 22 *
Simple Touch Switch NEW! 174,097 6 *
Simple Two Speed Contactor DC Motor Controller 209,411 21 *
Stepper Motor Controller 756,109 120 *
Time Delay Relay 560,915 88
Time Delay Relay II jawaharlal@excite.com 251,821 39 *
Touch Switch 294,309 51 *
Video Activated Relay 125,496 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 185,932 10 *
Water Detector With Sump/Bilge Pump Controller 157,029 18 *
Wire Loop Alarm Alex Meaden 209,503 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 323,400 25 *
12VDC To 120VAC Inverter 1,544,647 691
6V to 12V Converter 534,077 121
Automatic 12V Lead Acid Battery Charger 943,875 248
Automatic Load Sensing Power Switch 171,766 16 *
Car Battery Charger 889,234 159 *
Dual Polarity Power Supply 376,356 84 *
Fixed Voltage Power Supply 316,316 52 *
High Current Power Supply 345,931 66 *
High Voltage High Current Power Supply 268,757 35 *
LASER Power Supply 301,561 28
Portable CD Player Adapter For Car 216,433 12 *
Power Supply 745,242 259 *
Solid State Tesla Coil NEW! 151,674 4
Solid State Tesla Coil/High Voltage Generator 451,151 51
Transformerless Power Supply 468,466 117 *
Voltage Inverter 346,764 51 *
Voltage Inverter II 208,221 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 590,649 182
3 Watt FM Transmitter Rae XL Tkacik 342,552 83 *
50 Watt Amplifier 514,194 74
8 Note Tune Player 144,713 12 *
8 Watt Audio Amp 379,796 67 *
Aircraft Radio Communications Receiver 285,157 50 *
Crystal Radio 164,034 53 *
Digital Volume Control 343,943 47 *
Electronic Stethoscope 327,315 142 *
FET Audio Mixer 348,919 41
FM Transmitter 1,019,347 420
Guitar Fuzz Effect 253,048 54 *
Microphone Mixer Anatoly I. Shikhatov 255,521 26 *
Mono To Stereo Synthesizer oRbEq 138,994 18 *
One Tube Regenerative Radio NEW! 152,044 4 *
Op Amp Radio 396,153 80 *
Single Chip AM Radio NEW! 104,214 4 *
Single Chip FM Radio NEW! 178,091 1 *
Sound Level Meter 347,097 51 *
Stereo Tube Amplifier Weslee Kinsler 273,384 15 *
Tone Control 315,040 31
Transistor Organ 205,028 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 167,315 27 *
FM Telephone Bug 238,884 57
Phone Busy Indicator 217,841 24 *
Remote Telephone Ringer 121,789 3 *
Ringing Phone Light Flasher 223,679 35 *
Simple Phone Tap Derek Tombrello 387,813 98 *
Telephone Hold Button 132,846 10
Telephone Recorder 220,678 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.