There are 99 circuit schematics available in this category. Click here for all circuit diagrams. The Last circuit was added on Saturday, January 28, 2023.Please note some adblockers will suppress the schematics as well as the advertisement so please disable if the schematic list is empty.

Filter schematics by description:

CircuitCategoryDate AddedOK?Votes 
Single and Two Cell White LED Drivers Without InductorsLEDSep 13, 2024Status2 vote up vote down
Bicycle rear flashing LED lightLED Status4 vote up vote down
Little bike light using LEDsLED Status1 vote up vote down
Digital Up / Down Counter with 7-segment displayLED Status-2 vote up vote down
LED flasher with "Rising and Falling" BrightnessLEDSep 23, 2024Status0 vote up vote down
12 Volt Knight Rider LED displayLEDSep 23, 2024Status-5 vote up vote down
Bicycle LED POV (persistence of vision display) LED displayLED Status-1 vote up vote down
Advanced LED temperature indicatorLEDOct 25, 2024Status4 vote up vote down
LED Chaser using 4011 / 4017 CMOS chipsLED Status-2 vote up vote down
Fading LEDsLED Status0 vote up vote down
Dancing LEDs circuit diagramLED Status-1 vote up vote down
Seven Component Regulated LED LampLED Status3 vote up vote down
LED Mood LightLED Status-3 vote up vote down
13 Color LED Rainbow circuit diagramLED Status5 vote up vote down
60 LED ClockLED Status-2 vote up vote down
Ring-Around LED FlasherLEDJan 08, 2025Status0 vote up vote down
LM3909 replacement using discrete componentsLEDFeb 14, 2025Status-1 vote up vote down
10, 8 And 6 Step LED Circuits (CD4017)LEDSep 10, 2024Status0 vote up vote down
Using Common Cathode Or Anode LEDs As Bipolar LEDsLED Status0 vote up vote down
Colour Shifting For Bi-Colour LED'sLEDSep 10, 2024Status-3 vote up vote down
Current Regulators For Light Emitting DiodesLEDSep 10, 2024Status-1 vote up vote down
Incandescent LED CircuitLEDSep 10, 2024Status0 vote up vote down
Various LM555 LED Blinker CircuitsLEDSep 10, 2024Status1 vote up vote down
Voltage boost and buck circuits using Atmel AVR Tiny13V for driving a white LEDLEDMar 09, 2025Status-2 vote up vote down
LED Voltage Indicator BoardLED Status-3 vote up vote down
Sequential flashing arrow circuit using a 4017, also includes a PCB layoutLEDFeb 26, 2025Status0 vote up vote down
Notes on using LEDs and various LED driver circuit diagramsLEDFeb 26, 2025Status2 vote up vote down
YoYo enhancement device using a PIC12F629 to provide LED lighting effectsLEDMay 24, 2024Status-1 vote up vote down
LED driving and controlling methods including constant current drivers and PWM brightness controlLEDJul 11, 2024Status-1 vote up vote down
Single cell LED flasher with two-year battery life (LM3909 replacement)LED Status-1 vote up vote down
Linear constant current source dimmer for a white 24-LED arrayLEDMar 03, 2025Status2 vote up vote down
Simple current limiting for LED flashlightsLEDMar 03, 2025Status0 vote up vote down
Constant current LED driver schematic using a pair of BC547 transistorsLEDJul 11, 2024Status-1 vote up vote down
Pocket Ignignokt LED displayLED Status1 vote up vote down
Flashing LED circuit using 555 timerLEDJul 03, 2024Status0 vote up vote down
Fantastic Atom ExpanderLEDSep 01, 2024Status1 vote up vote down
LED ChaserLEDSep 01, 2024Status0 vote up vote down
7 Segment LED CounterLEDSep 01, 2024Status1 vote up vote down
LED ThermometerLEDSep 01, 2024Status1 vote up vote down
Driving led display matrix from a PIC microLED Status-2 vote up vote down
White LED Drive CircuitLED Status-1 vote up vote down
Simplest LED Flasher Circuit using a 2N2222 transistor Simplest LED Flasher Circuit ledLED Status-1 vote up vote down
White LED StroboscopeLEDFeb 25, 2025Status1 vote up vote down
Constant current LED driver circuit using LM334 plus a transistorLEDJul 11, 2024Status0 vote up vote down
1.5V LED flasher B (PDF)LEDJan 26, 2025Status1 vote up vote down
Low current LED flasher (PDF)LEDJan 26, 2025Status0 vote up vote down
1.5V LED flasher A (PDF)LEDJan 26, 2025Status1 vote up vote down
Flashing LED advertising badge (PDF)LEDJan 26, 2025Status0 vote up vote down
Flashing LED advertising badge (PDF)LEDNov 17, 2024Status0 vote up vote down
Pulsed LED test circuit (PDF)LEDJan 26, 2025Status1 vote up vote down
Low battery voltage flasher (PDF)LEDJan 26, 2025Status2 vote up vote down
White LED LampLEDNov 13, 2024Status-1 vote up vote down
Running Message DisplayLED Status0 vote up vote down
Discrete LED Color OrganLED Status0 vote up vote down
BCD to 7 Segment LED Display Decoder CircuitLEDApr 26, 2024Status1 vote up vote down
Circuit diagram of 3V LED chaser using 4017LEDFeb 21, 2025Status0 vote up vote down
6V ultra-bright LED chaser using 74HC4017LEDFeb 21, 2025Status0 vote up vote down
Led display digital VoltmeterLEDFeb 21, 2025Status0 vote up vote down
Peggy - A Light Emitting Pegboard DisplayLED Status-2 vote up vote down
Heart of LEDsLEDOct 23, 2024Status1 vote up vote down
Christmas StarLEDOct 23, 2024Status-1 vote up vote down
Christmas treeLEDOct 23, 2024Status-1 vote up vote down
Giant T-shaped LED matrix display board for financial applications containing 275 8x8 LED modulesLEDOct 25, 2024Status-1 vote up vote down
LEDMATRIX, a 80x32 pixel DIY LED matrix displayLED Status1 vote up vote down
POV Persistence Of Vision 2 x 32 LED displayLED Status1 vote up vote down
Constant current LED driver circuit using an NPN transistor to control an N-channel MOSFETLEDJul 11, 2024Status0 vote up vote down
LED Modulation Circuits including 5MHz and 50MHz versionsLEDApr 17, 2024Status0 vote up vote down
Bedazzler: Do-it-yourself Handheld LED-Incapacitator (non-lethal weapon)LEDOct 12, 2024Status0 vote up vote down
Persistence of Vision Display for BikesLEDOct 12, 2024Status0 vote up vote down
Mini-Beacon - miniature programmable LED Flasher that is based around a PIC12F629 microcontrollerLED Status0 vote up vote down
Automatic LED display dimmer using a LED as a light sensorLEDJun 27, 2024Status-2 vote up vote down
PointLess LED Array - A 8 by 8 array displays something using POVLED Status0 vote up vote down
A "persistence of vision display" (POV display) using LEDsLED Status1 vote up vote down
White LED circuitsLEDOct 13, 2024Status0 vote up vote down
Assorted LED circuitsLEDMar 18, 2024Status0 vote up vote down
LED dimmer circuitLED Status-1 vote up vote down
AVR Color Clock using RGB LEDsLED Status0 vote up vote down
Alphanumeric Led Display ProjectLEDNov 02, 2024Status0 vote up vote down
How to Control LED Brightness with a PWM Circuit using a 74AC14LEDApr 17, 2024Status-1 vote up vote down
Making an Amplified Color Sensor from an LED and an Op AmpLED Status0 vote up vote down
Schematic and breadboard layout for reversed LED color sensor using an opampLEDAug 12, 2024Status1 vote up vote down
LED flasher using 4584 hex inverting Schmitt triggerLEDAug 17, 2024Status1 vote up vote down
SAA1064 display module projectLEDSep 25, 2024Status0 vote up vote down
Regulated 12V Dual LED LampLEDMay 19, 2024Status1 vote up vote down
Regulated Dual 3 Watt White LED LampLEDMay 18, 2024Status0 vote up vote down
Regulated 24 Watt Broad Spectrum LED LampLEDMay 19, 2024Status0 vote up vote down
13 Color LED Rainbow circuit schematicLEDSep 21, 2024Status-1 vote up vote down
18 LED dimmable LED lamp circuit diagramLEDSep 07, 2024Status0 vote up vote down
Regulated Dual White LED LampLEDSep 07, 2024Status0 vote up vote down
Seven Component Regulated LED LampLEDSep 21, 2024Status0 vote up vote down
High Efficiency 12V White LED DriverLEDSep 21, 2024Status0 vote up vote down
LED Mood LightLEDJul 12, 2024Status0 vote up vote down
Simple LED Constant Current Lighting CircuitLEDJul 11, 2024Status-1 vote up vote down
LED Noughts And CrossesLEDOct 22, 2024Status-2 vote up vote down
LED Chaser Provides Three Game FunctionsLEDOct 22, 2024Status1 vote up vote down
Low-Cost Dual Digital DiceLEDOct 22, 2024Status-1 vote up vote down
Digital Logic Based LED Christmas Tree with 64 LEDs (constructed vertically from circuit board)LEDMay 01, 2024Status0 vote up vote down
Optical LED TransmitterLEDOct 20, 2024Status1 vote up vote down
Microscope conversion to LED-Light with two transistor current sourceLEDOct 29, 2024Status-1 vote up vote down