LED Circuits - Fun to play with LED

• "Mini-Beacon" miniature programmable LED Flasher that is based around a PIC12F629 microcontroller
• "Peggy" - A Light Emitting Pegboard Display
• 1.5V LED flasher A (PDF)
• 1.5V LED flasher B (PDF)
• 10, 8 And 6 Step LED Circuits (CD4017)
• 12 Volt Knight Rider LED display
• 13 Color LED Rainbow
• 13 Color LED Rainbow
• 18 LED dimmable LED lamp
• 3V LED chaser using 4017
• 60 LED Clock
• 6V ultra-bright LED chaser using 74HC4017
• 7 Segment LED Counter
• 7 Segment LED Counter
• A "persistence of vision display" (POV display) using LEDs
• Adjustable flashing LED
• Assorted LED circuits
• AVR Color Clock using RGB LEDs
• Bedazzler: Do-it-yourself Handheld LED-Incapacitator (non-lethal weapon)
• Bicycle LED POV (persistence of vision display) LED display
• Bicycle rear flashing LED light
• Big 7-segment LED display board with SPI interface
• Christmas Star
• Christmas tree
• Color fade
• Colour Shifting For Bi-Colour LED's
• Current Regulators For Light Emitting Diodes
• Dancing LEDs
• Digital Up / Down Counter with 7-segment display
• Discrete LED Color Organ
• Driving led display matrix from a PIC micro
• Fading LEDs
• Fantastic Atom Expander
• Flashing LED advertising badge (PDF)
• Flashing LED advertising badge (PDF)
• Fun with LEDs - a variety of LED flahser projects
• Giant T-shaped LED matrix display board for financial applications containing 275 8x8 LED modules
• Heart of LEDs
• High Current Pulsed LED
• High Efficiency 12V White LED Driver
• High power LED driver using LTC3780
• Incandescent LED Circuit
• Kitt car scanning LED sequencer
• Knight rider scanning LED lights
• LED Audio VU Meter
• LED Chaser
• LED chaser
• LED Chaser using 4011 / 4017 CMOS chips
• LED color fade
• LED dimmer circuit
• Led display digital Voltmeter
• LED flasher using 4584 hex inverting Schmitt trigger
• LED flasher with "Rising and Falling" Brightness
• LED Mood Light
• LED Mood Light
• LED Running Message Display using CD4017 with transistor drivers rather than a CPU
• LED Thermometer
• LED Voltage Indicator Board
• LEDMATRIX, a 80x32 pixel DIY LED matrix display
• Little bike light using LEDs
• LM3909 replacement using discrete components
• Low battery voltage flasher (PDF)
• Low current LED flasher (PDF)
• Making an Amplified Color Sensor from an LED and an Op Amp
• Notes on using LEDs and various LED driver circuit diagrams
• Persistence of Vision Display for Bikes
• Pocket Ignignokt LED display
• PointLess LED Array - A 8 by 8 array displays something using POV
• POV Persistence Of Vision 2 x 32 LED display
• Pulsed LED test circuit (PDF)
• Regulated Dual White LED Lamp
• Robot beacon light display for mounting on top of a robot
• Running Message Display
• SAA1064 display module project
• Schematic and breadboard layout for reversed LED color sensor using an opamp
• Scrolling LED sign based on Atmel ATtiny2313 AVR microcontrolle
• Selecting of LED projects including a flashing Christmas tree
• Sequential flashing arrow circuit using a 4017, also includes a PCB layout
• Seven Component Regulated LED Lamp
• Seven Component Regulated LED Lamp
• Simplest LED Flasher Circuit using a 2N2222 transistor Simplest LED Flasher Circuit led
• Single and Two Cell White LED Drivers Without Inductors
• Single cell LED flasher with two-year battery life (LM3909 replacement)
• Sky writer - displays 'in air' messages and features inertia switch
• Tiny micro-controller driven lightshow using LEDs and a Picaxe 18A (PDF)
• Using Common Cathode Or Anode LEDs As Bipolar LEDs
• Various LED flashers
• Various LM555 LED Blinker Circuits
• White LED circuits
• White LED Drive Circuit