"led"-tagged Public Circuits

Raspberry Pi LED Output PUBLIC

Circuit showing how to control an LED from a Raspberry Pi GPIO pin configured as an output.

by MattHawkins | updated July 13, 2012

gpio   led   output   raspberry-pi   rpi  

240V_50Hz_LED lamp PUBLIC

The lamp is made using an dead CFL body. The lamp is already in place & working very fine with brightness equivalent to 40W incandescent lamp. The energy consumption is almost NIL, as the energy meter...

by k.rajnikant | updated May 27, 2012

bridge-rectifier   led   led-array  

Infrared Counting Circuit 1 Digit PUBLIC

A functioning counting circuit. While the space between the IR LED and the IR Phototransistor is unblocked the number stays. When blocked, it increments by one.

by lucasmoten | updated May 20, 2012

311   7414   7447   7490   count   infrared   led  

Light Sensitive Counter Circuit PUBLIC

A possibly complete light sensitive counting circuit with 3 digits making use of 311, 7414, 7490, and 7447 ICs and 7-segment displays.

by lucasmoten | updated May 15, 2012

311   7-segment-display   7414   7447   7490   de-bounce   digital   led   phototransitor   schmitt-trigger  

LedDriveDC PUBLIC

Almost lossless LED powering circuit directly from mains (transformer-less)

by ettore_galli | updated April 27, 2012

led   lighting   lossless   lux-perpetua   mains   transformerless  

Renen's Blue LED (2.7V, 20mA) PUBLIC

Attempting to model a blue high-intensity LED which draws about 20mA at 2.7V bias.

by mrobbins | updated April 20, 2012

device-modeling   diode   led  

Two LEDs: separate vs shared resistor PUBLIC

Two LEDs driven by a shared vs separate resistors -- how does current split if the two LEDs are slightly different?

by mrobbins | updated April 05, 2012

diode   led  

JT Flashlight Conversion PUBLIC

by qs | updated April 02, 2012

flashlight   joule   joule-thief   led   light   thief  

LED Array Modul PUBLIC

by byutea | updated March 30, 2012

constan-current-source   led   led-array  

Variable Control By Light Control Circuit PUBLIC

LED lights based upon resistance of photoresistor and potentiometer

by lucasmoten | updated March 30, 2012

led   npn   photoresistor   potentiometer  

My LED bulb PUBLIC

This is my LED bulb which runs on AC 240V mains and is deployed on my porch. The LED used here are 8mm 0.5W 150mA bright White color.

by k.rajnikant | updated March 30, 2012

led   led-lamp   mains-led-bulb  

Common Anode - 7 Segment Display PUBLIC

A basic diagram of a common anode 7-segment-display representing that all LEDs are powered by common voltage in.

by lucasmoten | updated March 27, 2012

7-segment-display   anode   ic   led  

Common Cathode - 7 Segment Display PUBLIC

A basic diagram of a common cathode 7-segment-display representing that all LEDs lead to ground. Resistors should typically be added between power and input pins.

by lucasmoten | updated March 27, 2012

7-segment-display   cathode   ic   led  

Basic LED Circuit PUBLIC

by lucasmoten | updated March 26, 2012

9v   battery   calculate   formula   led   ohms-law   resistor  

Dual LED Flasher - Forrest Mims Design PUBLIC

This is from Forrest Mims book. Flashes Dual LEDS. I wanted to use a proven known schematic to learn Circuit Lab.

by kryton9 | updated March 13, 2012

flash   led  

Simple JT Flasher with Daylight sensing PUBLIC

An attention grabbing Joule-Thief blinker using a single transistor and shuts off during daylight.

by qs | updated March 13, 2012

blinking   flasher   joule   joule-thief   led   thief  

MultiVibrator Circuit PUBLIC

Alternately flashed between red and green LEDs.

by RfbxTixZKBq2 | updated March 11, 2012

led  

Fading Led PUBLIC

by RfbxTixZKBq2 | updated March 11, 2012

555   fading-led   led  

1-watt Joule Thief PUBLIC

A high-power Joule Thief type circuit to drive a 1watt LED from a 1.5 volt source. A suitable driver transistor, like the 2SD965, 2SC2500, 2SC2655 MUST be used! The second winding has been replaced by...

by qs | updated March 10, 2012

joule   joule-thief   led   power   thief  

Arduino Blink Circuit Simulation PUBLIC

by SpinStabilized | updated March 09, 2012

arduino   blink   led   tutorial