"led"-tagged Public Circuits

LED Control circuit PUBLIC

Uses 2 potentiometers to control a LED. Powered by 5V, 6V, 6.3V, or 6.5V.

by kavirkurup | updated April 03, 2025

2n2222   5v-6_5v   led  

Led driver design PUBLIC

constant current led driver from 6v DC input. Controlled from Attiny85 PWM.

by cheperboy | updated July 06, 2019

led  

Led driver simulation PUBLIC

constant current led driver from 6v DC input. pwm provided by attiny85.

by cheperboy | updated July 06, 2019

led  

Led Flasher PUBLIC

This is a circuit which uses an npn and pnp transistor to briefly flash an LED every few seconds

by shagas | updated May 06, 2013

flasher   led   led-flasher   npn   pnp   timed   transistor  

LED Flasher PUBLIC

Status Indicator: Steady good, flashing bad.

by Watuckey | updated September 23, 2018

flasher   led  

LED Low Level Lighting PUBLIC

LED yard lighting. Used to illuminate back yard with enough light to navigate paths safely at night.

by RBClarke | updated March 11, 2016

constant-current-source   led  

LED multi string linear constant current sink 01 PUBLIC

DC Sweep doesn't simulate properly in CL for all values of R7. Time Domain simulation shows erroneous current spike at startup. See below.

by signality | updated April 15, 2013

constant-current-sink   constant-current-source   led   led-array   led-string  

LED multi string linear constant current sink 02 PUBLIC

An attempt to get the time domain sim of: LED multi string linear constant current sink 01 to work properly. It doesn't. Time Domain simulation still shows erroneous current spikes at startup.

by signality | updated April 15, 2013

constant-current-sink   constant-current-source   current-sink   led   led-array   led-string  

LED multi string linear constant current sink 03 PUBLIC

This slightly simplified version of: LED multi string linear constant current sink 01 simulates fine in DC Sweep and Time Domain.

by signality | updated April 15, 2013

constant-current-sink   constant-current-source   led   led-array   led-string  

LED Navigtation Lights PUBLIC

A voltage regulated LED flasher that emulates blinking navigation lights and strobes for a model airplane, or your favorite Starship.

by lsmith1437 | updated March 02, 2013

flasher   led   navigation  

LED Resistor PUBLIC

by olegyk | updated October 09, 2012

current-limiting   led   voltage-divider  

LED With A Capacitor PUBLIC

A fading LED circuit

by davidvale | updated February 25, 2013

capacitor   led  

LED1 PUBLIC

Basic LED circuit with a resistor

by davidvale | updated March 14, 2013

led   resistor  

led1 PUBLIC

Basic polarization circuit

by nliebeaux | updated July 19, 2013

led   ohms-law   qed123  

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  

LEDs with resistor biasing PUBLIC

LEDs are usually found with a resistor in series to select the desired current (and therefore brightness and power consumption).

by CircuitLab | updated June 07, 2017

bias-point   current-limiting   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  

magnetic switch/transistor PUBLIC

A circuit from a Forrest Mims III book. Comments welcome.

by ronneyg | updated September 05, 2016

led   transistor  

MAX7221 MAX7219 Binary Controller PUBLIC

by Kaptn_flint | updated August 13, 2015

binary   decoder   digit   display   led   segment  

mini booster PUBLIC

by sean_robot | updated April 05, 2013

boost   led