CC led driver

161

02:27:48

This is just a simple constant current led driver there are many different ways to do this. Constructive comments only please. Any questions feel free I'm here to help

published 11 years ago

myHP

11 years ago

I'm trying to replicate this circuit for a 3w rgb led connected to an Arduino.. I'm confused about the 10v power source, the led has a 4v max forward voltage, 350/350/400mA max current. When I change the voltage, shouldn't the current going through the leds stay the same? I'm using a 12v supply for my application. Any help appreciated

Dufniall89

11 years ago

This is constant current. The resistor connecting to the base and emitter is calculated using .7 vdc and the current of the led at that voltages. The other resistor is the bias resistor or on|off signal

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.