Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

LED intensity Driving

Status
Not open for further replies.

tiwari.sachin

Full Member level 6
Joined
Aug 1, 2009
Messages
336
Helped
3
Reputation
6
Reaction score
3
Trophy points
1,298
Location
India
Activity points
4,407
I am using a photodiode for one of my application. I need to change the intensity of the LED.

How can I control the same

I am connecting the Anode to 3.3V via a resistor (Value not sure)

The specs of LED is as below



- - - Updated - - -

Are there any ICs thats 1 bit Constant-Current LED Sink Driver
 

Audioguru

Advanced Member level 5
Joined
Jan 19, 2008
Messages
9,239
Helped
2,136
Reputation
4,266
Reaction score
1,960
Trophy points
1,393
Location
Toronto area of Canada
Activity points
58,065
An LED does not need a constant current if its supply voltage does not change, a resistor will provide it with a constant current. The value of the resistor is simply calculated with Ohm's Law, but the forward voltage of the LED has a very wide range from 0.9V to 1.3V so you might need to measure it first.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top