Programmable-Brightness LED Control

This simple op amp circuit can be used to control the brightness of a LED. By placing the LED in the op amp feedback, it is driven  in a constant- current mode. This eliminates the diode forward voltage temperature coefficient’s effect on its current and thus its  brightness over temperature.  This circuit is a voltage- controlled current source. (Circuit is created by Neil P. Albaugh,  TI – Tucson)

Programmable-Brightness LED Control circuit:

Programmabe-brightness LED control-blog

Online Simulation of the Programmable-Brightness LED Control Circuit

The great feature of the TINA circuit simulator that you can analyze this circuit immediately with TINACloud the online version of TINA. Of course you can also run this circuit in the off-line version of TINA.

Click here to invoke TINACloud  and analyze the circuit, or watch our tutorial video!

You can send this link to any TINACloud customers and they can immediatelly load it by a single click and then run using TINACloud.

Michael Koltai