Dear friends,

I have to control the voltage across an LED
(brightness) connected to 2051.

Kindly give me an idea what can be done ?

I already have a similar application


+5 VOLTS
/|
|
|
________|
| |
100 uF | |
25 Volt |+ |
__|__ __|__
_____ / LED
| /
| __|__
| |
| |
|
|
| /
| /
|
| 580 OHM
| /
| /
| |
| |
| |
______|_______|
|
|
| 580 OHM
|______/ / / /
/ / / _______ PORT P1.4
/ PIN 16 OF 2051




Can somebody explain what is the code behind this circuit
that controls the brightness of the LED.

Do you think that the brightness fixed remain there for a
long long period.

Thank you

Babar/