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 in which
the brightness of LED is controlled from port
P1.4 (pin 16 of 2051).


+5Volts
/| LED 580 OHM
|______||____////______
| |/| |
| |
| | | |
|__________| |____________|
| | |
+ | | 100uF |
25 Volts |
P1.4 |
/_______/////_________|
580 OHM



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

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

Thank you

Babar/