PWM LED control

alnajjar1

I am using BS2 to dim an LED strip that uses 12V with maximum of 14W (about 1.1A). I have used the PWM on the BS2 quite a bit but wanted to know the best method to have the signal from the BS2 controlling the light intensity. I was thinking of using a Darlington Transistor like the TIP120 but wanted some feedback from the experts.

much appreciated.

Al

Peter KG6LSE

can you switch the low side of your lights? . MOSFETs are Very good at switching .

and are you using the PWM command or Pulseout . I have found the latter works better .

http://www.flickr.com/photos/peterthethinker/4794741329/in/set-72157623214411145/

' {$STAMP BS2}
' {$PBASIC 2.5}


Part1 VAR WORD
Part2 VAR WORD
Part3 VAR WORD
Part4 VAR WORD


DO
'READ POT
HIGH 1
PAUSE 1
RCTIME 1,1, Part1
'DO math
Part2 = Part1 + 45
Part3 = Part2 * 106
Part4 = Part3 - 4876
'DO out
PULSOUT 10 , Part4

DEBUG DEC part4 ,CR

LOOP