Quote:
Originally Posted by PeterN
Sounds good - can you give us some more info on the actual specs for your controller?
Cheers,
Peter
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Hi peter...a very simple one at that.
I designed it for 5 Amps max. The P channel FETs can take much more but I limited it to this with the design of the PCB tracks in consideration & my needs in consideration This was originally just done for myself, cheap & simple & safe but it has taken on a life of itself.
PCB tracks can be changed but atm around 48 watts max is a fair power draw.
Just uses LEDs & pots for varying PWM output. Output is very linear from in I draw aqcross it's range. I mucked around with lots of PWM frequencies but settled on a low freq, below 10Hz as it provides the best visual feeback on pulsing LEDs. Low freq all so helps reduce noise onto the power lines.
No current foldback only fuse protection. I did consider it but decided not. There are current limit protected FTEs available but the I am really after a cheap simple solution.
No undervolts as well....although this is something I am going look into.
All is up in the air until I receive my cct boards.
I am looking at making this a 6 channel PWM, easy enough & allows more complexity with a bigger ccct board.