by Ischcuch » Thu Jul 04, 2013 9:09 pm
Ok, after some digging I have come to the following conclusion:
Level high can be used for the input signal in two ways:
1 pwm: square wave digital signal for power control. No other connections are required except for cooling interlock.
2 analogue: level high +5v provides on / off signal and a pot wired between 5v and input provides analogue power control when the on signal is active.
Am I on the right track? Any help will be appreciated.