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Re: LED dimmers [message #303721 is a reply to message #303668] Sun, 17 July 2016 17:49 Go to previous messageGo to previous message
A Hamilto is currently offline  A Hamilto   United States
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Keith V wrote on Sun, 17 July 2016 16:50
...Both these scenarios leave no power to run the PWM...
I can sort of see it now.
If what you have at the switch location is the battery side of the light circuit, you would need another wire to ground to apply power to the PWM. If what you have at the switch location is the ground side of the LEDs, you need a 12V source run to the switch location. So no matter what you buy, you need to add a wire at the switch location to power the PWM.

And it is either a current source or a current sink on the switching side. So they call that switching high side (current source) or low side (current sink).

Now if I read the original post of this thread correctly, you need to turn that PWM from a current sink into a current source for it to work. Do I have it right yet?

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