Re: LED dimmers [message #303726 is a reply to message #303721] |
Sun, 17 July 2016 20:35 |
Bullitthead
Messages: 1411 Registered: November 2013
Karma:
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Senior Member |
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The power to the load powers the PWM CIRCUITRY. It is not a discreet electronic component and needs power and ground to function. The PWM circuit varies the conduction time of the negative lead coming from the load. In fact, the power lead coming out of the PWM does not have to continue on to the load, and does not even have to be connected to anything. The load can be powered separately as long as the ground of both power sources is common. The PWM circuit can still impose a waveform on the negative return line from the load, no matter where the load gets its power from.
Terry Kelpien
ASE Master Technician
73 Glacier 260
Smithfield, Va.
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