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# Emisar 2-channel driver connected to only 1 set of LEDs
The default Emisar D4S driver doesn't support a lighted switch, so for lights
built with one of those, Hank puts in a 2-channel driver instead... but he only
connects 1 set of LEDs.
This is an odd hardware configuration used only for special orders, I think.
The driver itself has 3 power channels:
1. Linear regulator 1
2. Linear regulator 2
3. Direct-drive FET
Channels 1 and 3 are connected to the main LEDs, while channel 2 is not
physically wired up to anything.
Two channel modes are included:
1. Linear only
2. Linear + DD FET
Channel mode 2 is default, and the only mode enabled after a factory reset.
Channel mode 1 is included in case anyone wants to turn off the DD FET.
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