On Wednesday, June 22, 2011 12:24:45 AM Karl Cunningham did opine: > One bit of caution. The speed controls I've seen built into power tools > are not isolated from the line voltage. So expect to have to isolate > (optical or otherwise) any control signal between its source and the > speed controller in the tool. > > Karl > Precisely why I used the PMDX-106, its control is opto-isolated.
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