On 10/3/2011 2:35 PM, M.L. wrote: > On Mon, Oct 3, 2011 at 12:14 PM, Joe Wronski = wrote: >> Hi, I have a 400W motor controller that is in a metal box and it is >> potted. I'm curious if there are techniques to remove the potting. The >> box is approx 2"x2.5"x1". The 2"x2.5" dimension is open and the potting >> is (up to) 1" deep. >> Background: This is for a 24V 400W DC brushed motor on a ThinkMobility >> Funbike. I've found little documentation on the bike. The controller >> has input lines from pedelec and speed sensor, as well as a cable from >> the handlebar mounted "brain". Wiring everything to the battery results >> in no lights on brain and no power to the motor. I'm looking at generic >> controllers on eBay ranging from $32 to $60. I don't currently have the >> tech shop or junkbox to just wire something up. >> >> Joe W > Joe, is your goal to repair the motor controller? > Yes, repair or re-work. At least get access to the power transistors=20 and heat sink, for possible re-use. If they're blown, at least I'd have=20 a starting point for a new controller with the circuit board and heat sink. Joe W --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .