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GriffinRU
RC-Monster Aluminum
 
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Posts: 748
Join Date: Oct 2005
05.18.2007, 03:51 PM

Quote:
Originally Posted by AAngel
Griffin, thanks. I understood SOME of that.

With regard to the FET "gates," I'm assuming that the gates are actually traces on the pcb, or are they a component. Now adding resistors, where? What values would I need? I have a pretty good selection of SMT resistors, but would just as soon glue them to the heatsink, because I have no idea. I'm like a backyard mechanic. I can replace parts because they've gone bad, but don't necessarily have a full appreciation of the internal workings of an internal combustion engine.

As for the "boost" caps, are you referring to those cap mounted next to the heatsink? I believe that those are of the 220uf 25v variety. Would the 330uf 35v caps that I got suffice?

It's really going to kill me if I suffer through all of this, provided that I can get a clue, and Castle releases the MMM.
No, gates are pins on FET chip.
Well, there are couple ways how you can achieve that, first we can just add resistor in between gate pins (quick and easy bad) another way (good) would be cut the trace install resistor in place and then install second resistor in star type connection and connect it to other gate. It is pretty simple on the board but sounds complicating in explaining how-to. Also I am not ready to recommend that yet, I need to do some research with Mamba ESC.
Boost caps are not the big ones on the side, they actually small ones responsible for high side FET's drivers. I need to measure them first and then verify if their capacitance sufficient to drive additional number of FET's.
   
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