1st of all IF you used the FETs shown on Adafruit they are logic level FETs, so you can drive them directly from the BB.
Resistors are only required if you had used the transistors instead of the FETs. As discussed you missed the GND wire (Black) as shown on Adafruit. Where did you measure the 200mV? From the BB GND to the outputs or elsewhere? As you don't have a common GND readings are pretty much meaningless. FETs have a "large" capacitance on the Gate, without a common ground you could have several hundred (or thousands) volts of static charge for a very short period, but it could be large enough to kill the processor. Very likely if you have carpets around. If you unplug everything you added to the BB will it boot up again? If not the above may be possible. You seem to be using P9_12, P9_16 and P9_21 they should be safe to use as I'm using them on a couple of projects without problems, you MUST add the GND wire from any pin 1 or 2 of either P8 or P9 to the GND track of your breadboard. I may think of something else later on....... meanwhile, as I said above, unplug everything from the BB and see if it powers up, if not it's shopping time again. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
