most i/o pins cant handle 200ma. you fried the processor. It really helps to read the bone SRM to see the limitations.
you need buffers if you want to drive anything that high On 9/13/2018 4:43 AM, witop01 via BeagleBoard wrote: > > > 在 2015年3月6日星期五 UTC+8下午2:41:17，gr...@sensa.io写道： > > I wired up a circuit with an LED strip, 3 N-channel MOSFETs, and a > separate 12V power supply, with the gate pins on the MOSFETS > connected to I/O pins on the Beaglebone. > > When I didn't connect the circuit to the Bone ground, I apparently > fried 2 boards. Neither will boot up. One gives a flicker on the > power light and then goes off, and on the other the power light > turns on, but the other LEDs don't flash and I can't get into > either board. > > Here is the thread on the Adafruit forum with a photo of the > circuit: > > http://forums.adafruit.com/viewtopic.php?f=8&t=69691&p=353330&sid=eff0f5bd69bba9338e6f0ec2d7fa70c4#p353330 > > <http://forums.adafruit.com/viewtopic.php?f=8&t=69691&p=353330&sid=eff0f5bd69bba9338e6f0ec2d7fa70c4#p353330> > *The Adafruit support said that setup should not have hurt the > board. * > > I checked the voltage on the gate pin on each MOSFET that was > connected to the Bone and it was nominal (~200mA). > > Does anyone have any ideas on this? How could this have fried 2 > boards? > > Thanks for any help. > > And PS I posted this earlier today but didn't see it show up in > the forum. Sorry if it needed to be approved and you are getting a > duplicate. > > -- > 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 beagleboard+unsubscr...@googlegroups.com > <mailto:beagleboard+unsubscr...@googlegroups.com>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/c61f663c-e5c9-4a93-b5cf-dc8eb6974fea%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/c61f663c-e5c9-4a93-b5cf-dc8eb6974fea%40googlegroups.com?utm_medium=email&utm_source=footer>. > For more options, visit https://groups.google.com/d/optout. -- 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 beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/b78a9f70-c201-d669-b730-8aa7fca0ae21%40gmail.com. For more options, visit https://groups.google.com/d/optout.
