power your arduino from 3v3, It'll do fine. LP
On Thursday, May 29, 2014 6:38:48 PM UTC+2, [email protected] wrote: > > Hi! > > I currently have an Arduino Mega 2560, and have pre-ordered one of the new > BBB rev C's. The Arduino collects data from environmental sensors placed > around our house, and among other functions, is set up to dump the data > from the sensors over serial. > > I'm planning to have the BBB connected to the Mega over serial to collect > the data, store it in a database, and notify me via push messages should > something go out of the ordinary. > > However, I'm concerned about blowing up the BBB, since there are a lot of > caveats about making sure that things are sequenced properly and that no > power is applied to the BBB inputs before it's ready. > > I know that the Arduino outputs 5v signals, and the BBB can only handle > 3v3, so to address that, I've built a logic converter board based off of > some ZVNL120A mosfets, following Phillips' App Note AN97055. > > My big question is - what's the best way to prevent damage to the BBB? > Should I add some extra mosfets inline with the rx and tx lines, and > control the operation of the mosfets from the BBB (so that when the BBB is > off, the serial connection to the Arduino is disconnected)? Or is there > some other way that I should handle this? > > Thanks much! > -- 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.
