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Topic: Power an arduino (Read 1 time) previous topic - next topic

xl97

#5
Jan 25, 2013, 02:51 am Last Edit: Jan 25, 2013, 04:00 pm by xl97 Reason: 1
Yikes!..

I typed that backwards!  (sorry) (corrected)

no more than +5v to the "+5v pin(s)"..  which bypasses the voltage regulator..  


CrossRoads

Er...
Yes; put +5V on the 5V header pin, and a diode from 5V (cathode) to Vin (anode).
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

xl97

#7
Jan 25, 2013, 03:49 am Last Edit: Jan 25, 2013, 03:57 pm by xl97 Reason: 1
I thought I read it was not a good idea to power from the +5v pins like that?  something about backwards powering the voltage regulator or something?  (Im trying to recall where I just read that.. some thread here perhaps?)   this true?

thanks..

CrossRoads

You did - back in reply #1.
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

xl97

#9
Jan 25, 2013, 03:54 pm Last Edit: Jan 25, 2013, 03:59 pm by xl97 Reason: 1
doh~!.  :smiley-eek:   :smiley-red:   (thats what I get for having tons of tabs open and reading a bunch of threads here at the same time)

sorry.  lol

so its true then?  you should not?  (isnt that how many 'FTDI' breakouts work? powering the board in just such a way?)

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