BuckPuck REF (+5V) as source voltage?

Discussion in 'General Electronics Chat' started by Sarke, Aug 22, 2012.

  1. Sarke

    Thread Starter New Member

    Aug 18, 2012
    I have an Arduino and BuckPuck I am currently building an LED array with.

    As I was messing around with it I noticed that the Arduino and LCD screen powered up without it's own power source. This was because the BuckPuck's REF (+5V) pin was connected to the Arduino's Vcc, as is suggested in the BuckPuck datasheet.


    So with that in mind, do I need a separate power source for the Arduino and related 5V logic circuits, or can the BuckPuck power it from the REF pin? It obviously can, but is it a good idea and can it source enough and be reliable enough as any other voltage regulator?