My project is a toy so it needs to be somewhat light and very portable. I need 6V for a servo and a brushed DC motor. So far all of the 5V Arduino boards need 7 volts or more. This suggests I need 5 AA batteries. So far, the only way I can figure out how to get to 4 AA's is to use a 3v Arduino board.Suggestions?
An Arduino will run off (eg.) 4V connected to the "5V input" pin (ie. bypass the regulator)
NiZn AA batteries
QuoteAn Arduino will run off (eg.) 4V connected to the "5V input" pin (ie. bypass the regulator)I wouldn't recommend this with latest versions of Arduino.The regulator is sensitive to being reverse driven.Add a diode from 5V (anode) to Vin (cathode) to prevent damaging the regulator.
See page 10http://www.onsemi.com/pub_link/Collateral/NCP1117-D.PDFcame to light earlier this year several folks repeated bricked Arduinos from supplying 5V direct to boards.
Can I build a project using 4 AA batteries with a 5V Arduino board?