Battery Powered PCB

Discussion in 'General Electronics Chat' started by Elefont, Mar 19, 2014.

  1. Elefont

    Thread Starter New Member

    Feb 21, 2014
    1
    0
    Hello,
    I'm putting together a small PCB with a PIC MCU and an ethernet port, and I would like this unit to be mobile. Thus, I need to design my power supply to handle a battery pack and then regulate the voltage so it can be used by the microcontroller. I would like to use AA batteries.

    Does anybody have particular tips on using batteries?
    Is it as simple as a bypass capacitor and a voltage regulator (like an LDO), and then I can go straight to the MCU?

    Thanks in advance for any help.
     
  2. ronv

    AAC Fanatic!

    Nov 12, 2008
    3,281
    1,227
    Yes it is that simple. Make sure to use the caps recommended for the regulator.
     
  3. spinnaker

    AAC Fanatic!

    Oct 29, 2009
    4,866
    988
    That depends on the type of battery and the number in series and the voltage requirements of you mcu.
     
  4. JohnInTX

    Moderator

    Jun 26, 2012
    2,338
    1,018
  5. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    7,386
    1,605
    Use 3 AA's in series for 4.5V and toss the LDO.

    DO add a P-MOSFET for reverse voltage protection.
     
Loading...