We'll building this mini mac so it can be self contained. We'll need a battery pack for that! The 6600mAh pack is big but will run the setup for about 15 hours (or less if you add wifi and other accessories)

A PowerBoost 500 brings the LiIon pack voltage up to 5V and even has a spot for an on/off switch

Power Circuit for the Raspberry Pi Model B

The circuit diagram above is a illustration reference for powering the Raspberry Pi. A GPIO cable will conneect to the back of the PiTFT display. Wire #2 will need to be soldered to the postive pin on the Powerboost 500C. Wire #6 connects to the negative pin on the Powerboost 500C. The 600mAh lithium ion battery conncets to the JST port on the Powerboost 500C. A slide switch connects to the GND, EN and BAT pins on the Powerboost 500C.


Connect the speakers with the following connections:

connect VDD to VBAT on the powerboost 500
connect GND to VND on the powerboost 500

see photo for audio connections:
connect R+ or L+ to R or L on the raspberry pi (use thin
blue wire)
and connect R- or L- to Gnd on the raspberry pi (ditto)

solder speaker to amp (L out or R out, whichever you
chose in the last step)

set both switches to ON (lowest gain!)

Test Speakers

on on pi, use the following code to test the output of the speakers:

           *|amixer cset numid=3 1

           speaker-test -t sine -f 600
           ||aplay /usr/share/scratch/Media/Sounds/Animal/Bird.wav*
           *aplay /usr/share/sounds/alsa/Front_Center.wav*

This guide was first published on Aug 27, 2014. It was last updated on Aug 27, 2014.

This page (Circuit Diagram) was last updated on Aug 23, 2014.

Text editor powered by tinymce.