PiSwitch Wiring Diagrams (PDF)
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Author: Kevin
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PiSwitch Wiring Diagrams (not to scale)
April, 2018 – K. Bell
Raspberry Pi 3 Model B v1.2 – Solder pads
PP26 – Left Audio
PP25 – Right Audio
PP24 – Composite Video (Don’t use)
PP5 – GROUND
2 3 1 4 5
Adafruit Headphone Jack
https://www.adafruit.com/product/1699
Pins 3 and 4 disconnect when headphones are plugged in.
Pin 2 – Right Audio in from Raspberry Pi
Pin 3 – Right Audio out to PAM8302 audio amp
Pin 1 – GROUND (middle pin)
Pin 4 – Left Audio out to PAM8302 audio amp
Pin 5 – Right Audio in from Raspberry pi
NOTE: The PAM8302 is a mono audio amp only. It can only accept either Pin 3 or Pin 4 as input. I
choose the left channel Pin 4. Audio from the headphones will be in stereo, however.
PAM8302 Audio Amp
https://www.adafruit.com/product/2130
This little board is needed to boost the audio to the speaker. This board is a MONO audio board – it
only outputs to one speaker
A+ Audio in from either the headphone jack (or Raspberry Pi directly if not including a headphone jack)
A‐ GROUND
Vin – 5v power from PowerBoost
GRN – ground from PowerBoost
PowerBoost 1000C
https://www.adafruit.com/product/2465
This board distributes power from the battery to the other components (Raspberry Pi 3, PAM8302 audio
amp, 7” Raspberry Pi Official Touchscreen)
The PowerBoost 1000C has three sets of 5V Power and Ground (in Red and Black) that can go to the
three components:
The Power Switch is soldered to the EN and GND points
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