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4) VOUT Breadboard Headers
The PowerPal has two blocks of 4-pin headers posi oned to allow inser on directly into the
breadboard power rail. The top pins are all posi ve voltage, and the bo om row of pins (nearest
the board edge) are nega ve GND. The GND pins are iden fied by a white square around the
pads, both on the top and the bo om of the pcb.
CAUTION! Before connecting power to the PowerPal, ensure that it is oriented
in the breadboard, such that the positive and negative outputs match the
circuit.
differentiate VOUT and GND.
5) VOUT Access Header Pads
Located between the breadboard headers are a set of 3-pin through-hole pads that allow users
to fit a custom VOUT connector. The pads are spaced at a 0.1" pitch.
The center pin is posi ve, and the two outer pins nega ve/GND. The GND pins are iden fied on
both sides of the PCB by the white silk square around the pad.
6) VIN DC Jack
The DC Jack accepts a 2.1mm center-posi ve barrel plug. It is compa ble with many different
power source op ons, including wall-mount power supplies and ba ery packs sold by Parallax
Inc.
The jack socket is connected directly to the VIN Header pins, located behind the DC Jack. The
dual connec on op on allows you to supply power through one, and source power from the
other. This might be useful to power high-voltage servo motors at ba ery supply voltage, while
PowerPal VOUT could be set to provide a lower voltage to your microcontroller and the rest of
your project's circuits.
If your project required two PowerPals, you can power them both from one DC-Jack by linking
the VIN headers together with a short 3-pin jumper cable (751-00010).
WARNING! DO NOT connect a power input source to both the DC Jack and VIN
headers at the same time!
Copyright © Parallax Inc.
Use color-coded wires and, if available, breadboard markings, to
PowerPal Module (#32133)
V1.0 11/20/2018 Page 4 of 6
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