User Guide
1. Parallax P2 Edge Module Socket
The P2 Edge Module socket is a 0.05” (1.27 mm) pitch 80-way vertical socket. Refer to the Edge
Connector Pin Assignment in the P2 Edge Module product guide for full details. It is available
for download from the P2-EC product page at www.parallax.com.
The P2 Edge Module must be inserted with the component side facing the breadboard. There
are silk-screen text markings beside the socket to indicate the positions of P0 and P38.
CAUTION! The P2 Edge Module power input pads have reverse polarity protection,
but damage could occur from user circuits attached to the IO pins incorrectly, so
care should always be taken to ensure correct orientation!
2. Power Jack
The 2.1 mm center-positive DC power barrel jack socket accepts 5 VDC only.
CAUTION! Use a well-regulated power supply and do not exceed 5.5 VDC!
To provide power we recommend the Parallax USB A to DC-Jack cable (#805-00019). This will
allow you to power the P2 Edge Breadboard from a computer USB port or hub.
For higher current applications, connect the same cable to the Parallax 5V 18W USB Power
Adapter (#750-00001).
3. Prop Plug Programming Header
The P2 Edge Module is programmed by the Parallax Prop Plug programming tool (#32201).
There is a dedicated 4-way 0.1” programming and debugging header on this board to simplify
connection of the Prop-Plug Adapter. The pins are marked ▽ △ RES VSS, and correspond to
the pin labelling on the Prop Plug.
Connect the Prop Plug to your computer with a suitable USB cable, and then insert the
Prop-Plug onto the 4way header pins with the Prop-Plug components facing upward. The
upward orientation allows you to see the RX and TX activity LEDs on the Prop Plug while
programming or debugging data is being transmitted.
Refer to Programming Header Pin Assignments for more information.
NOTE: Unplug the Prop Plug If you are using the P2 WX Adapter (#64007) and Parallax ESP8266
WX WiFi Module SIP (#34020S) for wireless programming.
Copyright © Parallax Inc. P2 Edge Module Breadboard (#64020) v1.1 11/30/2020 Page 3 of 11