Pololu Wixel - Manual (Page 23)

5. Connecting Your Wixels
This chapter explains some of the electrical connections you might need to make to get your Wixel working the way
you want it to.
5.a. Connecting Power
The two main ways of powering the Wixel are the USB port and the VIN pin. The schematic of the Wixel’s power
system is shown below:
Wixel power system schematic diagram.
VIN Power Input
The Wixel can be powered from VIN if you connect a 2.7–6.5 V power supply (e.g. battery or regulator) to the GND
and VIN pins. The negative terminal should be connected to GND. The positive terminal should be connected to VIN.
It is okay to have both USB and VIN connected at the same time.
The Wixel can be powered from an
external power source connected to VIN.
USB Power Input
The Wixel can be powered from USB if you connect a USB cable and leave VIN disconnected. The Wixel will draw
its power from USB if VIN is disconnected or it is below about 4 V.
Pololu Wixel User's Guide © 2001–2014 Pololu Corporation
5. Connecting Your Wixels Page 23 of 64