3. The Zumo Shield in detail
3.a. Features and components
The main features of the Zumo Shield are labeled in this diagram:
Power
The Zumo chassis has an internal compartment for four AA batteries. We recommend using rechargeable
[http://www.pololu.com/catalog/product/1003]
, which results in a nominal voltage of 4.8 V (1.2 V per cell).
You can also use alkaline cells, which would nominally give you 6V.
A direct connection to the battery terminals is provided by the battery charger connector on the rear edge of
the shield, which can be used to recharge the Zumo’s batteries without removing them from the chassis. The
positive pin of the charge connector, on the left, is indicated by a plus sign (+). A charger like the
[http://www.pololu.com/catalog/product/2260]
, connected by clipping its alligator clips to a pair of jumper wires inserted
into the charge connector, works well for charging the Zumo.
After passing through reverse protection, the battery voltage is connected to the rest of the shield by the power
switch. The switched battery voltage is designated VBAT and provides power to the motors through the DRV8835
motor driver. An on-board boost regulator, also supplied from VBAT, generates 7.45 V to power the Arduino
through its Vin pin. In turn, the Arduino’s regulated 5V and 3.3V voltages supply power to the motor driver logic,
buzzer circuit, and compass module on the Zumo Shield.
Pololu Zumo Shield for Arduino User's Guide
© 2001–2012 Pololu Corporation
3. The Zumo Shield in detail
Page 16 of 28
