Data Sheet

Electrical Information
Operating Voltage (Supply via Terminal Blocks or Servo Power Connector) +3.0V – 10.8V (Recommended: 6.0V – 10.8V)
Regulated Voltage Supply (for BBC micro:bit) +3.3V
Servo and Motor Voltage Supply Voltage
Max Current (All Servos and Motors) 10A (Absolute max., 12A)
Servo Output Connections 8 (Provide supply voltage to servos)
Motor Output Connections 4 [2 stepper motors] (1.5A max current draw per motor)
External Connections (Link Header) All BBC micro:bit Pins (IO Pins 5mA max sink/source current)
Power Supply via Link Header to External Devices 3.3V, 90mA max current draw
All-in-one Robotics Board for BBC micro:bit
www.kitronik.co.uk/5641
Changing default I2C address:
The default I2C address for the Robotics Board is set to 0x6C, but by using the adjustment
pads A0 & A1, it is possible to change it to one of 0x6D, 0x6E or 0x6F. The picture to the
right shows pads A0 & A1. Each one is made up of a long pad connected to one of the driver
IC address pins, a small pad connected to 3.3V (marked ‘1’), and a small pad connected to
GND (marked ‘0’). The address is determined by whether the long pads are connected to
3.3V or GND (binary ‘1’ or binary ‘0’). As standard, the long pads for both A0 & A1 are
connected to GND, setting the last two bits of the address to ‘00’. By cutting the small link
track (marked in red), and soldering a connection from the long pad to the ‘1’ pads, the
address is changed. See table on right for address setup.
Address
A1
A0
0x6D 0 1
0x6E 1 0
0x6F 1 1