Data Sheet

The MI:sound board is a speaker board for the BBC micro:bit. A thumb-wheel
potentiometer is used to control the output volume, and a coin cell holder allows
the board to be powered using a CR2032 battery. Power can also be supplied via
the BBC micro:bit USB or JST connections.
Layout & Dimensions:
BBC micro:bit
connector
CR2032 Battery holder
Attaching a BBC micro:bit: To use the
MI:sound speaker board, the BBC
micro:bit should be attached using the
supplied bolts, spacers and nuts as
shown to the right. Only Pin 0, 3V and
GND need to be connected.
Crocodile clips can also be used.
MI:sound Speaker for BBC micro:bit
www.kitronik.co.uk/5649
Power Switch
Speaker
Bolt and Spacer
connections
27.5mm
43.0mm
51.6mm
Volume Control
Potentiometer
M3 Mounting
Holes
Electrical Information:
Voltage Rating +3.3V max
Typical Current Draw (powered
using CR2032 coin cell)
46.6mA (playing music at max volume)
Speaker output at max volume
(powered using CR2032 coin cell)
~60dB at 0.3m
Typical Current Draw (powered via
BBC micro:bit USB)
129mA (playing music at max volume)
Speaker output at max volume
(powered via BBC micro:bit USB)
~75dB at 0.3m
Typical battery life > 8 hours
Software:
The MI:sound board can be driven using both MakeCode and MicroPython.
In MakeCode, any of the ‘Music’ package blocks can be used, and in
MicroPython, both the ‘Music’ and ‘Speech’ libraries can be used.