16 Servo Driver Board for the BBC micro:bit
www.kitronik.co.uk/5612
This servo driver board for the BBC micro:bit allows up to 16 Remote Control
(RC) servos to be driven simultaneously. It is based on the PCA9865 driver IC.
The board includes an integrated Edge Connector for the BBC micro:bit.
Expansion Pads allow the connection of this board with other compatible
micro:bit accessory boards using the “Link” pluggable pin header
(www.kitronik.co.uk/4162)
The board produces a
regulated supply
that is fed into the 80 way connector
to
power the inserted BBC micro:bit,
removing the need to power the BBC
micro:bit directly.
Power (maximum 5.5V) can be supplied to the board via either the dedicated
screw connections, or the 0.1” pitch Power connector, for instance from a
standard receiver battery pack.
Inserting a BBC micro:bit:
To use
the servo driver board the BBC
micro:bit should be inserted firmly
into the connector as shown left.
The board has been designed so
that the BBC micro:bit can be
inserted either way around (facing
forward or backwards).
Note: ‘Link’ functionality is only
enabled when facing the link
interconnect header.
Examples of board in use:
This board can be used to control
multiple servos, such as for a robot
arm.
Layout:
Terminal Block for power (3 - 5.5V)
0.1” pitch
header
connection
for powering
via receiver
battery pack
‘Link’ compatible
expansion header
pads
4 Groups of 4
servo
connections.
These use
standard 0.1”
pitch, with power
on the middle pin,
signal and ground
on the outside
BBC micro:bit
compatible connector
www.kitronik.co.uk/5612
16 Servo Driver Board for the BBC micro:bit
Electrical Information
Operating Voltage (Vcc)
Number of Servo channels
Servo Voltage
Max continuous current (all servos)
3V to 5.5V
16
Same as input Voltage
6A
JavaScript Blocks editor code
Kitronik have developed custom block and JavaScript to support the use
of the 16 Servo Driver board in the micro:bit JavaScript Block editor
(formerly known as PXT). These blocks can be added via the add package
function in the editor from:
https://github.com/KitronikLtd/pxt-kitronik-I2C-16-servo
The example blocks (right) cause Servo 1 to move from 0 to 180 degrees
and Servo 16 to do the opposite as buttons A, A+B and B are pressed.
www.kitronik.co.uk/5612
16 Servo Driver Board for the BBC micro:bit
Dimensions
67.4mm
25mm
This board conforms to the “Link” standard for accessory
boards for the BBC micro:bit.
This allows stacking, and control, of multiple accessory boards
from a single BBC micro:bit.
See
https://www.kitronik.co.uk/LinkStandard
for more
information about this open standard.
62mm
4mm
16mm
4mm
1.6mm
42mm
(Dimensions +/- 0.8mm)
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