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Controlling 3 Servos With The Servo:Lite board

By default the Servo:Lite board for the :MOVE mini buggy kit is capable of driving its 5 ZIP LEDs in conjunction with two servos. In this resource for the Servo:Lite board we are going to cover how you can ‘hack’ the board to facilitate the driving of three servos.


It’s important to note that we included this as a feature and as such we ensured that not only is the ‘hack’ very easy to do, it is also easy to reverse. Also, the ‘hack’ disables the onboard ZIP LEDs, reversing the ‘hack’ re-enables the ZIP LEDs again.

Both the ZIP LEDs and the servos are controlled from outputs on the microbit. The Servo:Lite board only breaks out P0, P1 and P2 to drive things. So, if we want three servos we need to disable the ZIP LEDs.


As you can see in the above image, the ‘hack’ is a simple three step process;

1. Create a soldered joint across the two pads on the front of the board.
2. Break the track between the two pads on the rear of the board.
3. Add 3 x 0.1” header pins to the board for the extra servo to connect to.

To return a ‘hacked’ board back to its original state just reverse the process;

    • Remove the soldered joint on the front of the board.
    • Create a soldered joint across the two pads on the rear of the board.


Servo:Lite And microbit Pin Assignments:

The table below highlights the pin assignments that you will need to be aware of when writing your code.

microbit. Servo:Lite.
Pin 0. ZIP LEDS or Servo 3.
Pin 1. Servo 1.
Pin 2. Servo 2.


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4 thoughts on “Controlling 3 Servos With The Servo:Lite board”

  • Habong Lee December 2, 2017 at 3:10 am

    Hi What is the PIN number for Servo 3?

    • Mark Donnison December 7, 2017 at 1:17 pm

      Hi, Pin0.

  • Dan March 2, 2018 at 12:09 pm


    When it says "Break the track" between the two pads, what is it actually referring to? The black separating line between the pads?



    • Mark Donnison March 5, 2018 at 3:29 pm

      Hi Dan, The track is under the black silkscreen (top layer) on the PCB. If you tip it under a light you should just be able to see it. Give it a good scratch (gouge) to separate the two pads, we typically use a screwdriver or craft knife for this.

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