Microbit mini radio controlled car tutorial

The aim of this tutorial is to show you how to create a mini radio controlled car using two Microbits and 2 servos. Using two servos instead of a robot car kit and motor-boards means that you can create a smaller and cheaper radio controlled car!

You will need:

  • 2 Microbits
  • 2 Battery Packs with batteries
  • 1 USB Cable
  • 2 Continuous servos
  • 2 wheels
  • 1 Bulldog clip
  • Glue gun ( or pva/super glue)
  • Soldering iron or 4 Crocodile clips

IMG_20160704_135151[1]

The steps to make the car are as follows:

Step 1

Glue the servos to the base using a glue gun.

 

Step 2

Glue / Blue tack on the Bulldog clip on to the base for the wheel

 

Step 3Microbit mini radio controlled car with servos

Solder / Crocodile clip the wires to the microbit.

 

 

Step 4

Microbit mini radio controlled car with servos wiring

Tidy up the wiring!

 

 

Microbit mini radio controlled car – Sender Code

For this tutorial we can’t use  CodeKingdoms because it doesn’t support Bluetooth radio direct. We need to use this site:

Codethemicrobit.com

Microbit mini radio controlled car with servos sender code

Microbit mini radio controlled car – Receiver Code

Once we have finished coding the sender unit, we need to code the receiver unit to listen for the instructions sent on group(channel) 3. When it receives an instruction it can then output to the relevant pin.

For full details on how servos work, take a look at this page.

Microbit mini radio controlled car with servos receiver code

  • Improve the controls so that the car angle of turn is analogue, not digital
  • Add a speed setting
  • On car stop / start .