4tronix robobit for bbc microbit and accessories 4tronix robobit the robobit robotics controller 75 0133 is a ready assembled robotics controller board thats ready to be used with your bbc microbit just add battery power 3 or 4 aa is ideal but not included and motors of your choice to make your own diy robot use a small box ice cream carton or similar to house everything and you can build a really affordable robot for your school coding club or home robobit has been cleverly