4tronix Bit: Bot Robot for BBC micro:bit
- 4tronix BITPEN2, A pen holder accessory Mk 2 for Bit: Bot Classic or Crumble Bot Mk 1. An updated pen holder which is easier to use & more robust than the previous model. Instead of a rubber grommet, the new design has a 2-part construction that the pen simply drops into & uses gravity to give the required down-force. The holder is designed for a Sharpie felt tip pen, but other pens of approx 10 to 11mm diameter can be used. 4tronix Pen Holder Mk 2 for Bit Bot