A portable speed indicator using an UNO, a NEO6-M and an LCD is powered by a 6000 mAh power bank into the USB port of the UNO. Some tricks are used to make the power bank mot turn off. It runs for 24 hours or more,
A portable speed indicator using an UNO, a NEO6-M and an LCD is powered by a 6000 mAh power bank into the USB port of the UNO. Some tricks are used to make the power bank mot turn off. It runs for 24 hours or more,