USB Charger Doctor - In-line Voltage and Current Meter Microbit then there is the option

then there is the option to feed this straight to the relay or a timer of up to 25 minutes can be used

Normally one would just turn those kinds of motors on and off

Both available separately

With micro:bit we have written a special MakeCode package that "knows" about the shape of all the cubes and can map from x

USB Charger Doctor - In-line Voltage and Current Meter Microbit then there is the optionHelp! This patient is heating up! Is the voltage too low? Is the current draw too high? Is there a doctor in the house? Oh, thank goodness, the Charger Doctor is here! Right on time Doctor, can you tell us what the current draw is? What about the voltage? Thanks to the Doctor, you will now be able to watch and care for your USB powered projects. Use the USB Charger Doctor to measure the working voltage and current output for any USB port and project.