Micro:bit card power supply

The Micro:bit card can be powered in several ways:

1. USB power supply: You can connect the Micro:bit card to a computer or USB power adapter using a USB cable. This will provide power to the Micro:bit card and allow you to program and debug it.
2. Battery power supply: You can use a coin cell battery holder or a 3-volt battery pack to power the Micro:bit card. This allows you to use the Micro:bit card independently of a computer or USB power source.
3. External power supply: You can use an external power supply to provide power to the Micro:bit card. This can be a bench power supply, a solar panel, or any other power source that provides a voltage between 3 and 3.6V.
4. Power bank: You can use a USB power bank to supply power to the Micro:bit card.

As for the second, it has the advantage of being more convenient for powering the micro: bit card since it connects two AAA batteries in series. In addition, its small size makes it ideal for carrying out portable projects.