Arduino, the building block of many off-hours projects, has put the challenge to you, your kids, or anyone you know who just needs the right kit to fall down a rabbit hole, minus a dangerously hot ...

Instead, you simply open the Arduino software (which can be installed on your Windows desktop or accessed online), write your code, and upload it to the board. Then, you're basically set.

The recommended input for most Arduino models when powered via non-USB means is 7 to 12V, with a limit of 20V. It's always a good idea to read the specification sheet, though, just to make sure.