DIY Motion Activated Alarm

[John] used some of his spare time to work on a motion-activated alarm that will definitely appeal to those who grew up on a steady diet of Super Mario Bros. – after all, the Mario Bros. theme will play with some flashing lights accompanying it whenever some motion is detected. The attiny13a will be the brain of the project, carefully housed within a Mario mushroom candy tin. If you’re curious of lining up a DIY project for the summer holidays, head on here to check out how [John] did it.