USB Protector
Board made with KiCad in order to get used to design (and also to check if I had right footprints, for another project).
1818 PTC fuse to protect device from overcurrent, LM324 and 1206 LEDs to show if host (microUSB port) is trying to communicate with your device - chargers don't need to transfer data, so it'll let you know if there's something fishy.
