
Schazamp designed a small USB power supply with a resettableĀ PTC fuse, and a ‘fuse blown’ indicator LED. When the fuse is blown a P-MOS gate is pulled low, and it turns on a LED.

Schazamp designed a small USB power supply with a resettableĀ PTC fuse, and a ‘fuse blown’ indicator LED. When the fuse is blown a P-MOS gate is pulled low, and it turns on a LED.