This happy state of never encountering anything but 5V logic as a hobbyist has not persisted. In recent decades the demands of higher speed and lower power ... the circuits we use when ...

There will also be a standby 5V supply using another small transformer, and a “power good” circuit to tell the motherboard that the PSU is ready and to activate the supply on an external input.

The library's GPI is a highly configurable general-purpose input cell which features three selectable input modes, three selectable resistive termination options, and a wide supply range. The ...

A system that converts AC current from the wall outlet into the DC currents required by electronic circuits. A computer power supply converts ... while 3.3v and 5v are used by the chips and ...