Every project needs a power supply. As 3.3volt logic replaces 5volt systems, we’re reaching for the LM317 adjustable voltage regulator, rather than the classic 7805. We’ve found four di… ...

Tying the Adjust terminal to the Output terminal forces the internal regulator to compensate, pushing the internal NPN transistor into saturation. The NPN transistor in saturation has a V CE (sat) ...