ams1117
2 pages across tutorials, modules, pinouts and guides.
beginnerModule
Breadboard Power Adapters: Standard 5 V / 3.3 V, Step-Down and Booster
Three USB-C breadboard power adapters that plug into both pairs of rails at one end: a standard board with a 5 V / 3.3 V switch per side, a step-down that sets 1.25 to about 3.5 V, and a booster that sets about 4.3 up to 28 V. Which way round they go, why 5 V reads 4.7, and the half-amp fuse that limits all three.
beginnerModule
AMS1117 LDO Regulator Modules: 3.3 V and Adjustable
Eighteen fixed 3.3 V boards and six adjustable ones that turn a higher supply into a steady lower voltage. What to feed them, which pin is which, how much current before heat stops them, and how to set the adjustable board.