AMS1117-3.3 LDO Voltage Regulator Module

Plenty of sensors and modules run on 3.3V while the rest of a project's rail sits at 5V, and this board is the simple fix: an AMS1117-3.3 linear regulator on a breadboard-friendly 3-pin board that drops a 4.5V to 15V input down to a clean, regulated 3.3V output at up to 800mA. Being a linear regulator rather than a switching converter means no switching noise on the output - important for powering sensitive analog sensors that a switching supply's ripple could affect.

That simplicity is the whole trade-off: linear regulation wastes the voltage difference as heat rather than converting it efficiently the way a buck converter would, so it suits low-current 3.3V loads rather than anything drawing meaningful current across a large voltage drop.

Common uses are powering a single 3.3V sensor or module from a 5V Arduino rail, prototyping circuits needing clean 3.3V without switching noise, and any low-current 3.3V load where efficiency matters less than simplicity and noise-free output.