AMS1117-3.3 LDO Step-Down Power Supply Module

Many popular sensor chips and radio modules run on 3.3V while the rest of a project's supply is 5V, and this little board solves that mismatch with an AMS1117-3.3 linear regulator that quietly drops the extra voltage away as heat rather than needing any switching circuitry or inductors. Because it is a linear design rather than a switching one, its output stays free of the electrical switching noise that can interfere with sensitive analog sensors or radio receivers, at the cost of being somewhat less power-efficient on larger current draws. Rated for up to roughly 800mA, it comfortably covers powering a single Wi-Fi or Bluetooth module, an RFID reader, or a handful of 3.3V sensors, making it a cheap, reliable fix for voltage-mismatch wiring problems on almost any breadboard build.