Compact 15piece kit of 5V to 3.3V stepdown power modules built around the AMS1117 regulator. Designed to provide a reliable 3.3V supply from a 5V source, each board delivers up to 800mA and includes automatic start and adjustable limit voltage functionality for safe, repeatable powering of 3.3V devices. Key benefits Converts a 5V supply to a regulated 3.3V output so you can power 3.3V microcontrollers, sensors, and modules from common 5V sources (USB, battery packs, 5V rails). Pack of 15 modules makes it easy to prototype, , or deploy multiple small projects without sourcing individual parts. Integrated AMS1117 regulator and boardlevel controls give a simple, readytouse solution that reduces wiring and setup time compared with building a discrete regulator circuit. Key features and attributes Quantity: 15 pieces. Functionality: 5V to 3.3V stepdown (buck) power supply module. Regulator/model: AMS1117 configured for fixed 3.3V output. Output current: up to 800 mA per module. Start/limit behavior: automatic start and adjustable limit voltage feature included on the board. Form factor: boardmounted regulator module for straightforward wiring and mounting. Compatibility: suitable for 3.3V logic devices and modules that require a stable 3.3V rail. Performance and reliability Regulated 3.3V output to ensure proper operation of 3.3V devices. Up to 800 mA output capacity supports many common modules and peripherals. Automatic start and limit voltage control help protect connected devices during powerup. Typical applications / use cases Powering ESP8266, ESP32 (3.3V models), ARM microcontrollers, small radio modules or sensors from a 5V USB supply during development and testing. Supplying a stable 3.3V rail for breadboard prototypes or multiple small embedded projects where several regulator modules are convenient. Replacing or adding local 3.3V regulation on custom PCBs or DIY electronics projects where a compact, boardmounted AMS1117 solution is preferred. What you get 15 x 5Vto3.3V stepdown power modules with AMS1117 3.3V regulator and automatic adjustable start/limit voltage features. Notes and compatibility tips Designed to accept a 5V input and provide a regulated 3.3V output. Confirm the downstream device current requirements do not exceed the module's 800 mA rating. Use appropriate wiring and heat dissipation practices if running near the module's maximum current. Ideal for prototyping, development, and smallscale deployments where multiple 3.3V regulators are required.