Key benefits 3.3V stable output across a wide input range. The 3.3V boost module maintains stable performance for microcontrollers and digital displays when supply voltage varies from 2.5V to 5.5V, improving reliability in battery powered or variable power applications. Integrated FM radio with global compatibility. The RDA5807M FM module covers 87.5 to 108 MHz, enabling standard FM reception suitable for worldwide use. Strong processing capability. The STC15W408AS microcontroller provides solid processing power for responsive control tasks within the module. Reliable amplification at low voltage. The AXS2031 digital power chip delivers output power while maintaining voltage stability down to 2.5V, enabling clear audio or signal amplification in low voltage conditions. Allinone design reduces board space and integration effort. The combination of voltage regulation, FM reception, control processing, and amplification in a single module simplifies design and wiring for embedded systems. Core components and what they do Voltage stability: 3.3V boost module maintains a steady 3.3V to support microcontrollers and digital displays within the 2.5V to 5.5V input range. FM module: RDA5807M handles FM reception in the 87.5108MHz range, offering broad compatibility with standard FM broadcasts. Main control: STC15W408AS microcontroller provides processing power for device control and user interface tasks. Amplifier: AXS2031 digital power chip provides output power with stable operation when supply voltage is as low as 2.5V. Key specifications (aligned with original specifications) Input supply range: 2.5V to 5.5V Regulated output: 3.3V steady for connected microcontrollers and displays FM frequency range: 87.5 to 108 MHz Main control chip: STC15W408AS Amplifier: AXS2031 digital power chip, enabling output power with low voltage stability to 2.5V Compatibility and design notes 3.3V logic and peripheral compatibility. The module is designed to support standard 3.3V microcontrollers and digital displays. Integrated solution. All essential functions for power regulation, FM reception, control processing, and amplification are contained in a single module to simplify integration. Suitable for compact and battery powered designs. The ability to maintain performance at low input voltages helps when using small batteries or energy harvesting sources. 23 practical use scenarios Scenario 1: Embedded microcontroller project with a display and FM radio. Use this module to provide a stable 3.3V supply, an FM receiver, and processing capability in a compact package, reducing wiring and component count. Scenario 2: Portable handheld device with fluctuating battery voltage. When the battery discharges and the supply dips toward 2.5V, the module maintains performance for the microcontroller, display, and audio amplification. Scenario 3: Educational or development kits for learning embedded systems. The allinone solution demonstrates voltage regulation, FM reception, control processing, and amplification, helping students and hobbyists build and test realworld applications quickly. Notes for integration Ensure your system uses 3.3V logic compatible components to match the module design. Design power management to keep the input voltage within the 2.5V to 5.5V range to maintain stable 3.3V output. Use the FM module within the specified 87.5108 MHz range to guarantee proper reception and compatibility with standard broadcasts.