The AMS1117 is a linear regulator. Power dissipation is calculated as (VIN - 3.3) * I_LOAD. For example, at 12V input and 200mA load, the regulator dissipates (8.7V * 0.2A) = 1.74W, which will make it hot. A heatsink or reduced load is required above 500mA.
The module features two sets of interfaces: a DB9 female connector for RS232 and a 4-pin header for TTL connection. Магазин "Бесплатная доставка" Pin (TTL Side) Description Power Input Connect to 3V–5V DC. Common ground with the microcontroller. Receive Data Receives TTL data from the microcontroller. Transmit Data Transmits TTL data to the microcontroller. 3. Application Guide hw-044 datasheet
The is a widely used, compact converter module designed to bridge the gap between RS232 serial communication (standard on many industrial devices and older PCs) and TTL-level serial communication (used by microcontrollers like Arduino, ESP32, and Raspberry Pi). The AMS1117 is a linear regulator
Based on the reliable transceiver chip, this module facilitates seamless, high-speed data transmission by converting RS232 voltage levels ( ±plus or minus ±plus or minus A heatsink or reduced load is required above 500mA