2-channel logic level converter bidirectional 3.3 V to 5 V TTL shifter module -5
Near RS232 character end is RS232 level, close to TTL character end TTL level. When MCU and 3.3 V device module is connected, 5 V and 3.3 V TTL level mutual transfer is very convenient. 5 Pieces Logic Level Converter Bi-Directional Module.