The module is a 12-pin display module with a 4-point common digital tube (0.36 inch) with a clock point. The driver chip is TM1637. It only needs 2 signal lines to enable the MCU to control the 4-bit 8- Segment digital tube. The module features are as follows: Display device is 4-digit yang red digital tube Digital tube 8-level grayscale adjustable Control interface level can be 5V or 3.3V 4 M2 screw positioning holes for easy installation
