Useful Link: TM1683.
Features:
TM1638 digital tube driver chip, digital tube for common cathode
2, only need to be connected to the the ICSP interface can drive, do not need to connect to other expansion boards without mcu scan, save mcu resources
3, with 8 of the digital control (including the decimal point), eight-color led eight key input, can be extended to 3 * 8 buttons, digital control and led can be individually controlled
4, supports 8 brightness adjustment, digital tube led with the same brightness
5 with 8 digital tube, eight-color led eight key input, can be extended to 3 * 8 buttons, digital control and led independent control
6, dimensions 10.0 * 5.1 (cm).