74HC138 8 Bit Digital Display Keypad Expansion Board

74HC138 8 Bit Digital Display Board this is 74HC138 8 Bit Digital Display Board.8-digit digital tube & 5-digit independent button expansion board 8-bit dynamic scanning digital tube with 138 decoding Red highlights 11 I/O lines to control 8-digit digital tube Features: Bright digital tube for clear display Adopt 74HC138 as bit drive, save I/O port, and performance is more stable Standard interface for expansion on various development boards Fixed screw holes for easy installation Suitable for various platforms such as 51/AVR/AVR/ARM