74HC48 ( BCD to 7-Segment Decoder) flex the U/D input should be

the U/D input should be changed only when either CE or CP is HIGH

It can be switched by a much lower voltage and at a much lower current than most mechanical relays

Stall Current: 120mA max

Overvoltage protection

You need to train the module first before recognizing any voice command

74HC48 ( BCD to 7-Segment Decoder) flex the U/D input should beIntroduction : 74HC48 BCD to 7 segment decoder driver IC For Common Cathode (CC) configuration of seven segment. 74HC48 is a BCD to 7 segment latch decoder driver with four address inputs (A, B, C, D), a latch enable input (LE), a ripple blanking input (BI), a lamp test input (LT), and seven segment outputs (a to g). When LE is LOW, the state of the segment outputs (a to g) is determined by the data on A to D. When LE goes HIGH, the last data present