The output pulses of an encoding circuit can be counted with a BCD up/down counter such as the 40192. A binary-coded-decimal (BCD) number is produced. The counters have separate "up" and "down" clock inputs. For example, as long as the COUNT input (pin 11) is high, the counter will increment one count for every positive edge at the CLOCK-UP input (pin 5), and decrement one count for every positive edge at the CLOCK-DOWN input (pin 4). Counters can be cascaded by connecting the BORROW output (pin 13) to the following CLOCK-DOWN input and the CARRY output (pin 12) to the following CLOCK-UP input.
Required Field 
