Universal digital display counter circuit

The universal digital display counter is capable of completing various
functions It also has the functions of counting, rechecking, registering, sending numbers, controlled extinguishing, invalid zero extinguishing, BCD code information output, etc. Multifunctional
assembly. It can be used directly or through interfaces with various integrated circuits such as TTL, CMOS, and ECL. For counters used in factories, etc.
, the assembly only needs to be assembled with a universal photoelectric switch
or proximity switch.     The general counter circuit is shown in Figure 15-56. The SX-22-S10 in the picture is a reflective photoelectric switch . It can also be a projection type
or use various proximity switches, or simply use a mechanical switch.