Figure 1. Many industrial applications and small machines with a motor and limited I/O requirements can benefit from using AC VFDs with an integrated PLC. We have witnessed the trickle-down effect of ...
Reddit user [InThePartsBin] found some VFDs (Vacuum Fluorescent Displays) on an old PCB on eBay. The Russian boards date from 1987 and have a bunch of through-hole resistors, transistors and a ...