This frequency divider with SUS was found in General Electric's 1967 documentation. Similar configurations can be found elsewhere in this section and on this website.
Found in a 1967 RCA power manual, this circuit uses an ordinary neon lamp to fire a triac. The...
This circuit is from an English publication from 1978, but it can be assembled with BC548 for TR2...
The input frequency of a signal applied to this circuit will be divided by one to 9999 in this...