This unijunction transistor circuit is a frequency divider synchronized to 100 kHz. The circuit was found in a Radio Electronics from July 1968. The adjustment of R4 is important.
A binary counter until 2" or a divide-by-the same value can be built by cascading n 4013...
We can control the frequency of an oscillator from digital circuits or from the output of a...
Found on Popular Electronics this circuit has variations found throughout this site and section....