Slave flash (CB8700E)

This circuit was found in a Popular Electronics from the 90s. It uses a LASCR which is a photo-SCR not common today.

Front detector (CB9688E)
Found in American documentation from the 90s, this CMOS circuit detects the source of a signal and can...
8 MHz crystal oscillator (CB8049E)
This circuit is from a 1964 Electronic Design. The transistors are from that time. They can be...
Light operated switch (CB8321E)
This circuit was found in 1960s Radio Electronics. The circuit uses components from that time. The...