This optical sensor circuit for a robot was found in the March 1986 issue of Radio Electronics magazine. It controls two motors according to signals from optical sensors or couplers.
This circuit for cars of the time was found in a Popular Electronics magazine from the 90s. The...
IDT ZSSC3230 Capacitive Sensor Signal Conditioner Available from Mouser Electronics stock, this IDT...
According to the article in Radio Electronics from April 1986, it would be possible to detect...