Found in a 1980s manufacturer documentation, this circuit can be used as an optical shield. The integrated circuit is from the era and modern equivalents can be tried out.
Found in a 1965 Electronic Design, this circuit limits surges in a load when power is applied. The...
This instrumentation circuit was found in the September 1989 issue of Radio Electronics magazine....
In the original publication of the 90s a 556 consisting of a double 555 is suggested. The circuit...