Found in Popular Electronics from the 90s, this circuit detects modulated infrared radiation and serves as a test for remote controls. Infrared sensors equivalent to the one indicated can be used.
A small voltage-boosting transformer is used in this pulse generator circuit found in...
This circuit was found in a 1964 magazine, which no longer exists. It is a small wireless...
This circuit was found in a 1980 documentation. The triac used is of the TIC226D type which in the...