The integrated circuit used in this trigger is uncommon today. We found it in a documentation from the 70s. The circuit operates with signals up to 50 kHz.
This transistorized receiver was found in Popular Electronics from February 1968. Transistors are...
This sound effect circuit was found in a 1987 publication. It is a circuit that drives a set of...
The circuit shown is from 1997 Linear Technology Applications. The components used were common at the...