Debouncer (CB20546E)

This anti-ringing circuit was found in an English documentation from 1996. The integrated circuit is the 74LS14.

General Purpose JFET Preamplifier (CB25568E)
Any JFET can be used in this circuit suggested by Electronics Now magazine, April 1993. The...
Dual Trace Converter (CB25851E)
This circuit allows you to view two low frequency signals on a single channel oscilloscope. It was...
Alarm with the 555 (CB6777E)
Found in an old Popular Electronics this circuit is still current. The SCR can be of the 106...