Debouncer (CB20546E)

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

Telephone Call Indicator (CB17398E)
This circuit, found in 2002 documentation, triggers LEDs when a phone call is received. The LEDs...
XR2206 Function Generator (CB24506E)
This simple version of a function generator with the XR2206 was found in the May 1977 issue of...
Powerful FM Transmitter (CB4330E)
This circuit is from 1989 documentation. It uses the TDA2002 as a modulator and the unusual power...