This circuit can be used as an answering password system in a store, office, or other location. The circuit is from Intersil using components of the time. The circuit is from the 80's.
This circuit originally appeared in a publication of 1997. With the changes, the circuit can be...
We found this circuit in an English documentation from 1995. The components used are common...
This circuit cut the noise peaks by means of diodes so that they do not appear in the output...