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.
In the figure we have the way to connect an LED on the output of a power source to indicate the...
The UM3562 integrated circuit is a dedicated circuit found in many toys because it generates three types...
This amplifier for public address was found in English documentation from 1967. The transistors are from...