Found in European documentation from the 1980s, this circuit was originally designed for computer applications of the time. However, the basic idea can be adapted for use with microcontrollers.
We found this configuration in a 70s American documentation. The circuit makes use of operational...
The circuit shown is powered by 5 V and was suggested by Motorola's Linear Databook of 1990....
This simple transistorized intercom circuit was found in a 2000 documentation. It can be powered by a...