Found in American documentation from the 90s, this circuit uses TTL technology and is therefore compatible with microcontroller drives. The circuit must be powered by a 5V power source.
The circuit shown is from an old European publication. In it we have the way to activate a relay...
We found this circuit in a European publication from the 1990s. Transistors are still common types...
This circuit was found in an American documentation and can be added to common amplifiers of any...