In the figure we have the way to use the transistors of an old-paired pair as a trigger circuit. The circuit is by Philips from an old documentation.
This circuit was found in an old publication from 1989 but can still be assembled today with BD135...
We found this circuit in a 1987 documentation. Its purpose is to turn on a garage light using the...
In the figure we have a simple logic level indicator for TTL circuits or powered by 5 V....