We found this circuit in documentation from the 90s. It is a common configuration that is given in two versions, using transistors and using two integrated inverters.
This circuit can be used in traffic alarm systems. The relay trips when the light falling on the...
In the figure we have the configuration of a voltage regulator with 3 transistors. The components depend...
Here we show a configuration in which we have a control voltage applied from a voltage divider, which...