Found in an old Elektor, this circuit uses two 7-segment displays to indicate the volume of an amplifier. The circuit uses components that are still common today.
In the figure we have the simple way to implement a voltage reference with an operational one. The...
Found in a Popular Electronics from 1992, this circuit has two output voltages given by the...
This circuit allows the testing of integrated circuits of type 741 (operational amplifier) such as...