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.
This circuit was obtained in a 1979 publication. The operational amplifier is of the type with...
The oscillator shown in the figure can generate signals from a few tens of kilohertz up to...
For counting to values higher than 16, many 4520 can be cascaded as shown in Figure . The EN...