Found in an old Popular Electronics this circuit appears in other variations on this site and in this section. It uses a 7-segment common anode LED display as an indicator.
The purpose of this circuit is to send signals on low impedance lines with a maximum voltage of 70...
This circuit, from a 1977 publication, allows to know if a bipolar transistor of general use is...
We found this circuit in an old English documentation from the 70s. The transistor can be a modern...