This 3-digit circuit was found in the 1992 special edition of the Radio Electronics Handbook. The circuit produces a standard voltage for bench testing.
Settings like this can be found in this section and on this website, but from different sources of...
This circuit with TTL output was found in a 1968 EEE. The transistor can be of general use. The...
Found in a 1980s manufacturer documentation, this circuit can be used as an optical shield. The...