Found in the 1969 neon lamp documentation, using neon lamps this circuit provides 18 V regulated with 0 to 4 mA current. The lamps are types of the time.
This game aims to make you discover which is the combination of activated switches that make the...
The LM109, which is not common today, was manufactured by many semiconductor companies. This...
This adapter circuit for measuring voltages was found in Radio Electronics from April 1966. The...