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 circuit was obtained from Popular Electronics of the 1990s. The circuit uses common...
The indicator instrument of this transistor tester, from an Argentine publication of the 1970s,...
Found in 969 documentation, this circuit generates sweep signals from 1 Hz to 100 kHz. The...