Found in an Electronic Design, this small power source uses a battery as a voltage reference, consuming little of its current. The source is shunt type.
The UVTRON tube is an ultraviolet radiation sensor. In this circuit from Radio Electronics from...
The presented circuit provides an output voltage proportional to the input current, according to...
Suggested by a 90s Radio Elecrtronics, this circuit is intended to supply mobile equipment of the time....