This circuit is from LinearTechnology Applications of 1997. The circuit uses components of the time used to raise the voltage of a battery from 3 to 6 V.
August 2017 - Heat sinks for use with Arcol / Aluminum resistors can be obtained from Mouser...
Can be used as a shield, this old American documentation circuit offers digitally selected...
This circuit charges a battery to power a flashlight at night. The circuit is from an English...