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.
November 2016 - NXP ARM Cortex microcontrollers for serial interfacing applications, NXP 32-bit...
This circuit was found in a Popular Electronics from the 90's. The power transistors must be...
The integrated circuit used in this project is uncommon and so are the transistors, but they can...