This digital circuit is from a Radio Electronics magazine from December 1991. It does not use a microcontroller, but rather discrete digital circuits of the time.
September 2016 - Mouser Electronics already has in stock the new TPS63070 Buck-Boost converter...
We found this circuit in an old Italian publication, but it can be fitted with BC558 transistors if the...
This circuit was found in an ancient American documentation. The integrated circuit is of the time...