While developing the TL497A DC-DC converter circuit i had in mind the possibility of replacing its functions with a PIC Micro-Controller.
After successfully developing the TL497A circuit exactly the same calculations for the component values and design parameters were used to develop a control program for the micro-controller. The micro-controller samples the output voltage and based on the value drives the output stage as required to maintain the 12V output. This project allows a 3.5V-5.5V battery pack to generate a 12V output. The PIC micro-controller can be programmed to generate a system capable of supplying different current outputs. Click here to find out more about this project.