Delta-Q hack LED display

Working on a project that I’ve been putting off. Had the parts for a year and have been sidetracked.

Digital voltage display that can be set to HVC. The charger I’m testing on can be set from about 70 volts to 99 volts. Easy to go up to 120v but display only goes to 99.9.
I have no need for over 99 volts in any case.