Arduino 6 Scanning Digital Voltmeters

If like me many of you have this LED&KEY module board lying around for some time? With an Arduino, it makes an interesting scanning Digital Voltmeter - in fact, 6 of them :) I consider this to be a project start, and (perhaps with your help), I'm looking forward to developing it further. The Arduino sketch I've constructed sofar has a link listed below, and if you like my work – please consider Liking, Sharing and Subscribing, thank you. **Please help me purchase more components for more projects/repairs. To make a donation: https://paypal.me/ThankyoufromBeamer?locale.x=en_GB Links: Arduino Sketch: https://u.pcloud.link/publink/show?code=XZIUEqkZuS8BxWLriRBzejx7qQHsnmhfCt8V About Bed-Of-Nails test rig: https://en.wikipedia.org/wiki/In-circuit_test#Bed_of_nails_tester TM1638 specifications: Datasheet: https://retrocip.cz/files/tm1638.pdf I didn't buy mine from here, but I thought I would include a possible LED&KEY board source: https://www.ebay.co.uk/itm/TM1638-8-Bit-Digital-LED-Tube-Key-Display-Module-Board-9500RPM-Rated-Spee-TED/264064843490?var=563606903985 ... https://www.youtube.com/watch?v=p6YezOYxoJE