“I rescued some old weigh indicator boards from scrap heap! I already had a DS3231 rtc & a HC-05 BT module, so I decided to make use of the rescued boards. I have yet to put them in a posh box - I’m working on that one! I have not yet decided whether to have this battery or mains powered, but if I choose the battery route, I am considering using a proximity or movement sensor to turn on the Led display for a minute or two, and then timeout to save power.”
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