via instructables
This instructable will show you how to build a Raspberry Pi-based tracker for the shared coffee machine in your office space. Using the tracker’s OLED display and mechanical switches, the users can log their coffee consumption, see their balance and register their payments.
Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!
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