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Replying to @josecastillo
posted teh codes. this version also adds a simple interrupt-based UI to set the time. the MODE button unlocks the time setting mode (and lights a green LED); LIGHT at the top left adds minutes; ALARM down by the seconds display resets the seconds to zero. https://github.com/joeycastillo/Sensor-Watch/blob/471bdc60c0d38459702888c722a10f2ed1a8379b/Smol%20Watch%20Project/My%20Project/main.c#L12
(original)