- I want to create a device that reminds me when my coffee bean is running low.
- I will place a FSR at the bottom of a box where I keep my bag of coffee bean. I will set a threshold on the FSR analog read. If it is lower than certain value, a LED light will switch on. If it is above the threshold, then the LED light will be kept off.
- I use 50 grams of coffee bean every time either with a Syphon coffee maker or cold brew bottle. So the threshold should be 50 grams which will at least last me one more day.
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