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The Motif I wanted to use a compact device to measure and display the speed of some orbiting wheels. I quickly created a simple but compact digital tachometer using an Arduino Uno microcontroller and ...
I used an LCD shield to display the current temperature and speed of the fan, but you can use the circuit without the LCD display. You also need to select the transistor by the type of fan that you ...
Meanwhile, pre-provided shield templates allow your smartphone’s display to emulate a switch, slider, keypad, or LCD display without you actually having to wire anything up.