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In part two of the tachometer/speedometer project, we'll add a keypad and LCD for easier user interaction.

Build an LED chaser with a little twist: we'll be using a microcontroller and an LCD along with the usual 4017 counters.

Resolution and sampling rate are two important factors to consider when selecting an analog-to-digital converter (ADC). In order to understand these fully, concepts such as quantisation, and the Nyquist Criterion must be understood to a certain degree.