Quote:
Originally Posted by IanW
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Quote:
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Digital Signal: A digital signal has only two states: on or off. Robot components that communicate with a digital signal generally do so by varying the frequency at which they alternate between on and off.
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A digital signal has a discrete number of states. A 1-bit digital signal has 2 states. An 8-bit digital signal (whether parallel or serial) has 256 states.
A frequency-modulated signal is an analog signal (unless the modulation is intentionally limited to a discrete set of valid frequencies).
Likewise, a pulse-width-modulated signal is an analog signal (unless the pulse width is intentionally limited to a discrete set of valid pulse widths).