10
Pulse Width Modulation (PWM)
This chapter concerns pulse width modulation (PWM), which is a digital signal easily generated by a MCU for a variety of purposes. These purposes commonly include controlling the following:
• A standard servo motor’s position
• The rotational speed of a continuous rotation servo
• The luminescence of a light emitter
• The rotation speed of a standard electric motor with external driver circuitry
• A photovoltaic solar battery charger
• The maximum power-point track
• An output waveform such as sine, triangle, or square
• An acoustic sound generator
This chapter’s projects will demonstrate how to control the luminescence (light intensity) of a normal LED, the color and luminescence of a tricolor ...
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