Lunchtime Sessions: How to code a simple PWM

​​​Content:

We meet the PWM principle nearly every day: electronic power supplies, electric trains, frequency inverters, heaters, light dimmers … all of these applications make use of the pulse width modulation. The principle pays out on all actuators which can only be switched on or off (i.e. a heater). If the heater is kept switched on all the time, the resulting temperature would probably be too high. But by switching on and off the heater cyclically, it would result in a lower (and correct) temperature.

The average output voltage U_average then results from the on/off switching ratio K_OnOff:

Duration:

14:23 min​

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