Arduino PWM to voltage with Lowpass

166

02:00:16

The OpAmp integrates the PWM signal to a control voltage. Generator on the left simulates the PWM output pin of the Arduino. Try to change the pulse width of the generator in order to dim the lamp.

published 9 years ago

flowDAQ

9 years ago

Perhaps I am missing something, but that NMOS is going to get hot, so why not have it PWM the light and ditch the low pass filter.

nachbelichtet

9 years ago

The light is only a placeholder for a load. This is to control a PSU without ripple.

hurz

9 years ago

The basic idea of PWM is to drive the load digital and to keep the driver cool as @flowDAQ already said. Anyway, if you need a prefect decimation filter then check this one http://everycircuit.com/circuit/6000713779904512

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