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Why is the Schottky diode being used in control circuit?

Humaninsane

imageWhy is the Schottky diode being used in control circuit? and why is the 470nF cap is added at that voltage divider output? how is the Cap value 470nF calculated?

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  • Interesting question... this is what I think.  If the input is an AC signal the Schottky could be used as a halfwave rectifier of sorts to only pass the positive portion of the waveform.  The capacitor then is used to reduce the ripple.  It would be calculated using the formula: c=i/(f.vpp) where vpp represents the desired ripple level.

  • in reply to dang74

     If the input is an AC signal the Schottky could be used as a halfwave rectifier of sorts to only pass the positive portion of the waveform. - application is only DC (max 60V)

    The capacitor then is used to reduce the ripple.  It would be calculated using the formula: c=i/(f.vpp) where vpp represents the desired ripple level. - Vpp=50vpkpk ripple, i = max 5mA (given to ADCpin). what should i consider for F? 

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  • in reply to dang74

     If the input is an AC signal the Schottky could be used as a halfwave rectifier of sorts to only pass the positive portion of the waveform. - application is only DC (max 60V)

    The capacitor then is used to reduce the ripple.  It would be calculated using the formula: c=i/(f.vpp) where vpp represents the desired ripple level. - Vpp=50vpkpk ripple, i = max 5mA (given to ADCpin). what should i consider for F? 

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