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Homework Help: Piezoelectric energy harvester

  1. Sep 28, 2015 #1
    Yesterday I received a schematic diagram from my lecturer, it about piezoelectric energy harvester. Well, I'm not sure what the function of the transistor BC548. I think the transistors function as amplifier. Am I true? If someone could explain it to me detail, that will be better. Thank you and sorry for my broken english.
  2. jcsd
  3. Sep 30, 2015 #2
    I doubt they are amplifiers if the intent is to harvest energy. I bet the intent is more related to keeping the current flowing in one direction.
  4. Oct 1, 2015 #3


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    The voltmeter is effectively measuring the potential difference over C3.
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