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Lightning Detector

Lightning Detector. Michael Bloem Justin Wilson. Goals. Develop knowledge of circuit theory Use Pspice/Cadence to produce a working simulation Build a working breadboard prototype. Project Description.

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Lightning Detector

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  1. Lightning Detector Michael Bloem Justin Wilson

  2. Goals • Develop knowledge of circuit theory • Use Pspice/Cadence to produce a working simulation • Build a working breadboard prototype

  3. Project Description The device will be used to supplement the functionality of my camera (Nikon N70). It will allow me to take pictures of lightning in a variety of lighting situations.

  4. Design Criteria • Circuit must detect variations in light levels not just light • Circuit must amplify the light signal enough to operate the MOSFET with a low resistance (Vgs>>Vt) • Circuit must “hold” signal long enough for the camera to recognize it

  5. Original Circuit Schematic

  6. Modified Circuit Schematic

  7. Phototransistor • Difficult to model in Cadence • Modeled with a pulse voltage supply

  8. Differentiator

  9. Differentiator

  10. Amplifier

  11. Amplifier

  12. MOSFET

  13. MOSFET

  14. MOSFET

  15. Future Work • Test circuit in lightning storm • Make modifications if needed • Build final device

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