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  1. Sachin Anchan

    Digital Radio Mondiale Receiver

    I am planning to build a low-cost DRM only receiver($50). In this regard, looking for help to building a low-cost SDR which could provide IQ data and tune frequency range from 500kHz to 1.7MHz.
  2. Sachin Anchan

    Power Spring Design?

    moon161: Thanks a ton! I owe you one. This is the perfect answer.
  3. Sachin Anchan

    Power Spring Design?

    GregLocock: Thank you! My initial design needed 100kJ. For the current design looking for 1Nm torque at 1rpm for 3 hours. Please let me know if you can help me on spring design. Regards
  4. Sachin Anchan

    Power Spring Design?

    LittleInch: Thanks a lot for quick reply, rpm=1.
  5. Sachin Anchan

    Power Spring Design?

    3DDave: The energy stored in the spring needs to be equal to provide 1Nm of torque for 3 hours while unwinding.
  6. Sachin Anchan

    Power Spring Design?

    I agree the energy stored in the too high. Jboggs: Thanks for the list, I'll contact them. byrdj: Thanks for the link, I am looking for detailed flat spiral power spring design, please suggest me formulas/books/software that I can refer while designing. drawoh: Is there a paper/formulas...
  7. Sachin Anchan

    Power Spring Design?

    I am working on a spiral spring powered dynamo system. Where a dynamo is driven by spiral spring through gears. I am new to the spring design and need help in designing. Does anyone know how to design a spring that could store 100 kilo Joule of energy? The energy stored in the spring will then...

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