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    GEOMETRY OF THEREMIN CAPACITANCE.pdf

    This discusses aspects affecting capacitance "seen" by the pitch antenna which I believe may explain the differences between calculated values derived from the Glasgow Universities paper, and those found in reality. the context of this document can be…
    • GEOMETRY OF THEREMIN CAPACITANCE.pdf
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    Understanding and calibrating 2010.pdf

    This is a work in progress.. First few pages, will be updated ASAP and hopefully completed by end Jan 2010 Basic Theremin Theory, with more detailed examination of antenna (sensor) Equalization, and setting up a LC Theremin for optimum linearity.
    • Understanding and calibrating 2010.pdf
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  • Linearity of different topologies

    I am exploring different linearization methods for theremin front-ends. This is the first in what I hope will be a series, as / if I progress. I also plan to 'publish' the spreadsheets here. First is a 555 based RC oscillator. The operating frequencies…

  • Compensating / "linearizing" an RC oscillator

    It is well known that the worst form of oscillator to use as a theremin VFO is the RC type - The frequency of these oscillators is simply a function of R*C, and as the "antenna" to hand capacitance follows an inverse square law, pitch (from heterodyning…