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  • Build your Own Bat Detector with Analog Parts -- Episode 578

    This video will show you how to build a bat detector. The bat detector works as a heterodyne receiver that can shift frequencies in the ultrasonic range to range the humans can hear. Using an ultrasonic microphone, you can tune the device to the frequency…

  • A Simple Theremin analysed .. EPE 1995 Simulation.zip

    This .zip contains: [ EPE 1995 Full.zip] which is a full simulation of the front-end for http://www.thereminworld.com/EPEArticle.asp and a discussion on http://www.thereminworld.com/forum.asp?cmd=p&T=4575&F=3 about this Theremin. Also contained are: …
    • EPE 1995 Simulation.zip
  • PDF

    DIGITAL HETERODYNING.pdf

    WARNING! - There is a problem with the D-Latch circuit!! Accuracy is not good - the error can be as great as one HF clock period, which can be significant if using low frequency HF clocks or high difference frequencies! I wrote this based on some SIMPLE…

  • 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…

  • Mixed Signal Waveshaping and "Heterodyning"

    Further discussion on these circuits can be found at Theremin World: http://www.thereminworld.com/Forums/T/28556/new-theremin-circuits Attachments: