Analogue Theremin, University of Glasgow
Lindsay Reid and Brendan
Gallery (1 Image)-
For this analogue theremin they
used a transistor oscillator which follows a design originally
developed by Colpitts. There are four oscillators in total, arranged in
two pairs. Each pair forms a beat-frequency oscillator the outputs of
which are modulated by the effect of a player's hand capacitance near
each antenna. This is how the pitch and volume of the instrument are
controlled.
Categories:
 Schematics  Technical
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Glasgow University Theremin Page
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We have constructed two Theremins, one based on
an analog circuit and the other employing digital techniques.
Photographs of our completed instruments are shown above. The visual
appearance of the analog and digital versions contrast sharply, which
was deliberate, in order to reflect the different design approaches
used in the digital device and the more 'traditional' analog instrument.
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