FIELD: electronics.
SUBSTANCE: invention relates to devices for sorting granular materials according to optical properties, for example, by colour, and can be used for sorting grain in order to remove impurities and reproducing sound advertisement. Control panel additionally comprises a digital file with sound advertisement, control circuit includes a programmable logic integrated circuit with a frequency generator and frequency dividers, each of which sets frequency of ejector opening in accordance with steps in octave system.
EFFECT: thus, nozzle used in standard design of a colour sorter, controlled by ejectors, can play polyphonic audio advertising messages, for example in form of music, and proposed device can be used as means for advertisement of produced product.
1 cl, 2 dwg
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