CRESCENDO BOARD :

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This board has 10 HALL sensors, and can be placed around the axis of a simple wood pedal. No need for petentiometer. Outputs 10 values corresponding to the accurrate position avec the pedal.
A simple sowftare function converts the position sent by the outputs to ControlChange or ProgramChange MIDI orders.
With 0-127 values.
A simple DB15 connector is used for the outputs.
Needs 5 volts input via the connector.