Mechanical Plectrums

This is our Plectrum module, featuring a servo per string allowing to pluck each string independently either from their dedicated push-buttons, incoming triggers or via MIDI.
In Pluck mode the servo will move about 20 degrees efectivelly plucking the string.
In Harmonic Mode the servo only moves about 10 degrees stopping at vertical position to lightly tap the string so that harmonics can be heard. For this to happen the user needs to place the module in specific locations, for ex. at half the string length, at 2/3 the string length or 3/4 of the string length.

For effective use up to 3 modules can be daisy chained, one plucking the strings and 2 others to engage different harmonics.

To change between modes 4 switches features 3 states:
UP: disables triggers and MIDI inputs while still allowing push buttons to trigger the PLECTRUM.
MIDDLE: Pluck mode, all inputs are active.
DOWN: Harmonic mode, all inputs are active.

Plectrum Height Calibration
The user can ajdjust the height of the plectrums with the screws.
For Pluck mode they need to be quite low, for Harmonic mode they need to be raised about 4mm.

12 extra spare plectrums are provided.
(.stl 3D printing files available per request)

The current consumption of this module is somewhat different for standard modules, the idle consumption is about 120mA on the +12V, when a servo moves the current can go momentarily up by 200mA, if all servos move at the same time there will be a momentary peak of about 920mA.

Part of the ADDAC 120 Series.

https://www.addacsystem.com/en/products/modules/addac120-series/addac124