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Air Horn Organ Control with Raspberry Pi #piday #raspberrypi @Raspberry_Pi

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Great project in progress and write up from semininja on GitHub:

a python script for interpreting MIDI files for output from a Raspberry Pi to the solenoid controllers for an air-horn organ

the master branch uses relative time in the scroll, and therefore times output using time since last update

The 8 control boards are each comprised of one SN74HC595N and one ULN2803APG, and each board can output to 8 solenoids. The current iteration is scripted with a built-in range of 64 chromatic notes starting at MIDI pitch 24. The PCB design can be found here. This project requires py-spidev and python-midi.

The project blog can be found here.

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