Description
We built a platform for therapeutic musical instruments for people with special needs. The system is a stand-alone biofeedback system that measures grip force, used as input, and produces sound, as output.
The system includes display and control switches for browsing various programs. The output sound is correlated with the input, according to different predefined algorithms. Based on two chips and grip force sensors, the core of the system is a "TI MSP430" microcontroller. The system produces general midi sounds using a standard sound generator chip.
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Design Considerations
- Noise: The audio should be free of noise; this requires special attention to board and power supply designs.
- Memory size: The system memory is limited to 8Kb flash memory. Special care was given to optimizing the code. Real time sampling: input sampling should occur at fixed times regardless of any parallel microcontroller activity.
- Product lifetime: The components used must have a minimum lifetime of 5 years and, preferably, last 10 years.
The design was executed for AnalogTone.
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