University of Illinois Urbana-Champaign

Beyond voltage dividers: resistive sensor implementation for tactile control of musical instruments and other systems

Takikawa, Danny

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https://hdl.handle.net/2142/120466

Description

Title
Beyond voltage dividers: resistive sensor implementation for tactile control of musical instruments and other systems
Author(s)
Takikawa, Danny
Issue Date
2023-05-05
Director of Research (if dissertation) or Advisor (if thesis)
Cheng, Zuofu
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
  • resistive sensors
  • force sensing
  • touch sensing
  • MIDI
  • FSR
Abstract
Commercially available resistive sensors such as force sensitive resistors and linear touch potentiometers can be integrated into microcontroller circuits with the use of simple voltage divider circuits. This allows physical user interfaces to offer continuous tactile control in the form of pressing onto the sensor with a finger or other actuator without increasing the complexity of the underlying circuit. In the case of the force sensitive resistor, this implementation is not ideal because of the nonlinear relationship between force and output voltage. In the case of the linear touch potentiometer, this implementation works for single-point position sensing, but does not allow for multiple sensing points. This thesis will compare several different circuit implementations for these sensors to show the benefits and drawbacks of each and describe a method that allows certain linear touch potentiometers to detect two points simultaneously instead of just one. The use of these improved sensor circuits in electronic musical instrument control will be discussed as an important application.
Graduation Semester
2023-05
Type of Resource
Thesis
Copyright and License Information
Copyright 2023 Daniel Takikawa

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