What This Document Is
This is a laboratory manual detailing an experiment focused on DC motor control and speed measurement using microcontroller technology. Specifically, it guides students through the process of building and testing a tachometer – a device for measuring rotational speed – applied to a DC electric motor. The lab builds upon prior coursework in microcontroller programming and circuit analysis, requiring practical application of theoretical concepts. It’s designed for a mechanical engineering course exploring the intersection of microcontrollers and electromechanical systems.
Why This Document Matters
This resource is essential for students enrolled in a microcontroller-focused mechanical engineering curriculum. It’s particularly valuable during the lab portion of the course, providing a structured approach to hands-on experimentation. Students will benefit from this material when they need to understand how to interface a microcontroller with real-world sensors and actuators, specifically those used in motor control applications. It’s ideal for use *during* a lab session and as a reference for post-lab analysis and report writing. Understanding these principles is foundational for many mechanical engineering roles involving automated systems.
Common Limitations or Challenges
This lab manual provides a framework for experimentation, but it does *not* include pre-written code or step-by-step instructions for every connection. Students are expected to have a working knowledge of assembly language programming and microcontroller architecture, developed through prior assignments. It also assumes access to specific hardware components – a DC motor, potentiometer, emitter-detector sensor, and 7-segment LED display – and a microcontroller development environment. The document focuses on the *application* of concepts, not the fundamental theory behind them.
What This Document Provides
* A clear objective outlining the learning goals of the experiment.
* A detailed description of the experimental setup, including the components involved and their interconnections.
* A pre-test procedure to verify the correct functionality of the hardware before beginning the main experiment.
* Guidance on characterizing the relationship between DC motor voltage and speed.
* References to associated homework assignments that provide the foundational code for the lab.
* Diagrams illustrating the wiring and circuit configurations.
* A structured approach to data collection and analysis.
