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Week 11: Input Devices

Week 11 assignment is to probe an input device’s analog levels and digital signals.Nihal had made an hall effect sensor breakout board using 811 of MT811x family sensors.It is documented in his week 11 page

811 breakout board nihal have done

This is the desired out we wish to get as output

Setup and Equipment Used

  • Hall Effect Sensor Breakout Board: Assembled by Nihal using MT811x sensors.
  • Power Supply: Utilized to provide a stable 5V power source to the sensor.
  • Bench Power Supply: Enabled the provision of consistent power to the sensor for testing purposes.
  • Tektronix 5 Series Mixed Signal Oscilloscope: Employed to visualize the output signals and analog levels.
  • Neodymium Magnets: Utilized to induce changes in the sensor’s output.

Testing the Sensor

  1. Power Supply Connection:

  2. The bench power supply was connected to provide a stable 5V power source to the sensor. Power Supply Connection

  3. Oscilloscope Setup:

  4. Utilized the Tektronix 5 Series Mixed Signal Oscilloscope to observe the output waveform.

  5. Proper probe connection ensured accurate signal capture.

from manual of this device

Pin labels

  1. Acquisition and Cursors controls: Manage waveform acquisition, enable fast acquisition mode, set cursor parameters, and clear current acquisitions.
  2. Multipurpose knobs: Control cursor movement and configuration menu input values, with the ability to switch to Fine mode for precise adjustments.
  3. Trigger controls: Force trigger events, set trigger level and slope, and toggle between auto and normal trigger modes.
  4. Vertical controls: Adjust waveform position and scale, toggle channel display, and manage math, reference, and bus waveforms.
  5. Horizontal controls: Shift waveform position, adjust time scale, zoom in/out, and navigate through waveform records.
  6. Miscellaneous controls: Toggle touch screen, save instrument settings or screen captures, restore default settings, and perform autoset.
  7. Ground and Probe Compensation connectors: Provide grounding for anti-static protection and a source for probe compensation.
  8. USB Host ports: Connect USB flash drives or peripheral devices for data transfer or instrument control.
  9. FlexChannel probe connectors: Support various measurement probes and cables for signal acquisition.

Probe Pinout Probe pinout Oscilloscope Setup Oscilloscope Setup

  1. Testing with Magnets:
  2. Neodymium magnets were used to induce changes in the sensor’s output.
  3. Moving the magnets close to the sensor resulted in a high output, while moving them away or changing direction caused the output to go low.

connection setup

Testing with Magnets 4. Observing Output on Oscilloscope: - The oscilloscope displayed the output waveform, showing changes corresponding to the presence and movement of magnets.

Oscilloscope Output

Current Consumption

power suppy meter

  • The sensor’s current consumption during operation was measured at approximately 0.00675 A when supplied with a constant 5V.
  • When no external operation was performed, the output waveform remained a straight line without any significant variations.

Conclusion

Through our experimentation with the Hall Effect Sensor Breakout Board, we successfully visualized its output using an oscilloscope and observed changes in response to the presence and movement of magnets. This exploration aids in understanding the functionality and behavior of the sensor in different scenarios

Last update: May 8, 2024