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Related Experiment Videos

A flexible low cost signal averager

H E Criswell, B Babcock

    Electroencephalography and Clinical Neurophysiology
    |October 1, 1978
    PubMed
    Summary

    This study presents a low-cost, 2-channel signal averager built using the KIM-1 microcomputer module. The device offers flexible sampling options and data output, with easy expansion to 8 channels.

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    Area of Science:

    • Electronics
    • Computer Engineering
    • Signal Processing

    Background:

    • Signal averaging is crucial for enhancing signal-to-noise ratio in experimental data.
    • Existing signal averagers can be expensive and complex.
    • Microcomputer-based solutions offer potential for cost-effective and flexible instrumentation.

    Purpose of the Study:

    • To describe the design and construction of a low-cost, 2-channel signal averager.
    • To demonstrate the use of the KIM-1 microcomputer module for data acquisition and processing.
    • To provide a versatile tool for signal analysis in various scientific applications.

    Main Methods:

    • A signal averager was assembled using the KIM-1 microcomputer module.
    • The system allows for selection of 128 or 256 samples per pass.
    • Variable sample times from 1 msec to 256 msec are supported.

    Main Results:

    • The 2-channel signal averager was constructed for under $500.
    • Averaged data can be visualized on an oscilloscope, recorded with a chart recorder, or stored on an audio cassette.
    • The system is expandable to 8 channels by adding memory for under $100.

    Conclusions:

    • A cost-effective and versatile 2-channel signal averager can be built using the KIM-1 microcomputer.
    • The design offers flexible data acquisition and output options suitable for various research needs.
    • The modular design allows for affordable expansion to multi-channel signal averaging.

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