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    Implement2

    From Wikiversity - Reading time: 2 min

    Problem Statement

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    • Figure out how many ohm resistor for voltmeter.
    • Figure out the shunt resistor.
    • How to parallel shunt resistor with voltmeter.
    • Test the converted ammeter.

    Lists, Source, Cost, Consumable

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    • One voltmeter, one 3amp power supply, one 0.3 ohm, one 1 ohm resistor, two 10k resistors, one bread board, three alligator jumpers, two wires.
    • These sources are from School supply.

    Designing the Implementation Process

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    The initial design
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    • Found this useful pdf file Conversion of voltmeter to ammeter
    • Replaced 1M voltmeter's resistor with 1 ohm resistor.
    • Tested the converted ammeter, the needle flip to another side of voltmeter.
      • Because the voltmeter's resistor is too small, and the voltmeter is in series connection.
    • Testing converted ammeter
      Testing converted ammeter
    • The current overloaded will cause meter broken.
    Final Design
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    • Keep following this pdf file Conversion of voltmeter to ammeter
    • Replace 1k resistor with 10k resistor.
    • Connect 0.3ohm power resistor in parallel with 2 poles of voltmeter on the back.
    • Converted ammeter
      Converted ammeter
    • Connect another 10k resistor in series with converted ammeter.
    • Connect the alligator jumpers with 3amp power supply, then turn on.
    Work flow
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    • solder 1k resistor off.
    • solder off this resistor
      solder off this resistor
    • Solder 10k resistor on.
    • 1k resistor
      1k resistor
    • Make 2 wires.
    • cut a piece of wire
      cut a piece of wire
    • pull 2 wires out
      pull 2 wires out
    • get 2 wires
      get 2 wires
    • Solder 2 wires with 0.3ohm power resistor.
    • 2 wires connect to 0.3 power resistor
      2 wires connect to 0.3 power resistor
    • 2 wires connect to 0.3 power resistor
      2 wires connect to 0.3 power resistor
    • 2 wires connect to 0.3 power resistor
      2 wires connect to 0.3 power resistor
    • 2 wires connect to 0.3 power resistor
      2 wires connect to 0.3 power resistor
    • Connect 0.3ohm power resistor to voltmeter.
    • convert voltmeter to ammeter
      convert voltmeter to ammeter
    • convert voltmeter to ammeter
      convert voltmeter to ammeter
    • Connect converted ammeter to the circuit.
    • connect meter to the circuit.
      connect meter to the circuit.
    Hardware/software function and safety
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    • The resistor may get burn up and melt when test a couple times.
    • Keep alert. When smell something burning check around.
    • This resistor get burn and melt.
    • resistor get burn up
      resistor get burn up
    Test and analysis procedures (hardware vs. software, acceptance vs. qualification)
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    • Turn on the 3amp power supply. If the needle flip to the middle, the converted ammeter is working.

    Poster

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    Next Steps

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    • Get a new voltmeter.
    • Follow the Work Flow.
    This article is licensed under CC BY-SA 3.0.
    Original source: https://en.wikiversity.org/wiki/Implement2
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