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Lab concerning Inverters experiement

  1. Sep 15, 2011 #1
    I have to conduct a lab concerning inverters. I'm using a 7404 hex inverter IC, 6 LED's with 150Ω resisters, and 1 logic switch. Can someone tone it down a little bit so I can undersetand what the lab is wanting me to do? And what does the image on the second page show (Figure 3-7 and 3-8)?

    For table 3-6: 1, 0 going down. Questions: (2.) 0 (3.) 0 (4.) logical 1 (5.) Boolean expression not A means A is inverted.

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  2. jcsd
  3. Sep 16, 2011 #2

    rude man

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    All you're doing is wiring up the LED's and 7404 so that every other LED is lit. In switch position 1, LED's 1, 3 and 5 light. In position 2, LED's 2, 4 & 6 light.

    Not really comparable in difficulty to the Millikan oil drop experiment .... :-)
  4. Sep 16, 2011 #3


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    Your answer to question 4 assumes a logical 1 input. You could say that the logical state of the output will be the logical state of the input.

    The images are schematic diagrams which show 2 circuit configurations. I see an input terminal for a switch, an inverter, a LED, and a resistor on the first diagram, same on the second diagram, but with multiple inverters and LEDs. The numbers near the input and output of each inverter give you a reference to a specific pin on the IC.

    You should familiarize yourself with the datasheet: http://www.onsemi.com/pub_link/Collateral/74HC04.REV1.PDF
    Last edited by a moderator: Apr 26, 2017
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