Electromagnet levitation circuit LED not glowing

Discussion in 'Project Construction Technologies' started by aryankumar877, Oct 26, 2018.

  1. aryankumar877

    aryankumar877

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    [​IMG]
    I have not connected the electromagnet yet. Yet, the IR led is glowing but the LED light on the right side of the circuit is not glowing on connecting the supplies. Is there a problem in the circuit ? What could be that I connected wrong ?

    Here's a link to full explanation of the circuit --->

    https://www.electroschematics.com/6306/magnetic-levitation-circuit/
     
    aryankumar877, Oct 26, 2018
    #1
  2. aryankumar877

    kellys_eye

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    Construction issue? Operator issue? How can we tell?
     
    kellys_eye, Oct 26, 2018
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  3. aryankumar877

    davenn Moderator

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    your image wasn't showing ... was this it ?

    magnetic-levitation-circuit.gif

    if not please repost what image you tried to upload
     
    davenn, Oct 26, 2018
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  4. aryankumar877

    aryankumar877

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    So you mean the right led should glow without connecting the electromagnet ?
     
    aryankumar877, Oct 27, 2018
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  5. aryankumar877

    aryankumar877

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    Yes it's this one.
     
    aryankumar877, Oct 27, 2018
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  6. aryankumar877

    kellys_eye

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    Not necessarily. The error could be in your construction - is the LED fitted correctly etc? Is the rest of the circuit built properly? Only you can tell.
     
    kellys_eye, Oct 27, 2018
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  7. aryankumar877

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Yes, if it is constructed correctly the LED across the electromagnet should be on when there is nothing under the electromagnet.

    Pin 1 and pin 7 of the dual op-amp should be closer to the +e rail than the negative.

    The schematic shows a +/- 12V supply. Is that what you're using, or are you using a simple 12V supply?

    Depending on your power supply, the rapid switching of the electromagnet may affect the operation of the op-amps. Personally, I would decouple the power supplies.
     
    (*steve*), Oct 27, 2018
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  8. aryankumar877

    aryankumar877

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    do you mean .. the left op amp should have pin 1 towards + rail and the right one should have pin 7 towards the + rail ?
     
    aryankumar877, Oct 28, 2018
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  9. aryankumar877

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    The outputs of the op amps should be high.
     
    (*steve*), Oct 28, 2018
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  10. aryankumar877

    aryankumar877

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    Okay thanks..could I use two 12 V batteries and connect 1.the positive terminal of one battery to ground and the negative terminal of the same battery to the -12 V input. And 2. Vice versa for the second battery to give input for +12 V.
     
    aryankumar877, Oct 29, 2018
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  11. aryankumar877

    aryankumar877

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    O
    or should I rather opt for a DC supply.
     
    aryankumar877, Oct 29, 2018
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  12. aryankumar877

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Are you telling me you don't have a power supply right now? (No wonder it's not working)
     
    (*steve*), Oct 29, 2018
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  13. aryankumar877

    aryankumar877

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    Screenshot_20181101-024005__01.jpg will this work ? ( Using 12 v batteries)
     
    aryankumar877, Oct 31, 2018
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  14. aryankumar877

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Yes, that is correct.
     
    (*steve*), Oct 31, 2018
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