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I was researching projects and I saw a PCB. I am wondering what is this component. I don't know what it is so I want to ask you, what is this component? Is this a microphone? I am asking about this big white thing.

enter image description here

Top side:

Bottom side:

enter image description here

Another PCB design, again they say they use microphone.

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  • \$\begingroup\$ What does the PCB do? Doesn't look like a microphone or a speaker to me. \$\endgroup\$
    – DKNguyen
    Dec 9, 2021 at 6:03
  • \$\begingroup\$ I thought it is a microphone because they say they are processing sound. I added full PCB on question. \$\endgroup\$ Dec 9, 2021 at 6:13
  • \$\begingroup\$ A view from a bit further away would help. The photos are so close it's hard to see the 3D structure of the part. \$\endgroup\$
    – DamienD
    Dec 10, 2021 at 10:01
  • \$\begingroup\$ I added one more photo. \$\endgroup\$ Dec 10, 2021 at 11:30
  • \$\begingroup\$ Please add a photo taken from a side angle so we can see how tall it is and what is underneath it. \$\endgroup\$
    – AnalogKid
    Dec 10, 2021 at 12:29

1 Answer 1

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It's a light guide, a piece of plastic that is intended to be illuminated by a LED.

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  • \$\begingroup\$ Okay, thank you. I thought it is a microphone because they say they are processing sound. I added full PCB on question. \$\endgroup\$ Dec 9, 2021 at 6:12

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