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silver metal case in IR receivers — Parallax Forums

silver metal case in IR receivers

FrannyFranny Posts: 127
in Accessories
what are the silver metal case in IR receivers for? is it directionality purposes?

Comments

  • jmgjmg Posts: 15,173
    I think that is usually shielding, for RFI/EMC protection.
  • FrannyFranny Posts: 127
    Thanks!
  • BabaBaba Posts: 9
    If you mean the bright silver reflector that is shaped in a quasi-parabolic form; that is the dish that picks up incoming IR and focuses it on the receiving diode---keep these clean, a little dust can dramatically alter the focus pattern---
  • ercoerco Posts: 20,256
    edited 2015-10-15 16:47
    jmg wrote: »
    I think that is usually shielding, for RFI/EMC protection.

    Roger that. The metal shield is sometimes removeable, but it doesn't hurt anything. Functionally the same as non-shielded types, and 95% follow the pinout attached in the next post (why can't I add it here?).

    s-l1600.jpg

    s-l1600.jpg



  • ercoerco Posts: 20,256
    Pinout attached
    Figure 4.jpg
    600 x 300 - 31K
  • GenetixGenetix Posts: 1,754
    I have several BS2 kits and some came with metal IR receivers while others were plastic.

    The metal ones I have are made by a Chinese company called Waitrony and they have an Omega (rounded w) logo on them.
  • FrannyFranny Posts: 127
    Cool, I should probably take both, do the IR remote test, walk around and see the response, see how do both react when triggered from the back...
  • ercoerco Posts: 20,256
    They are directional but will usually pick up a strong remote control signal from behind which gets reflected from a background wall. Many robots & toys aim the sensor up for best omnidirectional coverage.
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