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rf transmitter burned :( — Parallax Forums

rf transmitter burned :(

earl_24earl_24 Posts: 9
edited 2008-03-28 22:29 in BASIC Stamp
can you tell me please what represent the element from the image? It is burned and i must change it.
27980-L.jpg
700 x 1002 - 46K

Comments

  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2008-03-28 19:39
    Hello,

    That is a 10uF Tantalum SMD capacitor used for filtering the supply lines coming into the module. If it has been damaged and the transmitter does not work, this is most likely due to over-voltage on the power supply pins and there is likely more damage than just that capacitor.

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    Chris Savage
    Parallax Tech Support
  • stephenwagnerstephenwagner Posts: 147
    edited 2008-03-28 19:52
    Ten (10) followed by six (6) zeros, units of measure, pico farid (pF) capacitor.

    10000000 pF
    10000 nF
    10 uF

    It is a 10 uF electrolitic capacitor. Probly on the order of not to exceed·5 to 15 working volts DC. The band is the positive end.

    Did you apply more then 5 VDC to the device???

    More then 5.2 VDC to the RF module will damage the RF module.

    The TXM 433 LR S data sheet can be found here under LC (low cost) LR (long range) links.
    http://www.linxtechnologies.com/Products/RF-Modules/LC-Series-Low-Cost-Transmitter-and-Receiver-Modules/


    I hope this helps.


    SJW

    ·
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2008-03-28 20:09
    Applying a reverse voltage to a tantalum cap will destroy it, too, sometimes spectacularly.

    -Phil
  • earl_24earl_24 Posts: 9
    edited 2008-03-28 20:46
    thanks guys. if I will change the capacitor there is a chance that the RF transmitter will work again?
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2008-03-28 21:33
    What did you do to damage the unit? Over-voltage or reverse polarity?

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    Chris Savage
    Parallax Tech Support
  • earl_24earl_24 Posts: 9
    edited 2008-03-28 22:11
    reverse polarity
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2008-03-28 22:29
    That may have damaged the Lynx chip.

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    Chris Savage
    Parallax Tech Support
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