Singing cap

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #1

    Singing cap

    http://www.edn.com/design/components...rom-capacitors
    Never stop learning
    Basic LCD TV and Monitor troubleshooting guides.
    http://www.badcaps.net/forum/showthr...956#post305956

    Voltage Regulator (LDO) testing:
    http://www.badcaps.net/forum/showthr...999#post300999

    Inverter testing using old CFL:
    http://www.badcaps.net/forum/showthr...er+testing+cfl

    Tear down pictures : Hit the ">" Show Albums and stories" on the left side
    http://s807.photobucket.com/user/budm/library/

    TV Factory reset codes listing:
    http://www.badcaps.net/forum/showthread.php?t=24809
  • PeteS in CA
    Badcaps Legend
    • Aug 2005
    • 3579
    • USA, Unsure of Planet

    #2
    Re: Singing cap

    Well, I didn't hear Rod Serling narrating the article or see a posting date of April 1 ... this is something I'd not heard of, though I think it's an aspect of the piezoelectric effect, which I have heard of. A changing voltage causes the ceramic dielectric to flex with the applied voltage, this, in turn, creates a signal voltage which can interfere with or distort the original signal.

    This effect is more a concern in audio electronics. Switching P/Ss operate above 20KHz. If you work with audio electronics, go with film dielectric caps where possible - e.g. polyester, polycarbonate, polypropylene, polysulfone, polyphenylene sulfide.

    I wonder if rap music might cause "singing" ceramic caps to crack ...
    PeteS in CA

    Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
    ****************************
    To kill personal responsibility, initiative or success, punish it by taxing it. To encourage irresponsibility, improvidence, dependence and failure, reward it by subsidizing it.
    ****************************

    Comment

    Related Topics

    Collapse

    • chth96
      Is it possible to test small ceramic disc capacitor with analogue meter?
      by chth96
      I read EBOOK of Testing Electronic Component and found that

      "In order to test the small blue resin coated ceramic disk capacitor which has 104 50v specification,it is possible to test this small ceramic capacitor by making use of analogue meter.
      Set to times 10Kohm that has 12v output from the probe to check disorder of ceramic capacitor.
      It is not uncommon that testing result of digital capacitance meter is okay,But It show shorted reading when you check it with analogue meter."

      Is it really possible to test small ceramic disc capacitor with analogue...
      03-09-2024, 10:03 PM
    • Document Archive
      Surface Mount Fuses Fundamentals Datasheet
      by Document Archive
      TE Circuit Protection offers the widest selection of surface-mount fuses available for addressing a broad range of overcurrent protection applications. Helping to prevent costly damage and promote a safe environment for electronic and electrical equipment, our single-use chip fuses provide performance stability to support applications with current ratings from .5A up to 20A.

      TE Circuit Protection also offers the telecom FT600 fuse for telecommunications applications. This telecom fuse helps comply with North American overcurrent protection requirements, including Telcordia, GR-1089,...
      10-07-2024, 06:07 AM
    • spleenharvester
      Ceramic capacitors/resistors - do suppliers matter?
      by spleenharvester
      I want to buy one of those SMD component books so I don't have to spend as much time searching my scrap boards for what I need, specifically ceramic caps and resistors as they seem to be what I spend most of my time replacing. But the only ones I can find are no name brands. Does manufacturer matter as much for SMD parts as it does with electrolytics or is the generic stuff likely to be fine?
      05-01-2025, 05:34 PM
    • Wolf1977
      dead transformer on ceramic oven
      by Wolf1977
      hi in ceramic oven the transformer is damaged
      and writes
      2x115v/2x12v/6VA 50-60hz ta105/f
      can you suggest me a compatible transformer ;
      i have found in 70 degrees celsius do you think is suitable for ceramic oven ;
      09-02-2023, 03:43 PM
    • Chaks
      Ground Plane For 5dBi ISM Band 865-870Mhz Embedded Ceramic Antenna
      by Chaks
      TAOGLAS ANTENNA MODEL: ISPC.86A.09.0092E

      The specs says ...
      High antenna efficiency 868MHz ISM Band
      5dBi Peak (when placed on 30cm x30cm ground plane) - Broadside to Zenith Radiation Pattern

      The antenna is 50x50 mm square and How do I fix it on the Ground Plane of 300 x 300 mm (aluminium sheet 3mm thick).

      1. Should I Fix it with a glue.
      2. Should I fix it with a double side adhesive tape
      3. Should I fix it with Screws (the screw head may just clamp the antenna to the aluminium...
      12-09-2024, 11:06 AM
    • Loading...
    • No more items.
    Working...