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  1. KJ6EAD

    LED Organ Help

    Rohm makes several bandpass filters. I researched them previously and if I remember correctly, at least one had an operational mode that didn't require a microcontroller. http://www.rohm.com/products/lsi/sound/accessory/sel3.php#lineup
  2. KJ6EAD

    LED Organ Help

    You can get a single IC to do all the filtering and more. These have been used on lots of Arduino projects. http://www.mix-sig.com/datasheets/MSGEQ7.pdf
  3. KJ6EAD

    Strange connector needed

    He has a damaged cable-mounted socket. The male connector is on the chassis. This is atypical and the cable-mounted sockets are much more difficult to source.
  4. KJ6EAD

    Strange connector needed

    Like Dave said. Kycon KPJX-CM-4S http://domino2.kycon.com/catalog_PDF/Standard%20Catalog%20page/DC%20Power%20Connectors/SKPPX_KPJX.pdf RS Components has a similar product and Farnell probably does but you can't tell from the screwed up descriptions on their website.
  5. KJ6EAD

    First Electronics Project - Parts Approval Please :)

    No volume control? What are you planning on plugging in to J2?
  6. KJ6EAD

    Help needed in monitor solution

    A lot of low power consumer transmitters have a pi or t attenuator between the output amplifier and the antenna to reduce the power enough to comply with regulations.
  7. KJ6EAD

    Help needed in monitor solution

    That's a common misconception. CTCSS only prevents you from hearing transmissions that don't include your tone code by disabling your receiver's audio. Your receiver's front end will still lock onto the strongest signal on frequency. Users on the same frequency still interfere with each other...
  8. KJ6EAD

    Help needed in monitor solution

    The older baby monitors used 49.830 MHz. For a while there were some at 900MHz but the newer ones all seem to be 2.4GHz. I don't think the FCC allows continuous transmission on either FRS or GMRS.
  9. KJ6EAD

    Potentiometer cross-reference?

    I can't see a problem with your proposed substitution. 3852C-252-502H isn't listed as obsolete, it just isn't listed. 3852C-282-502A differs in the precision you mentioned and potentially there is some difference in the bushing (25 vs 28)...
  10. KJ6EAD

    Component identification help

    You can replace it with a NTE 5455. http://www.nteinc.com/specs/5400to5499/pdf/nte5452_58.pdf
  11. KJ6EAD

    LCD TV not displaying image

    That part sounds like an MOV transient suppressor. Photos would help.
  12. KJ6EAD

    LED sequencer using only JFETs

    He has a sequenced OFF circuit. The one I linked is the more traditional sequenced ON.
  13. KJ6EAD

    How to Identify Between which is IR sensor and which is reciver.....

    Manufacturers sometimes tint the emitter, not the detector.
  14. KJ6EAD

    LED sequencer using only JFETs

    Perhaps you can adapt a version of the Discrete Multistage Light Sequencer shown on this page: http://www.bowdenshobbycircuits.info/page5.htm#seq_1.gif.
  15. KJ6EAD

    Need a power relay

    Is it like this: http://www.datasheetarchive.com/DatasheetsImg/Datasheets-21/tnDSA-416311.jpg? If so, maybe you can use this: http://pewa.panasonic.com/assets/pcsd/catalog/jc-catalog.pdf.
  16. KJ6EAD

    3. way Light help

    There are numerous diagrams online for both 3-way and 4-way switch wiring if this is what you're looking for. Ordinary light switches are SPST, 3-way switches are SPDT and 4-way switches are DPDT, so make sure you have the right type...
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