13 responses to “EEVblog #304 – Mailbag”

• Philip Freidin July 5th, 2012 at 15:45

  No need to be ashamed by item 1, it takes all kinds to make the world go round, and to each his (or her) own.

  Reply

• bruno July 5th, 2012 at 16:04

  Hey Dave.

  I was thinking, for the broken LCD window, couldn’t you remove most of the broken glass, and then pour some 2-part clear epoxy on top? Or would shrinkage, heat dissipation (while the mix cures), or whatever, cause problems?

  As for CC dummy loads, are those a bit like DMM’s, where you can’t really have too many of them?

  Regards
  Bruno

  Reply

• pan July 5th, 2012 at 18:49

  at 3:00 i was SO expecting it to be an accompanying dildo :p

  Reply

• f4eru July 5th, 2012 at 20:09

  Take the dress appart ))
  I vote for a teardown (on an appropriate model

  Reply

• snoopy July 5th, 2012 at 21:13

  I have the exact same digital calipers which I bought from a computer swap meet for 20 bucks. It came in a nice plastic case so I am surprised that yours didn’t. Believe it or not these are very high quality compared to a lot of others. The residual offset can be reset by pressing the zero button. They are great for measuring up stuff when you are laying out pcbs’s.

  Reply

  • huh July 6th, 2012 at 04:23

    Same caliper here, nice plastic case included.
    If that port allows reading their measured data, these cheap calipers could be hacked into linear encoders for CNC machines or robotics.

    Reply

  • Goophy69 July 7th, 2012 at 03:49

    Same here, but 9 bulks from ebay

    Reply

• Roger July 6th, 2012 at 00:32

  Re. the C C dummy load.
  For longer use when the power-dissipation on the heat-sink gets to high. Connect a power-resistor in series with the load. If you calculate the value with regards to the current and the voltage you can make most of the power dissipate in the resistor. A power-resistor can stand much higher temperatures than a mosfet.
  Just don´t burn yourself on it!
  I have used this in a 12V 100A CC load for a long time. Works great!

  Keep it up Dave!

  Roger

  Reply

• Richard July 6th, 2012 at 17:42

  Does anyone know where the nice PCB mounted BNC connector can be obtained from / what it’s part number is?

  Thanks all,
  Richard

  (Shamelessly crossposted here after first posting to the dedicated video #306)

  Reply

  • Philip Freidin July 6th, 2012 at 17:50

    It is called a “Board Edge End Launch” connector. For example, this looks like what the board uses: http://www.digikey.com/product-detail/en/361V504ER/991-1036-ND/2355574

    Reply

  • Philip Freidin July 6th, 2012 at 17:52

    And here it is with the panel mount thread:

    http://www.digikey.com/product-detail/en/361V504EFT/991-1035-ND/2355573

    Reply

    • Richard July 7th, 2012 at 06:45

      Thank you very much!

      Reply

    • Drone July 8th, 2012 at 01:46

      Nice connector find. I wish these came with a threaded end and a “D” cut to prevent them from spinning if the panel nuts come loose.

      Also, if you panel or box-mount these type of board-captive connectors, make sure your panel or box is thick and robust so the connector doesn’t flex when you hang a lot of stuff on it. Otherwise it will stress the board connection (especially is soldered with RoHS compliant solder).

      I know this from experience. More than once I’ve encountered the likes of VSAT transceivers that use connectors like this but don’t pay proper attention to mechanical design – fail.

      Regards, David in Jakarta

      Reply