Mounting IC pefered ????

Discussion in 'General Electronics Chat' started by Dr.killjoy, Dec 12, 2013.

  1. Dr.killjoy

    Thread Starter Well-Known Member

    Apr 28, 2013
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    How do you guys mount your IC? ??? I like soldering them but it's not good when testing or building prototype boards .. I was thinking about using IC sockets but they are not cheap and was thinking about picking up IC breakaway socket rails but I wanted to see what you guys use....






    Thanks
    Jason SR
     
  2. k7elp60

    Senior Member

    Nov 4, 2008
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    I am not sure if you are talking about 8pin thru 18 pin .300 spacing pins, or 24 thru 48 pin 0.6 spacing. All of those sizes I use sockets generally the dual wipe like mouser #517-4816-3000-cp.
     
  3. ErnieM

    AAC Fanatic!

    Apr 24, 2011
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    Breakaway strips can work but real sockets are always best. You can find then on Ebay for as little as 20 cents a piece for 5 and free shipping. Probably much less if you buy some quantity.

    Also, I make 14 dip from 16 pins with a belt sander.
     
  4. Dr.killjoy

    Thread Starter Well-Known Member

    Apr 28, 2013
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    I am talking about using these just like the old school socket
    [​IMG]

    Instead of these
    [​IMG]
     
  5. THE_RB

    AAC Fanatic!

    Feb 11, 2008
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    I always use sockets and usually buy them cheap in bulk or in sticks.

    I still use sockets even when most of my micro projects use and ICSP connector.
     
  6. ErnieM

    AAC Fanatic!

    Apr 24, 2011
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    Yeah I get that. Sockets designed to be sockets are better until IC leads begin to look like this:

    [​IMG]

    That is the pin your socket was designed for.
     
  7. ian field

    Distinguished Member

    Oct 27, 2012
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    If a jobs worth doing, its worth doing well.

    Whether you use breakaway strips or standard sizes of IC socket, you might as well go for the best and use the turned pin type - the cheapo sockets with leaf type contacts tend to dig into the pin - at best the chip can be a struggle to pry out of the socket, at worse the dug in contact won't let go and gets ripped out of the header!

    Decent sockets are only expensive if you buy from rip-off merchants like Maplin, If you buy a reasonable quantity (minimum order charge!) from the likes of Farnell, the prices aren't that bad.

    Bear in mind that RF & very low impedance circuits usually don't get on well with any kind of socket.
     
  8. matty204359

    Member

    Apr 6, 2011
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    I'm curious how modern computers handle this, most cpus use a ZIF socket and pci cards just kinda slip in.
     
  9. ian field

    Distinguished Member

    Oct 27, 2012
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    Can you imagine trying to pry that many pins out of a regular (non ZIF) socket!

    Originally; PCB edge connectors were gold plated, its a good conductor and very smooth - practically self lubricating, so very little insertion wear. I've heard that some manufacturers have been doing it on the cheap by using phosphor-bronze instead.

    Its fortunately rare, but some PCB edge connector receptacles are badly designed so the contacts dig into the pcb contact fingers so the contact leaves rip out when you pull the board out!
     
  10. matty204359

    Member

    Apr 6, 2011
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    actually I dont have to imagine , I remember pulling a 20 MHz 386 to replace it with a 25 MHz 386.

    i don't know if other 386 motherboards had zif sockets but my mother board didn't. the old 20 MHz 386 ic was not recoverable.
     
  11. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    From the manufacturer's point of view, the design is good. The consumer must purchase a new card if the original is removed -or- if it is unlikely the original is ever removed, then why waste money on gold plating!
     
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