IC Pin-width Pin Headers

[Jasen Betts]

On 2017-12-10, Clocky <notgonn@happen.com> wrote:

I just tried it again with new strips and the iC's are loose. I can't
see how that could work reliably. How deep are yours?

chips are shipped with the pins splayed by about 10 degrees total,
this could give enougfh spring for short-term reliability if the
sockets are parallel,


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[Computer Nerd Kev]

Jasen Betts <jasen@xnet.co.nz> wrote:

On 2017-12-02, Computer Nerd Kev <not@telling.you.invalid> wrote:
I often find myself making and buying boards to fit into IC
soctets. Usually these use pin headers, but the standard pin
width is too thick to fit into machined pin IC sockets, tends
to damage the other (cheap) IC sockets, and can be unreliable
in ZIF sockets.

Pin width doesn't seem to be a commonly varied specification of
pin headers. Does anyone know where I could buy pin header
strips with IC socket compatible pins?

get machined pin headers

Thanks, I eventually discovered that they were what I was looking
for, now I'm just looking for a good supplier for ones that have
the same pin width and spacing of DIP ICs. As I said in another
post, I may just buy some I found with half the pin spacing
required and snip off every second pin.

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[Clocky]

On 11/12/2017 4:05 PM, Jasen Betts wrote:

On 2017-12-10, Clocky <notgonn@happen.com> wrote:

I just tried it again with new strips and the iC's are loose. I can't
see how that could work reliably. How deep are yours?


chips are shipped with the pins splayed by about 10 degrees total,
this could give enougfh spring for short-term reliability if the
sockets are parallel,

That might make for firmer contact to the plastic body but I'm not
convinced it would make for reliable electrical contact because the pins
themselves are still too narrow and too shallow.

I have explored this before but abandoned the idea and made up some
adapters.

 

[keithr0]

On 12/10/2017 9:22 PM, Clocky wrote:

On 10/12/2017 6:32 PM, keithr0 wrote:
On 12/10/2017 12:11 AM, Clocky wrote:
On 8/12/2017 6:04 PM, keithr0 wrote:
On 12/8/2017 7:59 AM, Computer Nerd Kev wrote:
keithr0 <user@account.invalid> wrote:
On 12/7/2017 7:33 AM, Computer Nerd Kev wrote:
keithr0 <user@account.invalid> wrote:
On 12/6/2017 8:15 AM, Computer Nerd Kev wrote:
Clocky <notgonn@happen.com> wrote:
On 4/12/2017 1:59 PM, Computer Nerd Kev wrote:
Computer Nerd Kev <not@telling.you.invalid> wrote:
And with a little more hunting around that site, I found the pin
header strips that I was after in the first place:
https://www.arieselec.com/products/data/12034-strip-line-header.htm


https://www.jaycar.com.au/40-pin-header-terminal-strip/p/HM3212

I use these to make plug in daughter boards.

They're just the normal pin header stips that I said didn't work
at the start of the thread. Great for sockets designed to accept
pin headers, not for those designed to accept ICs.

so you use these

http://www.altronics.com.au/p/p5390-oupiin-40-pin-header-socket/

cut to length, very useful to plug in ESP8266, ESP32, or Arduino nano
boards too.

You're missing the point. I want to plug into sockets where I can
also plug in ICs.

In the case that inspired the post, I discovered that I had been
delivered the wrong chip (long story) for a project I was building
on a PCB. Because there was going to be a 1week+ wait to get the
right chip, I decided to substitute another chip with functionality
similar enough for testing. But of course the replacement chip had
a completely different pin-out, so I dug out the DIP plugs (which I
pictured earlier), thanked the stars that they were also DIP16, and
wired the substitute chip up to match the used pins of the original
chip.

So I sat back and thought "that worked great, but what if the chip
had a different pin count? If I had strips of IC socket compatible
pins, I could do that for any size of chip I wanted. I could even
replace the pin headers on all my chip adapters so that they work
better in IC sockets and my breadboards." But it was not the first
time I had thought such things, and I knew that my attempts to
find pin headers with narrower pins had failed completely in the
past, so I ended up starting this thread.

I think that it is you that is missing the point, ICs plug into
these sockets just fine.

https://www.dropbox.com/s/ycjzg498yfy2gq8/ChipSocket.jpg?dl=0

Using these gives a much more flexible solution than actual IC
sockets, you can use them to make any IC compatible layout or any
layout that you wish, instead of using IC headers you just use proto
board with pin strips.

My earlier response doesn't seem to have materialised on my server
but the IC pins don't reach deep enough and are too narrow to make
proper contact as per that diagram.


It works for me.


I just tried it again with new strips and the iC's are loose. I can't
see how that could work reliably. How deep are yours?

That is not my experience, the pins are held well enough for most uses,
if I was going to use them in a vibration environment I'd add some form
of mechanical retention, but then that is normal practice for socketed
ICs in professional equipment.