Date : Fri, 05 Feb 2016 22:22:17 -0000
From : blip@... (John)
Subject: Chip extractors - any recommendations?
- I'll take that as a 'no' then, JG...
Is that it - is there nothing out there for less than a tenner to take out
chips than screwdrivers and brackets? Thought things would have moved on in
20 odd years...
I do have a spare PCI card bracket as it happens.
JT
-----Original Message-----
From: bbc-micro-bounces+blip=blipit.com@...
[mailto:bbc-micro-bounces+blip=blipit.com@...] On Behalf Of
J.G.Harston
Sent: Thursday, February 4, 2016 10:36 PM
To: bbc-micro@...
Subject: Re: [BBC-Micro] Chip extractors - any recommendations?
Blip wrote:
> As part of the OU project I've already talked about, I wonder if
> anyone has any recommendations around what to use for chip extraction?
> I was looking at this one:
> http://www.amazon.co.uk/quality-Integrated-Circuit-Extractor-engineer/
> dp/B000TGLSVK/ref=sr_1_1?ie=UTF8&qid=1454621800&sr=8-1&keywords=chip+e
> xtractor+-dust
No no no no! :( You need something where you control the extraction.
With something like that the grip of the socket on the IC pins drops
suddenly, faster than you can react and stop pulling, resulting in crushed
pins. You need a method where as the friction drops to zero the movement
also drops to zero. A lever.
What I use is an old PC expansion slot blanking plate with a bit cut off so
it fits under an IC, this here:
http://pics.mdfs.net/2016/02/160201.htm
It's a L-shaped strip of metal, about three inches long, half an inch wide,
with the foot of the 'L' about 1/4 of an inch long. As you lever up the IC
when the friction drops to zero the IC moves no further than where you have
levered it to. It is impossible for you to lose control.
It's an L-shaped equivalent of putting a screwdriver under the edge of an IC
and rotating the screwdriver. The friction is soley holding the IC in, it is
not controlling the force you are applying.
(rant)
It puzzles me how these things sold as "IC extractors" continue to exist
when they patently do more damage than their purported function and how
people fail to notice that they don't function. I lost count of the number
of destroyed EPROMs my colleagues produced using the "yank and pray" method.
It's because people see them sold as "IC extractors" so assume that they
function as IC extractors. So, there must be something wrong with how they
use them, it never occurs to them that what is purported to be reality
isn't. Like how people believe you give birth inside a tent because that's
what they see in TV shows and films, rather than that's what they show in TV
shows and films because that's what the regulators allow to be shown, not
what actually happens in reality.
(/rant)
--
J.G.Harston - jgh@... - mdfs.net/jgh
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