[sdiy] Substitute for pin matrixes?

[karl dalen]

>Assi wrote:
> > random either as long it dont end up in MT8816's! ;)
> 
> how are we supposed to do any thinking when you hog all the
> exclamation marks?

What you see is not what you think you feel!! ;)
Ok,I will start to use £ instead.
 
> A patch matrix is nothing but a bunch of wires and some
> resistors connecting them, so if you don't mind the looks, just take
> a proto 
> board solder down a set of IC socket strips with two thirds
> of the contacts removed (the leaf-type contacts are cheaper and
> work better for this than machined):
> 
> ++o++o++o++o++o++o++o++o
> +o++o++o++o++o++o++o++o+
> ........................
> ++o++o++o++o++o++o++o++o
> +o++o++o++o++o++o++o++o+
> ........................
> ++o++o++o++o++o++o++o++o
> +o++o++o++o++o++o++o++o+
> ........................
> 
> Then connect the sockets in one row horizontally, the
> contacts in the 
> other row vertically with some wire on the back and rig
> some plain 
> through-hole resistors with a glob of expoxy so that the
> wires stick 
> out the same side a bit like that:
> 
> +------####----
> |      ####
> +-||||||###----
> 
> Build yourself a jig so that the wires are the same
> distance as the 
> contacts in your matrix so you can just poke them into the
> contacts in 
> lieu of matrix pins.  It's small, it's cheap, and you
> can have it 
> working this evening.  If you don't have the epoxy it
> still works, 
> just a bit more fiddly.  You can do more or less the
> same thing (but 
> not looking anything like a matrix) with solderless
> breadboards and a 
> few resistors solders to flying leads.  I've done a
> "memory card" on 
> such a solderless breadboard for my Q+ that I've been using
> for years 
> now.  Initially it was just meant to be a test, but it
> turned out to 
> work so well that I couldn't be bothered to do a PCB and
> case.

Similar to what paul perry suggested£ The ting are, it has to
be repeatable (again), not just a on off as i mentioned earlier£

IC holders wont last long enough as pointed out by some one
earlier, 100 times aint much£ You claim working for several
years?

It seams to boil down onto the life time of the mating female
socket no matter mechanical principle.

KD


      __________________________________________________________
Ta semester! - sök efter resor hos Kelkoo.
Jämför pris på flygbiljetter och hotellrum här:
http://www.kelkoo.se/c-169901-resor-biljetter.html?partnerId=96914052