[sdiy] Substitute for pin matrixes?

[karl dalen]

Any ideas around something that could be a reasonable substitute for
matrixes? It need to be quite small, small physical space, dead cheap
and widely easily acquired and have reasonable life time!

Guillemette matrixes cost a fortune are very small fiddly and has
a certain level of crosstalk, pins are far from cheap etc, looks nice..

Regular things people use to come up with are arrays of 3.5mm tele or 2,5mm
tele or 4mm bananas. But these are not dead cheap and quickly eats space.

Thats why i earlier asked about life of turned sockets!
Matrix Array made of IC rims!

My next idea was about IDC connectors and gold plated pin lists!
Low cost Cramp terminals sell sin bags of 100-250 can be had for
10-20 Euro, pin list's cost slightly more but it's dead cheap.
One takes a wire solder whatever ohm one want to use, crimp tube
over it, however  pins may stay alive quite long but the crimp
terminal will most likely not?

Then i thought about Merklin miniature railway sockets? 
Kind of sub miniature bananas. 2mm the usual suspects sell these
but they are far from dead cheap at least cheaper then 4mm standard
bananas.

I then tooled around using PCB SMB connectors, but are
there any cheap snapin SMB around? I haven't found any!

Sub Sub miniature SPDT switches are nice, however cost a fortune!

Anything electronic needs plenty of cmos muxes and latches and registers
to hold the shit and quickly eats up space, there are complete matrixes
in silicon but these are often HF /Video and are expensive.

Then i got this idea, latching hall sensor that latches a Cmos switch!
Are there any latching Hall sensors? i.e toggle state whenever magnetic field comes close? One could glue a tiny magnet to a match used to point at switches! 

Are there any other obscure pins, tubes, anything that could be
used to construct a inter connection?

Reg
KD


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