[sdiy] Substitute for pin matrixes?

[karl dalen]

2010-01-23 skrev John Mahoney <jmahoney at gate.net>:
> >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!
> ...
> 
> Why must they latch -- wouldn't you be leaving the "pin"
> (magnet) in place?

Well, had the idea about a flat surface with printed symbols on.
>From your view i have to drill holes and use some sort of tubic
holders or somehow make the magnets stay put above the magnet
thats not the case with latching hall sensor! 

> What about magnets and reed switches? Maybe not dead cheap,

Hmm, could be an idea!

Reg
KD


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