Posted by Pier on September 13, 1999 at 14:08:55:
In Reply to: Re: Hagstrom Keyboard encoder connections posted by Mr SaLTy on September 12, 1999 at 04:51:03:
: I have an entire section devoted to this on my webpage. Take a look at it and if you have any more questions just drop me a line. It's under the arcade section under interface. hope that helps.
: : For example, with the following keys assigned (with no particular logic) in a simple 2 x 10 matrix:
: : 1-2-3-4-5-6-7-8-9-10
: : 1 A C X J L P W
: : 2 F G R I
: : Will I really have 7 wires traced back to the "1" pin (for keys A, C, X, J, L, P, W)? Turn that into a 2 X 22 matrix and, well, you get the idea...
Instead of using a terminal block and connecting the various wires to it, I just 'multiple-enlarged' (dunno how name it) the two ground-wires.
So instead of:
--
||---GroundA---X
||---GroundA---X
||---GroundA---X
||---GroundA---X
--
I made 1 long wire:
-----|---|---------|---|--------|
(| = connection at button).
It works very well and it's easier to track the grounds vs. button-wires (although the LONG ground-wires shouldn't go bad...)
Pier