[sdiy] Substitute for pin matrixes? Probability list update.

[Dave Manley]

Dave Manley wrote:
> karl dalen wrote:
>> 20:...............?
>>   
> cheap switches like are used in a qwerty keyboard, the latching action 
> is via heavy marbles or ball bearings placed on top the switches.
>
> you could also devise some sort of mechanical friction or twisting 
> solution to hold the keys down
guess I should have read through to the end of the 400 postings, as I 
see ball bearings get mentioned later.

IIRC, the ball-bearing sequencer was in a copy of Make magazine.

-Dave