[sdiy] small ,higher than 8 input multiplexers?

[Tom Wiltshire]

Sorry Dave, but I'm with Ingo. You don't need the 2-to-1 multiplexer  
afterwards. you can just use multiple 4051s and only enable one of 'em.

I've done this multiplexing CVs from a control panel into an ADC. The  
panel is broken up into groups of eight, each of which has a 4051.  
The master uP can select which control board it is reading, and which  
pot on that board just by doing a bit of address decoding. I designed  
for up to 64 pots like this, but haven't (quite) used them all.

T.

On 23 Jul 2009, at 18:43, Ingo Debus wrote:

>
> Am 23.07.2009 um 17:50 schrieb Dan Snazelle:
>
>> i am doing some crazy stuff with multiplexers and am starting to  
>> think 8 inputs is just not enough
>
> Why not gang several 4051s together? Connect the pins 3 of all  
> chips and enable only one of them, disable all the others (via the  
> inhibit pins).
>
> Ingo
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