[sdiy] demuxing 4017 inputs

[Tom Bugs]

Surely just needs a resistor to ground (eg 100k) on the clock input of 
the 4017? This'd get rid of the spurious triggerings you've got when 
there's nothing connected. Simple diode mixing should work out just fine 
from there....

bill bigrig wrote:
> Howdy,
>
>  I have 4 outputs from and inverter(just after a
> scmitt trigger), and can anyone tell me how these
> inputs, all tied together, can be separated and mixed
> to a single clock input of a 4017? Diodes seem to
> throw capacitance everywhere and the thing just
> triggers like a random machine gun. Should i try
> resistors on the individual inverter outs? I'm running
> the system at 5 volts. Even when I unplug the
> inverter, providing no inputs, the thing just runs
> like crazy. Are the summing diodes causing a
> capacitance thing to the inputs? I just need to know
> how to make 4 different signals work together to clock
> the 4017 input. No more than 1 line is high at the
> same time. I'm at a loss. Thanx
> Rig
>
>
>        
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