[sdiy] strange sequencer behavior

[Ken Stone]

You've mixed your chip types.

Use a 4030 instead of the 74HC86. The 4024 outputs probably looks like ramps
to the faster chip.

Ken 

>hi.
>
>i got some strange behavior from my sequencer last days. i added a feature
>shown in [0]. the 4024 counter and the 74hc85 comparator. this way i'm
>able to encode the length of the sequence as a binary word. i.e. if i set
>the switches to 0100 the sequence resets after the 4th stage. this works
>well for slow speed. but if i tune the speed up it does the following: it
>counts 1, 2, 3, 4, as it should do, then leaves out 5 and 6 (and somtimes
>7) and ounts on from 7 (or 8) through 16. this occurs only at a higher
>speed, if i slow it down again it works as it should do.
>
>any hints?
>
>greetings, sven.
>
>-- 
>To some ears, "computational philosophy of science" will
>sound like the most self-contradictory enterprise in
>philosophy since business ethics.
>[Paul Thagard in "Computational Philosophy of Science"]
>
_______________________________________________________________________
Ken Stone   sasami at hotkey.net.au  
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
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