Doepfer

Hi Paul,

This should be quite easy to do: the divided-down clock signal is 
actually already available in the A-155, as an unused pin (on the 
CD4024 on the 'controller board'), so you don't need to replicate the 
A-160; then you'd just need to replicate the A-150, which could be 
done with a single chip (plus maybe a few diodes and things if you 
wanted to know which half of the sixteen it was in). The older 150's 
used the CD4053 (two in fact, but you could make do with just 1), 
which _are_ cheap; the newer 150's use DG409's which are much more 
expensive (perhaps maybe ten times so!), but I'm not familar with 
them (i.e. I don't have a newer 150).

A little more thought would probably determine whether it was 
possible to leave the whole lot permanently wired in, so that you 
wouldn't need to switch it at all, just hook up to two (new) sockets 
when you wanted to go to 16 steps. Eminently do-able!

Tim


--- In Doepfer_a100@yahoogroups.com, "Paul Wagorn" <pwagorn@p...> 
wrote:
> 
> It seems to me that being able to switch the 155 over to a 16 step 
in stead
> of dual 8 is fairly straightforward using 2 other modules.
> 
> Rather than have to rig this up every time one would want to use 16 
steps, I
> was thinking that it may be a very simple thing to rig up an 
adapter with a
> couple of logic IC's for less than $1 to duplicate this 
functionality.
> 
> This 'adapter' would & would save using a couple of modules to 
perform this
> simple task, and would make it quicker to switch between 8 & 16 
steps.  Of
> course this could all me mounted in the sequencer, but a little 
adapter box
> would do just as wel (perhaps there will be a version of the 155 
with a
> switch like this built in one day?)
> 
> Has anyone tried to make anything like this?  Or does everyone just 
use (or
> buy id they don't already have) the extra modules & leave them 
dedicated to
> this purpose?
> 
> I was thinking of making something like this, but would love to 
hear from
> anyone else who has tied the same.
> 
> Paul