Doepfer

hi. 
i have the a161 hooked up to the a160, which receives the clock output from the a190. 
what i'd like to do (in view of recent posts i won't say "need" :)  ) is to have the 161 use 
other divisions from the 160 than those which go into it. i don't want to mess around at 
the 160, because all of this is happening on the fly.

i could of course order another 160, but maybe someone has found a workaround ?

cheers,

stu

> hi.
> i have the a161 hooked up to the a160, which receives the clock
> output from the a190.
> what i'd like to do (in view of recent posts i won't say "need"
> :)  ) is to have the 161 use
> other divisions from the 160 than those which go into it. i don't
> want to mess around at
> the 160, because all of this is happening on the fly.
>
> i could of course order another 160, but maybe someone has found
> a workaround ?
>
> cheers,
>
> stu

Two of the wires of the ribbon cable that is used to connect A-160 and A-161
carry the clock and the reset signal for the A-161. They are connected to
clock and reset of the A-160 (in detail the order of the 10 wires is
GND/GND/GND/GND/NC/NC/CLOCK/RESET/+12V/+12V. The two NC wires are connected
to the inverted Clock and Reset of the A-160 but are not used in the A-161.
If you connect the Clock (and maybe the Reset) input of the A-161 to another
signal (e.g. /2, /4, /8 of the A-160) the A-161 may run at different
divisions. You may also add a socket but you have to pay attention that this
input would be not protected and a negative voltage will destroy the A-161 !
Normally the digital inputs of A-100 modules are protected against negative
voltages (transistor buffers).

Best wishes
Dieter Doepfer

Wouldn't a simple diode provide sufficient protection from negative
voltages?

/Silas

On 6/4/07, hardware@doepfer.de <hardware@doepfer.de> wrote:
>
>   > hi.
> > i have the a161 hooked up to the a160, which receives the clock
> > output from the a190.
> > what i'd like to do (in view of recent posts i won't say "need"
> > :) ) is to have the 161 use
> > other divisions from the 160 than those which go into it. i don't
> > want to mess around at
> > the 160, because all of this is happening on the fly.
> >
> > i could of course order another 160, but maybe someone has found
> > a workaround ?
> >
> > cheers,
> >
> > stu
>
> Two of the wires of the ribbon cable that is used to connect A-160 and
> A-161
> carry the clock and the reset signal for the A-161. They are connected to
> clock and reset of the A-160 (in detail the order of the 10 wires is
> GND/GND/GND/GND/NC/NC/CLOCK/RESET/+12V/+12V. The two NC wires are
> connected
> to the inverted Clock and Reset of the A-160 but are not used in the
> A-161.
> If you connect the Clock (and maybe the Reset) input of the A-161 to
> another
> signal (e.g. /2, /4, /8 of the A-160) the A-161 may run at different
> divisions. You may also add a socket but you have to pay attention that
> this
> input would be not protected and a negative voltage will destroy the A-161
> !
> Normally the digital inputs of A-100 modules are protected against
> negative
> voltages (transistor buffers).
>
> Best wishes
> Dieter Doepfer
>
>  
>


[Non-text portions of this message have been removed]

> Wouldn't a simple diode provide sufficient protection from negative
> voltages?
>
> /Silas

In most cases a diode will be sufficient. In addition I'd recommend a serial
resistor to be on the safe side. I forgot to mention another peculiarity for
this modification: as the internal logic of the A-161 uses +12V the levels
of the signals (clock, reset) have be at least ~ 10V. 5V will not be
sufficient as for the regular gate/clock/trigger inputs of all A-100
modules.

Best wishes
Dieter Doepfer