Wow, very versatile, but alas also a bit pricey :-(
Let's see what Zoë comes up with :-)

--- In Doepfer_a100@yahoogroups.com , Martin Klang <mars@...> wrote:
>
>
> Agreed.
> Snazzy FX Ardcore, essentially an Arduino in Eurorack format, is perfect for the job.
>
> /m
>
> On 1 Jul 2012, at 07:47, Zoë Blade wrote:
>
> > You know, such a module is fantastically simple to implement in software using, say, an Arduino board. Solder on some CV inputs for root pitch and clock speed, and a button and some LEDs for scale, some others for direction (up, down, pingpong), a switch for one-shot / loop, and some CV outputs for pitch and gate. Then probably a few dozen or so lines of C code, written over a few days, should be sufficient. If there's not enough interest for a proper commercial arpeggiator module, I could whip up an amateur one like that over a few days. (Alas, as to *which* few days), it would have to be after I've finished Stepper Acid and a few other projects, which are actually more complex than an arpeggiator anyway. I would have made the arpeggiator first if I had any use for it, but I simply do the arpeggiation in MIDI before converting to CV as it's more versatile that way.)
>