Hi Blaine!
If you are in the situation that you can change the source code then you have more features of course.
I bet that it would be possible to add some encoders for interesting parameters if there is enough space in the eprom.
In this case you can maybe complete bypass the keyboard matrix and could add maybe an 8 bit port for 4
encoders on a free I/O address and the software does the encoding and parameter changes.
In theory it would be possible but its work that has to be done, and of course some tesing.
Ciao
Peter
________________________________________
Von:
korgpolyex@yahoogroups.com [
korgpolyex@yahoogroups.com] im Auftrag von bimmerfan222 [
bperkins211@...]
Gesendet: Samstag, 14. April 2012 17:26
An:
korgpolyex@yahoogroups.comBetreff: [korgpolyex] @ Ulrich--Re: rotary data dial +/-
Hmmm...
I'm thinking maybe Mike might be able to do a little bit of code magic to make the CPU scan for activity from rotary encoders/decoders and direct their signals to the appropriate parameters.
Wouldnt it be possible to add another demultiplexer in the Korg.. pardon my ignorance if I get the language incorrect.. but aren't the original push buttons on the 800's in a "matrix"... so that a demultiplexer reads the matrix and converts it into a data stream for the CPU to read?
I'm just thinking that instead of trying to build a mechanical latching system (to emu the real push button switches), use direct pulse signals from several encoders/decoders that would send just signals out direct. Bypassing the switches all together.
-Blaine
--- In korgpolyex@yahoogroups.com, Ullrich Peter <peter.ullrich@...> wrote:
>
> Hi Blaine!
>
> You are welcome!
>
> Regarding the ELM402: As it is intended for CMOS this would not disturb as the chip alone is not enough.
> You would add CMOS analog switches anyway if you want the addon installed in parallel with the
> Synths plus/minus buttons. And even if the other parts are NMOS you will get no problems as long as the
> Voltage range is maximum 5V. And the advantage is that you can use it in wide voltage range from 2 to 5V!
>
> Remark: My datadial works in the range from 3.3 to 5V (as I programmed the brownout detector to get a well
> working reset of the microcontroller).
>
> Ciao
> Peter
>
> -----Ursprüngliche Nachricht-----
> Von: korgpolyex@yahoogroups.com [mailto:korgpolyex@yahoogroups.com] Im Auftrag von bimmerfan222
> Gesendet: Mittwoch, 11. April 2012 05:35
> An: korgpolyex@yahoogroups.com
> Betreff: [korgpolyex] @ Ulrich--Re: rotary data dial +/-
>
> Hi Peter-
>
> Thanks for taking time to explain your datadial.
>
> I now see why your board and design costs more.. it's that ability to set the pulse width/time.. very clever indeed.
> And I think we all know that having custom cast circuit boards do not come cheap! That alone is probably half the cost when it comes to low quantities.
>
> Very nice contribution to the synth modder hobbiest community.
>
> Regarding the ELM402, I agree that the 2ms PW would be the better one to use on a slightly slow 8502 MP. The datasheet said it is built in mind for CMOS applications.. but actually testing it on the synth would be the only real way to find out.
>
>
>
> -Blaine
>
>
> --- In korgpolyex@yahoogroups.com, Ullrich Peter <peter.ullrich@> wrote:
> >
> > Hi!
> >
> > Regarding my email from yesterday. I didn’t have a look at the
> > datasheet of the ELM402. I thought that it is the datasheet of the encoder itself and not a converter chip.
> >
> > The chip is nice (quite similar to my solution) but the output pulse
> > width can only be selected between
> > 0.2 or 2ms.
> > I would say that 2ms will be the better value for synths as the scan rate is normally in the range of 100 to 2000Hz.
> > So I think it might fit for 80% of the synths. You could get problems
> > if the scan rate is slow because the short pulses could be missed.
> > Some older synth scan quite slow…
> >
> > If you only want the chips then I could offer you my chips as well.
> > Prices would be the same as the
> > EML402 (8.50$ DIL / 10$ SMD) but compare to these chips you can adjust
> > the pulse/pause time via the encoder â€" more flexibility that should match for every synth.
> > So it is cheaper than the complete datadial module but then you have
> > to integrate the chip on a PCB…
> >
> > For the SMD sockets I would need a lead time as I would have to buy a
> > SMD test socket for chip programming and would have to build a programming adapter.
> >
> > Ciao
> > Peter
> >
> > http://www.ullrich.at.tt
> > http://go.to/datadial (synth addon)
> >
> > ________________________________
> > From: bimmerfan222 <bperkins211@<mailto:bperkins211@>>
> > To: korgpolyex@yahoogroups.com<mailto:korgpolyex@yahoogroups.com>
> > Sent: Monday, April 9, 2012 10:26 PM
> > Subject: [korgpolyex] Re: rotary data dial +/-
> >
> >
> >
> > Hi Gordon, thanks for the reply.
> >
> > Surely there is a way to slip in a rotary encoder to mimic a up\down value keys..
> >
> > I was thinking of using this decoder by
> > elmelectronics.com<http://elmelectronics.com>
> >
> > http://elmelectronics.com/DSheets/ELM402DS.pdf
> >
> > couldnt the outputs be placed in parallel with the value switches?
> >
> > It can be set to generate 2.0msec pulses on two channels
> >
> > --- In korgpolyex@yahoogroups.com<mailto:korgpolyex%40yahoogroups.com>, Gordon JC Pearc e <gordon@<mailto:gordon@>> wrote:
> > >
> > > On 08/04/12 16:09, bimmerfan222 wrote:
> > >
> > > > I've yet to see an 800 with this simple, yet very helpful mod and am a little dumbfounded that it has not yet been done.
> > > > Debouncing is key to getting a smooth signal out to the triggers, otherwise you'd end up getting wild jumps in up/down values when moving the knob slow or fast.
> > >
> > > No, you won't.
> > >
> > > You'll get a rotary encoder that has to be turned painfully slowly
> > > to avoid it missing steps. The buttons are already debounced, and
> > > have quite a long debounce time.
> > >
> > > --
> > > Gordonjcp MM0YEQ
> > >
> >
> >
> >
> >
> >
> > The information contained in this e-mail message is privileged and
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> > who receives this message and who is not the addressee, one of his
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> > informed that he may not use, disclose or reproduce the contents
> > thereof, and is kindly asked to notify the sender and delete the
> > e-mail immediately.
> >
>
>
>
>
> ------------------------------------
>
> Feel free to upload into the files section any sysex dumps and tape dumps of patches that you may have but please discuss (with the entire group) the posting of other files ∗before∗ posting them. This helps us to keep redundant information from showing up everywhere and also allows us to constantly improve the format and structure of the documentation. We talk about the HAWK-800 quite a bit but we also discuss and help owners of the original Poly-800 models. So don't be shy if you haven't got the HAWK-800.Yahoo! Groups Links
>
>
>
> The information contained in this e-mail message is privileged and
> confidential and is for the exclusive use of the addressee. The person
> who receives this message and who is not the addressee, one of his
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> informed that he may not use, disclose or reproduce the contents
> thereof, and is kindly asked to notify the sender and delete the e-mail
> immediately.
>
------------------------------------
Feel free to upload into the files section any sysex dumps and tape dumps of patches that you may have but please discuss (with the entire group) the posting of other files ∗before∗ posting them. This helps us to keep redundant information from showing up everywhere and also allows us to constantly improve the format and structure of the documentation. We talk about the HAWK-800 quite a bit but we also discuss and help owners of the original Poly-800 models. So don't be shy if you haven't got the HAWK-800.Yahoo! Groups Links
confidential and is for the exclusive use of the addressee. The person
who receives this message and who is not the addressee, one of his
employees or an agent entitled to hand it over to the addressee, is
informed that he may not use, disclose or reproduce the contents
thereof, and is kindly asked to notify the sender and delete the e-mail
immediately.