MK2 Solution to select A/B drawbar sets via preset16 board

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rolandds
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MK2 Solution to select A/B drawbar sets via preset16 board

Beitragvon rolandds » 26. Mai 2016, 22:34

Solution to select A/B drawbar sets with an " old" HX3 MK2 board via the preset16 second preselections
Original not possible with MK2 boards, exept using extra toggle switches , or this add on print.

A_B Solution.jpg

happyfreddy
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Re: MK2 Solution to select A/B drawbar sets via preset16 board

Beitragvon happyfreddy » 27. Mai 2016, 00:42

Thank You for this nice idea rolandds !

some added informations to above Schematic from Rolandds

The preset 16 board must have a soldered IC U1 and had to be connected to HX3 board by PL 4
The connection to PL 43 on drawbarboards must happen on those drawbarboards with mounted IC´s 74HC4053

The reason why to do it in this way is simple:
On old MK 2 boards the ANALOG INPUT plugs for drawbars are direct connected between pin 15 and 16 ( 3,3 Volt ).
No way to separate them !
On new boards ( mk 4 ) pin 15 has a new function : switching A/B selector for drawbarsets
On old Mk2 board this function is not implemented in layout design.
The relevant FPGA pin on Mk 2 boards is not connected with the analog input plugs pin 15
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rolandds
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Re: MK2 Solution to select A/B drawbar sets via preset16 board

Beitragvon rolandds » 27. Mai 2016, 07:24

Thanks happyfreddy to make the important additional notation about the PL4 connector to be used to connect preset16 board to HX3 MK2

But also important:
On the Drawbar9 mpx print is a PL46 with the notation "TO MK2 or SET B" .
Do not use that.
Instead use the PL45 ( To to MK3 ) to connect to Analog A and B of the HX3 MK2 or this system doesn't' work .

If you do so , you get the same result as on the MK4 board.
You can switch A/B drawbars on an MK2 with the first and second preset16 knobs ( upper and lower )

Best Regards
Roland De Schutter

happyfreddy
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Re: MK2 Solution to select A/B drawbar sets via preset16 board

Beitragvon happyfreddy » 27. Mai 2016, 10:39

@rolandds

The information You urged
"On the Drawbar9 mpx print is a PL46 with the notation "TO MK2 or SET B" . "
is correct
Normally with MK2 board the old preset 12 board or Preset 24 board was used.
These old boards contained the switching IC´s 4053 .

The new preset 12 board is missing those IC´s because they are now integrated directly on drawbar boards
For powersupply on drawbarboards is 3,3 volt they must be 74HC4053 types
Powersupply on old presetboards is 5 volt , therefore normal 4053 IC´s are used

HX3 MK 2 boards have normal no possibilty to switch a double set of drawbars because of missing connection FPGA - pin 15 Analog inputs.
For drawbarboards can be used in any case/configuration the information "or Set B" is also correct.

The problem in Your case occured by using old MK2 board in combination with new drawbar boards with mounted switching ICs 74HC4053
Hammond H 112 auf Säulen
Wersi Spectra auf Chromsäulen (+ HX 3 im Bau)
Wersi Spectra im Prisma Gehäuse
Leslie 770
HX 3 B 3 look (mk 4 )
HX 2 auf Chromsäulen (mk 1)
HX 1 Labormuster von 2010 mit Röhrenvorstufe
WERSI HELIOS W2TV spezial + HX 3 (im Bau)

rolandds
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Re: MK2 Solution to select A/B drawbar sets via preset16 board

Beitragvon rolandds » 27. Mai 2016, 10:44

I know , but that's what is delivered now...and i didn't want use old version boards.
Maybe in the future, if i would buy a new version of the HX3 board,
then can I start again buying drawbars etc.

This is the solution to use the new drawbar9 mpx sets on an "old" HX3 MK2 board.

HX3 MK2 - B3 look still under construction.
SONY Home Theater -SL5 as speakerset
Zuletzt geändert von rolandds am 27. Mai 2016, 18:20, insgesamt 10-mal geändert.

rolandds
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Prototype board

Beitragvon rolandds » 27. Mai 2016, 10:46

prototype.jpg
Zuletzt geändert von rolandds am 27. Mai 2016, 22:49, insgesamt 1-mal geändert.

rolandds
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Re: MK2 Solution to select A/B drawbar sets via preset16 board

Beitragvon rolandds » 27. Mai 2016, 10:55

Implementation in MK2 organ
WIRING DIAGRAM.jpg

happyfreddy
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Re: MK2 Solution to select A/B drawbar sets via preset16 board

Beitragvon happyfreddy » 28. Jun 2016, 17:12

It´s a nice idea but You have some problems with correct switching ( and storing later )

I have made a pic of function of panel 16 board


Screenshot 2016-06-28 18.53.45.png
panel 16


It seems that the LED is lightning permanently but it isn´t so
Via PL 4 the panel is driven by I2C bus
The IC PCA9532 decodes the incoming data and switches on it´s output pins permanently
between "OUT" and " IN "
Out means to drive the LEDs ( output pins goes to GND )
IN means to read the switches ( output pin goes to VCC )
The frequency is like in a movie : more than 25 pics/second, so that Your eyes registrate a permanently light in LED.
If You use this signal to drive a switch ( 4066 ) to change the set of drawbar it also will change permantly between both sets.
The switching ICs on drawbar boards run with 3,3 Volt ; the panel 16 board runs with 5 volts.
So it is better to use the old Preset 12 board because on this board You have the IC 4011 connected as a RS FLIP FLOP which gets from PCA
9532 the "set " and "reset" signal from relevant presetswitches
Hammond H 112 auf Säulen
Wersi Spectra auf Chromsäulen (+ HX 3 im Bau)
Wersi Spectra im Prisma Gehäuse
Leslie 770
HX 3 B 3 look (mk 4 )
HX 2 auf Chromsäulen (mk 1)
HX 1 Labormuster von 2010 mit Röhrenvorstufe
WERSI HELIOS W2TV spezial + HX 3 (im Bau)

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Re: MK2 Solution to select A/B drawbar sets via preset16 board

Beitragvon bovist » 29. Jun 2016, 13:50

Well, that's not so simple. Roland, I think the problem is the switching sequence. Presets are changed when button is released, but the button contact will turn on your circuit first as well as the LED. So old preset gets the drawbar change, but not the new preset (even when it's a "live" preset). This may disturbe the HX3 event and preset handling.

I provided the internal drawbar switching signal on PL5 vibrato port pin 6 and 7 which are not used otherwise in firmware 3.925 for mk2. They will provide same select signals as on HX3 mk4 analog inputs. Firmware is online in Github now. See instructions here:

http://wiki.keyboardpartner.de/index.php?title=HX3_Board_Installation#Connecting_Drawbar_9.2F11.2F12_Boards
Gruß, Carsten aka bovist
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happyfreddy
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Re: MK2 Solution to select A/B drawbar sets via preset16 board

Beitragvon happyfreddy » 29. Jun 2016, 16:57

The old preset 12 board was and is the most efficient result in this case.
You will never have any problems and it also runs with newer drawbar boards.
You only have to connect each drawbar board separatly to the preset 12 board.
For two manuals You need two preset boards
Hammond H 112 auf Säulen
Wersi Spectra auf Chromsäulen (+ HX 3 im Bau)
Wersi Spectra im Prisma Gehäuse
Leslie 770
HX 3 B 3 look (mk 4 )
HX 2 auf Chromsäulen (mk 1)
HX 1 Labormuster von 2010 mit Röhrenvorstufe
WERSI HELIOS W2TV spezial + HX 3 (im Bau)


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