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Very confused about Buffalo II + Volumite
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DSlayerZX  
#1 Posted : Thursday, July 15, 2010 1:10:37 AM(UTC)
DSlayerZX

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Hello,

I have a question, on the newer wiring diagram, it mentioned that by using the Volumite on Buffalo II, i need to get the on-board reg omitted and install a jumper shown in the volumite manual.

But I have already read the manual, by "get the on-board reg omitted, does it mean that I will need to unplug the eight pin processor next to the I2C interface?
Also for the jumper, after reading the manual multiple times, I think I should install the jumper between the two ADDR point, is this correct?


Also, Russ, any ETA on the 15VA transformer?

Got the package today, completed soldering and put parts together today (still need a case)

can't wait to listen to the final product

any information about the volumite would be helpful, thank you



============================================================================================

ok, more confusion form this thread

http://www.twistedpearau....aspx?g=posts&t=1069

Brian said "You should remove the vreg on the Volumite and use a jumper between pins 1 and 3 as outlined in the Volumite manual."

Then Russ said

"The VREG on the volumite cannot be in place if you are deriving the supply voltage from the BUFII. :)"


My wiring diagram is basically exactly the same as the simple wiring diagram, so by using Buffalo Buffalo as a power source, the reg on volumite need to be remove as well?


Vreg is the control chip that is on both Volumtie and Buffalo II (next to the IRC) right?

If that is right, then do I remove both?
Because removing both control chip really doesn't sound right...


Also, is there ... hidden manual for the volumite?
because when i open the volumite manual, it's only a one page manual that did not, no where, explain where I should put the jumpers @_@

any help would be appreciated thank you

Edited by user Thursday, July 15, 2010 3:09:28 AM(UTC)  | Reason: Not specified
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PressPlay  
#2 Posted : Thursday, July 15, 2010 3:51:36 AM(UTC)
PressPlay

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You have two options for powering the Volumite - if you are using the VCC from the DAC (the obvious choice) you don't install or 'need to remove' the Volumites on board regulator (the little 3 legged reg next to the pot) and install the jumper.
Alternatively if you wish to power the volumite directly via your 5/6v dc power supply you just need to connect the VCC to the positive + output terminal from your Placid or LCDPS and use the Volumites on board reg.

Remember to remove the Buffalo DAC's onboard controller IC when using the Volumite because the Volumites IC takes over.

Edited by user Thursday, July 15, 2010 3:52:44 AM(UTC)  | Reason: Not specified
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Brian Donegan  
#3 Posted : Thursday, July 15, 2010 5:25:19 AM(UTC)
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PressPlay is correct, and here is a little more clearification...

The 8-pin ICs are firmware chips, not voltage regulators. The voltage regulator on the Volumite is the three-pin device (TO-92).

For use with Buffalo, your Volumite should look like this (taken from my Buffalo testing rig):

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Brian Donegan  
#4 Posted : Thursday, July 15, 2010 5:27:41 AM(UTC)
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[Continued...]

We highly recommend you use the Buffalo to power the Volumite, as it will prevent the possibility of startup timing issues.

Since the Buffalo I2C header outputs 3.3V, there is no need to regulate the voltage on the Volumite, so jumper the two outer pads for the vreg (see above picture). Be sure the jumper does not touch the center hole.

Then connect the Volumite to the I2C header on the Buffalo (pin names match between the two devices):

Edited by user Thursday, July 15, 2010 5:32:16 AM(UTC)  | Reason: Not specified

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Brian Donegan  
#5 Posted : Thursday, July 15, 2010 5:29:18 AM(UTC)
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[Continued...]

For the Buffalo-II and Buffalo32s, the firmware on the Volumite replaces the firmware on the Buffalo board, so gently remove the firmware chip from the Buffalo (see above picture).

Edited by user Thursday, July 15, 2010 5:32:49 AM(UTC)  | Reason: Not specified
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LeonvB  
#6 Posted : Thursday, July 15, 2010 10:34:54 AM(UTC)
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How would that work for a dual mono setup?
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DSlayerZX  
#7 Posted : Thursday, July 15, 2010 10:52:49 AM(UTC)
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Alright! thank you for the fast and very very helpful explanation (with pics too O.O)

really appreciate your help Applause

(so.. i assume the jumper I put onto the ADDR is not necessary)

Now all I need to do is wait for the parts and go to Lowes to buy some case material XD

Edited by user Thursday, July 15, 2010 10:57:59 AM(UTC)  | Reason: Not specified
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Brian Donegan  
#8 Posted : Thursday, July 15, 2010 12:29:38 PM(UTC)
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For dual mono (two DAC boards), run all four wires to one DAC, and run just the SDA and SDL lines to the second DAC.

You also need to do these two things:

One DAC needs to to be left, the other right. To accomplish this, you put a jumper on the ADDR pads on one DAC (I think Left, but I need to check). This gives one DAC a different I2C address, so the Volumite can communicate with each one separately.

Then you need to tell the Volumite that you want to to control two DACs in dual mono. To do this, you add a jumper between the PB3 terminal and the ground terminal on the Volumite.

Edited by user Thursday, July 15, 2010 12:30:52 PM(UTC)  | Reason: Not specified
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LeonvB  
#9 Posted : Thursday, July 15, 2010 2:33:12 PM(UTC)
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Thanks, that's perfectly clear. It's not mentioned in the current manual, in fact it contradicts parts of it ('PB3 not used'). I guess we could use a bit of a "best practices collection" for the common setups. As far as one could call a DIY DAC a common setup of course ;)
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