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Maya R2R Advanced Volume controller

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#281
@tvicol
What is the controller build upon ?
Do I need the Maya relay board(s) in addition to the VoICB board(s) ?
2.xA just for that volume controller is a lot.... but i might be missing some information here after rereading your description.
I got the symmetrical SMPS arrangement (+15.5VDC) - 0 - (-15.5VDC) / 1A followed by those +/- 12VDC / max 1A Hypex regulators feeding the BPBP.
I could add another one of those Meanwell SMPS (RS15/RS25/RS35 etc) if the voltage is one of the standard ones offered. This would be feeding just the controller and its addons without being in direct connection with the audio signal, if I got it right.

I did have a look at your website (and your webshop) already, but couldn't find anything about the specific needs for that combination Maya / Putzey BPBP, only a description and offer for your own (complete) preamp.
Did I miss something ?
 
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#283
burkm said:
@tvicol
What is the controller build upon ?
Do I need the Maya relay board(s) in addition to the VoICB board(s) ?
2.xA just for that volume controller is a lot.... but i might be missing some information here after rereading your description.
I got the symmetrical SMPS arrangement (+15.5VDC) - 0 - (-15.5VDC) / 1A followed by those +/- 12VDC / max 1A Hypex regulators feeding the BPBP.
I could add another one of those Meanwell SMPS (RS15/RS25/RS35 etc) if the voltage is one of the standard ones offered. This would be feeding just the controller and its addons without being in direct connection with the audio signal, if I got it right.

I did have a look at your website (and your webshop) already, but couldn't find anything about the specific needs for that combination Maya / Putzey BPBP, only a description and offer for your own (complete) preamp.
Did I miss something ?
Click to expand...


Maya is based on a 32K atmel microcontroller, but have nothing to do with arduino. Maya is programmed in Bascom.
For BPBP you do not need relay boards, therefore 500mA are enough to drive bluetooth, infrared and oled display.

Maya for BPBP+VoICB-pcb will be available, at a special discount, in the last day of March for 24h. Is a one time offer.

Regards,
Tibi
 
#284
OK, I missed that one and thought of the Arduino platform without realizing this, because many volume controllers - to my knowledge - are based upon this controller.

PS.: Just checked the Meanwell PSU specs.
6 - 9VDC is outside of the range offered, because either 5VDC or 12VDC are offered as standard, the provided worst case adjustment range not covering the area needed. It's either 5.5VDC upper adjustment limit for the 5VDC version, but might be getting above that in a typical sample, or lower limit 10.75VDC for the 12VDC version, which might go even lower in a typical production sample too (not guranteed though).
I will check their "Report" section for "typical" specs.
 
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#286
Just checked the Meanwell "Report" section for typical specs.
The RS15-5 (VDC) version is stated with an upper value of 5.59 VDC, the RS15-12 (VDC) version is stated with a lower value of 9.32 VDC. Both are not covering the 6 - 9 VDC window. Will probably have to look elsewhere then (or another model) for a SMPS which fits...
 
#288
@tvicol

I asked for the PCB sizes which are needed (and how many of those if more than one) for the BPBP vol control and the corresponding height, so I can evaluate the case size for the whole setup. Could you please provide those ?

Thank you in advance.
 
#290
burkm said:
Just checked the Meanwell "Report" section for typical specs.
The RS15-5 (VDC) version is stated with an upper value of 5.59 VDC, the RS15-12 (VDC) version is stated with a lower value of 9.32 VDC. Both are not covering the 6 - 9 VDC window. Will probably have to look elsewhere then (or another model) for a SMPS which fits...
Click to expand...

Sorry, I was not clear.
Maya have it's own rectification and regulation with a classic 7805, therefore you need min 6Vac and max 9Vac at min ~500mA
Min. 6Vac in order to get over 8Vdc after regulation, otherwise 7805 will not regulate at all.
Max. 9Vac in order to keep power dissipated by 7805 low.

If your smps deliver 5Vdc, than you may feed Maya directly after 7805 regulator.

Regards,
Tibi
 
#291
burkm said:
@tvicol

I asked for the PCB sizes which are needed (and how many of those if more than one) for the BPBP vol control and the corresponding height, so I can evaluate the case size for the whole setup. Could you please provide those ?

Thank you in advance.
Click to expand...

PCB sizes are on the Maya page vicol audio : MAYA - your ultimate volume-controller If you scroll down, you see several pdf documents.
Direct link is here http://vicol-audio.ro/img/maya/Dimensions.PDF
In the PDF each module is numbered from 1 to 6. Only modules 1, 3 and 5 are used in Maya + VoICB fpr BPBP. Dimensions are in mm.

Here is a detailed explanation with pictures:
- Module 1 which is main board with microcontoller, oled display, bluetooth, regulation and interfaces
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.


- Module 3 is optical rotary encoder and temperature sensors
- Module 5 are pushbuttons
An externally hosted image should be here but it was not working when we last tested it.


Regards,
Tibi
 
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#294
tvicol said:
Sorry, I was not clear.
Maya have it's own rectification and regulation with a classic 7805, therefore you need min 6Vac and max 9Vac at min ~500mA
Min. 6Vac in order to get over 8Vdc after regulation, otherwise 7805 will not regulate at all.
Max. 9Vac in order to keep power dissipated by 7805 low.

If your smps deliver 5Vdc, than you may feed Maya directly after 7805 regulator.

Regards,
Tibi
Click to expand...


Hi Tibi,

Thanks for those answers and pictures plus links.
Is there a kit version available or do I have to unsolder parts from an assembled version to fit my BPBP setup ?
Looking at what's offered on your side seems to be really "luxury".

My needs may be (a lot ?) less though 🙄 :shy:
Stepped gain control for two channels (feedback path) and switching between those two inputs the BPBP offers as standard incl. remote control for those features.

Up to that point my BPBPs have cost me about EUR 110 (60 (pre-assembled PCB + Hypex regs) + 30 (additional through hole components) + 20 (2x SMPS)) per unit without parts cost for case, linear pot, input switch, power connection between SMPSs and BPBP PCB, fuse holder, IEC power inlet. This may add up to another EUR 100, which covers an estimated EUR 30 for a high quality 10k linear 2-channel pot plus input switch.

Is there an estimate already what the Maya volume controller for BPBP will cost during your sale ? I don't want to grow those expenses out of proportion just for that volume controller... 😉
 
#297
Just keep reminding yourself that the Maya is a small price increment over a good stepped attenuator and still one of the least expensive remote solutions out there. That and if the BPBP is as good as claimed, it will likely be in your system for a long time, so its an investment.

Or you can just attribute the cost to mission creep. It started out as an inexpensive preamp and you just added this little thing and that one until it got out of control. 😉
 
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#299
Hi Tibi,

Is there an option to use a separate vol control for the left and right channel? My room room tends to the right channel louder hence the need for a separate vol control for both channels. If it can, pls put me on the list on the next groupbuy.

Thanks
 
#300
tubo said:
Hi Tibi,

Is there an option to use a separate vol control for the left and right channel? My room room tends to the right channel louder hence the need for a separate vol control for both channels. If it can, pls put me on the list on the next groupbuy.

Thanks
Click to expand...

There is no option to control left or right volume. The aim of Maya is to keep perfect level reproduction.

It is a 24h discount sale not GB.

Regards,
Tibi
 
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