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Old 4th June 2010, 09:55 AM   #1
Jempie is offline Jempie  Indonesia
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Default volume remote control module with PGA 2311

hi

I have bought by ebay a volume remote control module with PGA 2311
the problem is that the volume starts every time with the volume level of
-46dB and does not remember the volume setting. Also the lowest volume is
-96 dB and you can still hear some sound it must be zero.

a have ask the seller to change the software of setting but the don't give
any correct awnsers. Is there a way to change the HEX file i

Crystal PGA2311 Volume remote control preamplifier kit - eBay (item 200471618932 end time Jun-10-10 20:06:21 PDT)

regards,
Harry
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Old 7th June 2010, 09:34 AM   #2
Jempie is offline Jempie  Indonesia
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a have ask the seller to change the software of setting but the don't give
any correct awnsers. Is there a way to change the HEX file i
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Old 7th June 2010, 09:56 AM   #3
danzup is offline danzup  Romania
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Hello Jempie , if you are wiling to change the mc with an atmega16 and do some minor changes on your pcb then I can write to you a firmware in my spare time that are complied with your request .
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Old 7th June 2010, 11:21 AM   #4
Jempie is offline Jempie  Indonesia
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Dear danzup,

yes please. many thanks..
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Old 8th January 2011, 09:01 PM   #5
ads2 is offline ads2  France
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Do someone know if this 2x16 LCD display could be replaced by a VFD one ?
Regards
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Old 10th January 2011, 01:56 PM   #6
Jempie is offline Jempie  Indonesia
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Hi Danzup, did you already had the time to change the volume controle module
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Old 28th January 2011, 03:37 AM   #7
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fwiw, I also bought one of these (I think its the same one; it has 3 PGA DIP16 chips on it).

NO schematic came, not even in email. very poor form ;(

I'm not even sure if I want to build this, to be honest. the pcb layout is horrible, no ground plane, no recommended bypassing that the vendors (cirrus and ti) recommend. no firmware code, no nothing, really. pretty disapointing.

I also plan to ignore the onboard chip and firmware and use my own. I had a PGA chip going once on some firmware I wrote for the arduino and I might port my code over to this kind of platform eventually.

everytime I order from ebay/china, I get less than I expected. WHY do they not included pcb layouts (at least) and schematics? I know that asking for code is 'asking too much' from ebay vendors but, wow, my 'kit' came with ZERO docs ...
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Old 28th January 2011, 03:39 AM   #8
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Quote:
Originally Posted by ads2 View Post
Do someone know if this 2x16 LCD display could be replaced by a VFD one ?
Regards
vfd is not 5v based, is it?

the lcd is hd44780 (hitachi) standard. you'd have to find a VFD that speaks that same 14/16 pin (14pin really since the top 2 on the 16 is the backlight and you DON'T USE THAT for vfd) protocol as the hitachi.
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Old 28th January 2011, 10:02 AM   #9
danzup is offline danzup  Romania
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Quote:
Originally Posted by Jempie View Post
Hi Danzup, did you already had the time to change the volume controle module
Not yet , sorry I am a busy for now and the next month with personal business !
But in the future I will help you as I promised and all from this forum with an explained firmware , as everyone to change that for their own purpose ...
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Old 28th January 2011, 10:03 AM   #10
danzup is offline danzup  Romania
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Quote:
Originally Posted by ads2 View Post
Do someone know if this 2x16 LCD display could be replaced by a VFD one ?
Regards
I have try some Noritake VFD (some 2 ... 3 years ago) and work as charmed without need to change anything because that type have an HD like interface build in .
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