Hello everybody, I'm a new member.
I'm working on a project of an interface for the pga2310 volume control IC.
The interface can also control an input select board equipped with relays
or analog switches, and is remotely controllable with an RC5 type RC.
I think it could be used as a starting point for various preamp projects.
It's intended for the diyers that aren't familiar with microcontrollers.
Here is a VIDEO of my first prototype.
I'm planning to make a kit if someone is interested.
I attach some image of my idea, it's a compact module of 120x40mm (4.7x1.6'').
Comments and suggestions are welcome.
Bye.
I'm working on a project of an interface for the pga2310 volume control IC.
The interface can also control an input select board equipped with relays
or analog switches, and is remotely controllable with an RC5 type RC.
I think it could be used as a starting point for various preamp projects.
It's intended for the diyers that aren't familiar with microcontrollers.
Here is a VIDEO of my first prototype.
I'm planning to make a kit if someone is interested.
I attach some image of my idea, it's a compact module of 120x40mm (4.7x1.6'').
Comments and suggestions are welcome.
Bye.
Attachments
Not bad, but I would use PIC18.It has more memory and is easier to program.
What if you need to upgrade your soft. Is there any possibility for this?
And can you tell what compiler you used.
What if you need to upgrade your soft. Is there any possibility for this?
And can you tell what compiler you used.
I had some free sample of pic 16F1934 from Microchip and
I wanted to test them..
These are enhanced mid-range devices whit some nice features.
The software uses <3/4 of program memory and < 1/3 of ram,
so I think there is room for future additions.
However it's certainly possible to use a pic18.
There will be an ICSP connector for fast software update.
The program is wrote in assembly using MPLAB IDE.
You must be very good in in assembler if you can write such a complex program.
Is there any chance that you will release the source code?
Is there any chance that you will release the source code?
Not for the moment, cause I'd like to try to sell the kit,
or at least the programmed microcontroller.
If my business will fail (I'm not a business talent 🙁) I'll release the software.
Be patient.
Bye.
How does it compare to say, a stepped pot?
Other than that it looks good! I think I would rearrange the selection so that source selection comes before balance.
Fran
Other than that it looks good! I think I would rearrange the selection so that source selection comes before balance.
Fran
I'm not a great audiophile, so I will not enter in this debate.
On the paper the pga2310 looks very good (and pga2311 has still lower distortion).
I think the price is very low compared to that of a good quality stepped pot.
In addition it has the source select feature and is remotely controllable
(maybe there are motorized stepped pot, I don't know).
This is very easy, I'll think on it.
Bye.
I think that right now time is not good for business, global war on terrorism is gone too far and lasts too long. People have no money and life is expensive.They have problems to get enough money for food, so it's very difficult to sell something what they don't really need.
Well, I don't know. You can buy a rebuilt kit on eBay for ~€50 or so. Having said that, it would be nice to have access to have custom names etc etc.
I must look at these chips again. It would be very nice indeed to have remote control on a preamp, plus all the other functions. But the killer question for many I think would be "does it sound as good as a gigawork stepped pot from ebay?".
If a comparison can be done, or info found already out there then that would help sales I'm sure.
Fran
I must look at these chips again. It would be very nice indeed to have remote control on a preamp, plus all the other functions. But the killer question for many I think would be "does it sound as good as a gigawork stepped pot from ebay?".
If a comparison can be done, or info found already out there then that would help sales I'm sure.
Fran
My project pertain only to the control section.
My intent was to create an easy way to provide the SPI signal
(3 wire + gnd) for the pga2310 logic and 8 (or more) TTL signals
to drive the input select board (my first idea was to use SPI also for
input selection, but I tought it's simpler this way).
In addition there is an on/off
signal to switch the audio part from remote control.
The audio part is left to creativity.
I think the quality depend greatly on the design.
The pga2310 require a low source impedance, so an input buffer
is mandatory. The minimum load is 600 Ohm, so an output buffer
may be needed too.
Surely one pro of this chip over the stepped attenuator is versatility.
It provide attenuation as well as amplification (-95.5 <-> +31.5 dB)
in 255 (0.5 dB) steps. Probably you don't need such resolution,
but the steps are easily modificable in software, or be user selectable.
It's more reliable than mechanical switch, the more fragile part is
the rotary encoder (that costs < 1$).
That said, I don't want to cause an holy war.
Bye.
My intent was to create an easy way to provide the SPI signal
(3 wire + gnd) for the pga2310 logic and 8 (or more) TTL signals
to drive the input select board (my first idea was to use SPI also for
input selection, but I tought it's simpler this way).
In addition there is an on/off
signal to switch the audio part from remote control.
The audio part is left to creativity.
I think the quality depend greatly on the design.
The pga2310 require a low source impedance, so an input buffer
is mandatory. The minimum load is 600 Ohm, so an output buffer
may be needed too.
Surely one pro of this chip over the stepped attenuator is versatility.
It provide attenuation as well as amplification (-95.5 <-> +31.5 dB)
in 255 (0.5 dB) steps. Probably you don't need such resolution,
but the steps are easily modificable in software, or be user selectable.
It's more reliable than mechanical switch, the more fragile part is
the rotary encoder (that costs < 1$).
That said, I don't want to cause an holy war.
Bye.
There is already a recent open source PGA project on the forum......
http://www.diyaudio.com/forums/analog-line-level/207430-pga2310-line-preamplifier-free-software.html
Existing PGA23xx remote kits are already widely available. How would yours be different enough to attract buyers?
http://www.diyaudio.com/forums/analog-line-level/207430-pga2310-line-preamplifier-free-software.html
Existing PGA23xx remote kits are already widely available. How would yours be different enough to attract buyers?
I missed it, very interesting.
Nothing indeed, probably I like it 'cause I've designed it following my taste.
I tougth my idea was original.
I apologize for the intrusion.
This is interesting project.I like this possibility to change the input names.
Can you explane the algorithm for this?
Can you explane the algorithm for this?
This is already been done by Linuxworks with his LCDuino:
AMB Laboratories DIY Audio • View topic - BurrBrown PGA2311
Link LCduino:
The LCDuino-1 Display I/O Processor
Don't give up! Those others threads may save you some time and help with decision for your own design
Fran
Fran
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