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Reference DAC Module - Discrete R-2R Sign Magnitude 24 bit 384 KHz

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#2,123
laptopav said:
I also follow up the posts from Paul: 1683 and 1684

but still no respond after +++

I am start to looking for old PC some where! 🙂
Click to expand...

The screen shot of ZTerm is showing junk in response. This is wrong!!!!
The text must be related to input, sampling rate and volume and should not be garbled.

Junk characters show the DAC is responding, but the encoding is wrong.
In the connection setup double check:

Flow control options are all off.
Double check:
Data Bits: 8
Parity: None
Stop Bits: 1

cheers
Paul
 
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#2,124
But this is, I presume, also coming from the DAC (marked with red)

If so the RX/TX cannot be wrong connected.
 

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#2,128
@soekris Any idea when we can have firmware enabled access the isolated TTL serial lines? I'm wanting to be able to use an Ardiuno's TTL pins to update a 16x2 LCD display in my chassis with the current input/sample rate status. Right now it looks like I'm forced to use the RS232 non-isolated to obtain this information, and needlessly having to convert it to TTL levels.
 
#2,129
nusa said:
As Zterm works perfectly for me, I feel sorry for you and in tying to help I' going to ask a very basic and silly question: did you open Zterm first and switch on the Dac after?
Click to expand...

Thanks for sharing! I did open Zterm first and switch on DAC. Is it wrong? I did switch on DAC first and Zterm later, still no respond after +++

spzzzzkt said:
The screen shot of ZTerm is showing junk in response. This is wrong!!!!
The text must be related to input, sampling rate and volume and should not be garbled.

Junk characters show the DAC is responding, but the encoding is wrong.
In the connection setup double check:

Flow control options are all off.
Double check:
Data Bits: 8
Parity: None
Stop Bits: 1

cheers
Paul
Click to expand...

Thanks Paul, I already double double check already 🙂🙂, and more:
- transfer convert: Binary Data
- transfer option/Send protocol is XModem-1k, receive is XModem
- Modem Preferences: all blank, Dial timeout:15

spikestabber said:
Verify your baud rate, should be 115200.
Click to expand...

Yes, it is 115200! Double check 🙂
 
#2,130
Can you kindly post a picture of your USB-RS232 converter? A common PL2303HX supports both TTL and RS232 voltages, depending on how the board is wired. Most of these cheap USB to serial adaptors that come with a bare set of pin headers including a 4th power wire are intended to be used with Arduino's, Rasberry Pi's, etc and only support TTL levels.

Of course this wouldn't be a problem if the TTL RX/TX ISO headers were enabled.
 
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#2,131
avr300 said:
But this is, I presume, also coming from the DAC (marked with red)

If so the RX/TX cannot be wrong connected.
Click to expand...

No, It just profile name from Zterm software

Dimdim said:
The junk text usualy means that your USB to serial adapter is not a real RS-232 adapter. It is probably outputting 0-5V instead of the "real" RS-232 levels. You should try some other adapter or an old PC with a real serial port.
Click to expand...

I just tried with my old laptop run winXP, not luck.

Looking for a PC with real RS232 seem very hard now! 🙂
 
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#2,132
spikestabber said:
Can you kindly post a picture of your USB-RS232 converter? A common PL2303HX supports both TTL and RS232 voltages, depending on how the board is wired. Most of these cheap USB to serial adaptors that come with a bare set of pin headers including a 4th power wire are intended to be used with Arduino's, Rasberry Pi's, etc and only support TTL levels.

Of course this wouldn't be a problem if the TTL RX/TX ISO headers were enabled.
Click to expand...

Sure! And yes it have 4th wire for Vcc but I not use it. I bought this one from USB to RS232 TTL UART PL2303HX Auto Converter USB to com Cable Adapter Module | eBay

I also able to check the exact name of chipset is PL-2303XA/HXA

update: spike, you are very right, this adapter support TTL (information from product page). Do you have any suggest on another brand name? Thanks!

update 2: this should work, I assume 🙂: http://www.ebay.com/itm/FT232RL-USB...45?pt=LH_DefaultDomain_77&hash=item1c3a754981 this allow us to change between TTL level to CMOS level or even any level if we could set a level target. Just the matter if this work on mac or not?
 

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#2,133
hi all, i want to build my first dac, and i want to capire if that dac ladder has a good sound, but i dont want read entire treadh and i want to apologize for this. is there someone that can tell me about the sound of this dac. thanks very much.

Best regard
Emilio
 
#2,134
laptopav said:
Sure! And yes it have 4th wire for Vcc but I not use it. I bought this one from USB to RS232 TTL UART PL2303HX Auto Converter USB to com Cable Adapter Module | eBay

I also able to check the exact name of chipset is PL-2303XA/HXA

update: spike, you are very right, this adapter support TTL (information from product page). Do you have any suggest on another brand name? Thanks!
Click to expand...

Any of the adaptors that have a standard 10 pin male RS232 port should work, such as: USB TO RS232 Serial Port 9 PIN DB9 Cable Serial COM Port Adapter Convertor Blue | eBay

Could also get away with using a TTL to RS232 converter as well. http://www.ebay.ca/itm/10Pcs-Serial...278?pt=LH_DefaultDomain_0&hash=item1c3fc3e5ee
 
#2,136
leon77 said:
hi all, i want to build my first dac, and i want to capire if that dac ladder has a good sound, but i dont want read entire treadh and i want to apologize for this. is there someone that can tell me about the sound of this dac. thanks very much.

Best regard
Emilio
Click to expand...

Good. Better than my gustard x10 ess9018 dac, whatever that means. More detailed and cleaner, even though it has more harmonic distortion. The ability to load different filters is great, since.the basic sound of the dac seems to be pretty much there. Imho
 
#2,138
I am having trouble setting up Volumio i2s out on Rpi2. There is no support on the volumio site and the DAM isn't an option in the dropdown i2s settings. The "generic" setting doesn't connect. My wires are connected to the DAM properly and I am at a dead end searching forums, can anyone here lend a hand?
 
#2,139
robertrowett said:
I am having trouble setting up Volumio i2s out on Rpi2. There is no support on the volumio site and the DAM isn't an option in the dropdown i2s settings. The "generic" setting doesn't connect. My wires are connected to the DAM properly and I am at a dead end searching forums, can anyone here lend a hand?
Click to expand...


Have u tried a Rpi a/b ? Rpi 2 is 2 new. Just my two cents.


Sent from my iPhone using Tapatalk
 
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