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"Reference" TDA1541A DAC with I2S-BUS architecture
"Reference" TDA1541A DAC with I2S-BUS architecture
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Old 13th January 2018, 09:46 PM   #1581
aguaazul is offline aguaazul
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"Reference" TDA1541A DAC with I2S-BUS architecture
TIC,
Oliver sent me the schematic for the UHS Buffer.
Also the 74HC02 Schematic so you can make your own.

UHS Buffer - Google Photos
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Old 14th January 2018, 01:22 AM   #1582
wlowes is offline wlowes  Canada
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The key is... WaveIO outputs I2S, and Red Baron expects to receive I2S. So make the connection and you are in business. The options for connecting are with U.FL cables (preferred) or by unshielded wires. Toslink is a competing interface to I2S. BNC is a type of connector that would compete with U.FL.
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Old 14th January 2018, 10:01 AM   #1583
Ryelands is offline Ryelands  United Kingdom
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Quote:
Originally Posted by aguaazul View Post
Also the 74HC02 Schematic so you can make your own.
I have a couple of those 74HCO2 buffer boards that I bought way back when but never got round to using. :<(

I'll not be using them now - if anyone wants one, PM me. Yours for the price of the stamp.

Dave

PS: wlowes - good to see you around.
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Old 31st January 2018, 08:50 AM   #1584
TIC37 is offline TIC37  Sweden
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I have started building the Red Baron and so far so good.

Rectification, Done!
Shunt board, Done!
Red Baron, done and the rest is ongoing (waiting for components).

I have on the shunt board -15.30 volts, -5.501 volts and +5.502 volts stable after 10-15 minutes. I had to change one of the heatsinks for the 15 volt rail cause it got really hot (toutchable for 3-5 sek) but it turned out that the sinks that I recieved in the package (bought from another earlier buyer) was only 40 mm high and luckely I had some 50 mm sinks laying around so now I am good.

Still missing the 3.3 volt line cause I am missing parts but I was wondering if there are substitutional part for the DX45H8 that was recommended in the rebuild of a 5 volt line?? I have problem locating this DX45H8 locally and was thinking that there must be substitutes?

I connected the Red Baron board for the first time last night and measured some voltages on the board to confirm function, I had, without the TDA chip installed and no load, on pins;

15 - 5.529 volt
16 - 5.527 volt
17 - -5.521 volt
26 - 15.28 volt
27 - 15.28 volt
28 - 15.29 volt

just wonder if someone can confirm the values here.

I also have a question about the DC Reference board, it says 470 uF caps but would it be possible to use 330 uF Nichicon Muse here (have them home and don't want to spend money if not needed)??

Finally, I am setting up a Salas Reflector D for 5 volt for the Twisted Pear WM8804 and Waveio boards, would it be sufficient with 4700 uF cap instead of 10000-22000uF that is recomended from Salas or is it tooooo small a cap??
Is there anyone who know what current draw I should expect from the WM8804?
Information from Cirrus Logic just state that the chip itself draw 2.6-3.7 mA but it doesn't say anything at TP site about total use??
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Old 7th February 2018, 12:43 AM   #1585
kp93300 is offline kp93300  Malaysia
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Need help regarding the Tube I zator board.
What and where to measure with the adjustment of the trimmer on the board?
Thanks
Kp93300
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Old 7th February 2018, 05:12 AM   #1586
dvb projekt is offline dvb projekt  Germany
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&quot;Reference&quot; TDA1541A DAC with I2S-BUS architecture
Quote:
Originally Posted by kp93300 View Post
Need help regarding the Tube I zator board.
What and where to measure with the adjustment of the trimmer on the board?
Thanks
Kp93300
Wrong thread... Anyway, all measure points are painted on the PCB and will be measured to GND.

Tube-I-zator Professional PCB

Click the image to open in full size.

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Old 27th February 2018, 08:21 PM   #1587
aguaazul is offline aguaazul
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&quot;Reference&quot; TDA1541A DAC with I2S-BUS architecture
Everything is built, starting to put it all together & testing.

I have a spare Shunt regulator Module for add. +5V line. I want to use it for powering up a WaveIO board. I have a + / - Power Supply built so what I am looking for is the formula / resistor value for R1 to get 500mA.

As it was originally set up with a 10 ohm Resistor to get 200mA. Does the equation: CCS(.200A)=x/10 in Ohm where apply here? Where x=2. If so 500mA CCS would be: .5= 2v / 4 Ohms. Could someone please check my math against what they have done?

Oliver, can I safely set my current overhead to 600mA with the spare Shunt regulator Module for add. +5V? My calculations puts that around 3.3R and I have a 3R3 KIWAME 5W in stock.

Thanks,

Aguaazul
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Old 6th March 2018, 02:44 AM   #1588
dvb projekt is offline dvb projekt  Germany
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&quot;Reference&quot; TDA1541A DAC with I2S-BUS architecture
Quote:
Originally Posted by aguaazul View Post
Everything is built, starting to put it all together & testing.

I have a spare Shunt regulator Module for add. +5V line. I want to use it for powering up a WaveIO board. I have a + / - Power Supply built so what I am looking for is the formula / resistor value for R1 to get 500mA.

As it was originally set up with a 10 ohm Resistor to get 200mA. Does the equation: CCS(.200A)=x/10 in Ohm where apply here? Where x=2. If so 500mA CCS would be: .5= 2v / 4 Ohms. Could someone please check my math against what they have done?

Oliver, can I safely set my current overhead to 600mA with the spare Shunt regulator Module for add. +5V? My calculations puts that around 3.3R and I have a 3R3 KIWAME 5W in stock.

Thanks,

Aguaazul
Hi Aguaazul,

I= U/R so
2V/3.3R=0.6A...correct.

As Salas said, the reg. could go up to 1A. Please use a bigger heatsink!!!


Best,
Oliver
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Old 6th March 2018, 03:50 AM   #1589
aguaazul is offline aguaazul
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&quot;Reference&quot; TDA1541A DAC with I2S-BUS architecture
Thanks Oliver! Heatsink issue noted. Can heatsinks be stacked? Or is it better to get some bigger ones?

Aguaazul
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Old 4th April 2018, 01:29 AM   #1590
RustySpoons is offline RustySpoons  United Kingdom
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I read the files were lost in a HD crash, is there any chance that the PCB Fab might still have these files?
Sadly as the Red Baron is out of production is there an alternative board available anywhere?

I've got some TDA1541A's I want to play around with.
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