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Old 3rd June 2013, 03:31 AM   #11
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Join Date: Jul 2011
Location: Prior Lake, MN
Default DIR9001 adapter to CS8412/14

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Originally Posted by kvaal View Post
No harm for late replys. I`m late myself. Hope you don`t bother about that.

Thank you for the link. I will consider this one. Which voltage is needed?
It runs on 5 VDC, just like a CS8412/14. There is a regulator on the board to go down to 3.3 VDC that the DIR9001 needs. It is plug and play for any CS8412/14. You can wire up a board from the CS8412 datasheet, pick up +5 VDC inside the player.
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Old 4th June 2013, 12:41 PM   #12
kvaal is offline kvaal  Norway
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I have seen designs of NOS TDA 1541a driven by only DIR 9001. What do you think of that.
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Old 4th June 2013, 04:34 PM   #13
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Default NOS TDA1541A

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Originally Posted by kvaal View Post
I have seen designs of NOS TDA 1541a driven by only DIR 9001. What do you think of that.
Hi kvaal, You can certainly go that way. I tried it a week ago. It didn't play for me. Silent.... I hope to try it again with a Red Baron NOS board. It now looks as if that is lost in the mail. I won't waste another $40 to try again. So maybe a Veroboard effort. NOS will have a Sine X/X issue. What that means is at high frequencies you will have fewer samples so there is a gradual roll above 15 Khz or so. Some people can't hear much above that so not much issue. You can also add a compensation inductor to get a flatter response to 20 Khz. An example of which can be seen in Pedja Rogic's Aya II dac. I think most people hate the SAA7220 digital filter. So my solution was to use the DIR9001 board I showed you can put out "2's complement, MSB first, right justified data". I run that into a NPC SM5814BP digital filter and that is putting out I2S to the 1541. Well worth the effort, simple adapter sits in the 7220 socket. The original thread however was to make a CD player into a dac. It is still worth considering your options.
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Old 4th June 2013, 04:41 PM   #14
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If you want to PM me with an email, I have a circuit I can share with you. Dave
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Old 4th June 2013, 08:49 PM   #15
kvaal is offline kvaal  Norway
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I`m a doubt by now. I have modded the buffer/filter on a Philips cdp, and one channel broke down. I believe the broken part is in the power support to the op-amp. It was a bit of smoke. I dont care too much about the broken player, but it has a TDA 1541a. Maybe I throw it away, after taking the TDA out, and make a dac of the TDA. I won`t need a digital input on the Rotel then.

The Red Baron looks interesting, but is out of stock. Anyway, it has dual layers, and I`m not fond of soldering these.

Maybe a veroboard solution. Seems interesting. Yes, it is interesting to see a circuit diagram. I`ll send a PM.
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