Build Thread for TPA BIII + Ian Async I2S FIFO + OPC NTD1 + Salas SSLV - Page 37 - diyAudio
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Old 21st December 2012, 09:13 PM   #361
DQ828 is offline DQ828  Australia
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Quote:
Originally Posted by Dimdim View Post
Btw, dear bigpandahk, I probably shouldn't be doing this to you, since you appear to have your hands full with the power supplies, but I have been experimenting with the Arduino Due as a controller and am pretty happy with the results.. The operation is now much snappier. Take a look at this comparison video that I made:

Arduino MEGA vs. Due - YouTube

You may notice that the startup is pretty much instantaneous (ok, no one cares, but still..), the volume control is extremely fast and the input changes are close to instantaneous as well. I'll be sticking with the Due for my implementation. I only have to find out why the rotary encoder is no longer working (it probably has something to do with the way the Due handles interrupts.. I'll look into it).
Very nice, very tempting.

How did you connect the Mega & the Due to the screen without the shield, when I tried that it didn't. are you just wiring direct from the screen to the board, a picture would be great
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Old 21st December 2012, 10:01 PM   #362
Dimdim is offline Dimdim  Greece
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I made this adapter for the Mega:

Click the image to open in full size.

It is just a bunch of 10K resistors connected to all of the signal pins.

In case of the Due, it is even simpler, since it uses 3.3V logic so no resistors are necessary:

Click the image to open in full size.
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Old 21st December 2012, 11:04 PM   #363
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Quote:
Originally Posted by Dimdim View Post
I made this adapter for the Mega:

Click the image to open in full size.

It is just a bunch of 10K resistors connected to all of the signal pins.

In case of the Due, it is even simpler, since it uses 3.3V logic so no resistors are necessary:

Click the image to open in full size.
Can't see the pictures.
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Old 22nd December 2012, 12:22 AM   #364
Dimdim is offline Dimdim  Greece
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That's strange.. let me try this again:

Click the image to open in full size.

Click the image to open in full size.
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Old 22nd December 2012, 06:57 AM   #365
DQ828 is offline DQ828  Australia
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Quote:
Originally Posted by Dimdim View Post
That's strange.. let me try this again:
Ah, that's where I went wrong, no 10K resistors.

In the end I soldered pins onto the back of the Mega so I could get access to the other pins, it has worked out pretty well, certainly cut down on the wires.
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Old 30th December 2012, 07:11 AM   #366
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finally fixed the damaged 4700 PCB and built two 5V LDO with Ian's boards.

I also bought some PCB from Ti which suitable for most SOT223LDO, will use this to power the relay boards.

Next is to modify the Amanero using 4700LDO and re-sync the clock.

Dimdim, any finding on the Arduino Due interrupt?
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Old 30th December 2012, 11:23 PM   #367
Dimdim is offline Dimdim  Greece
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I'm afraid that I haven't had much time to thoroughly troubleshoot the interrupt issue.

I have noticed that the Due requires a slightly different syntax of the attachInterrupt function (since it is capable of attaching an interrupt to any of its pins) and have made the necessary changes in the code, but it hasn't solved the problem. I will have to perform more extensive testing.
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Old 31st December 2012, 03:47 PM   #368
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Quote:
Originally Posted by Dimdim View Post
I'm afraid that I haven't had much time to thoroughly troubleshoot the interrupt issue.

I have noticed that the Due requires a slightly different syntax of the attachInterrupt function (since it is capable of attaching an interrupt to any of its pins) and have made the necessary changes in the code, but it hasn't solved the problem. I will have to perform more extensive testing.
Thanks Dimdim for your reply, waiting for your good news.

I modified the Amanero today but don't have time to test.

Happy new year to all diyaudio members.
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Old 31st December 2012, 06:40 PM   #369
glt is offline glt  United States
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Very nice! You are very good soldering those tiny components...
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Old 1st January 2013, 12:12 AM   #370
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Very nice! You are very good soldering those tiny components...
Thanks glt

Without the clear description in your blog, I wouldn't know how to implement the mod.
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