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ES9018K2M, ES9028Q2M, 9038Q2M DSD/I2S DAC HATs for Raspberry Pi
ES9018K2M, ES9028Q2M, 9038Q2M DSD/I2S DAC HATs for Raspberry Pi
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Old Yesterday, 10:18 PM   #501
iancanada is offline iancanada  Canada
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Join Date: Dec 2009
Location: Toronto
ES9018K2M, ES9028Q2M, 9038Q2M DSD/I2S DAC HATs for Raspberry Pi
Default LL1544A I/V stage

I built this LL1544A I/V stage on my "hole board". Much compact than the previous LL1674 transformer I/V, looks more suitable for RPi audio application.

It follows madds1's configuration.
ES9018K2M, ES9028Q2M, 9038Q2M DSD/I2S DAC HATs for Raspberry Pi

Please see the attached schematics for details.

Both LL1544A and LL1674 are amorphous core transformer and configured at same input/output ratio, hopefully it has similar sound quality as LL1674.

I'll get LL1544A I/V board compared with other I/V stage HAT very soon. I'll post update after I have test result. If it is promising, I'll design a true adapter PCB. I really like the size and the prices.


Click the image to open in full size.
LL1544aIV_1
by Ian, on Flickr

Ian
Attached Images
File Type: jpg LL1544aIV_2.jpg (290.0 KB, 118 views)
Attached Files
File Type: pdf LL1544A_IVstageSchematic.pdf (14.0 KB, 31 views)

Last edited by iancanada; Yesterday at 10:21 PM.
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Old Today, 07:46 AM   #502
EaZy is offline EaZy  France
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Join Date: Feb 2013
Location: Strasbourg
Quote:
Originally Posted by jonners View Post
@EaZy

You would be more likely to get help with your problem by asking on the Volumio Forum.
Thanks. I didn't get help there neither.
I finally switched to Moode, it works flawlessly.
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Old Today, 08:13 AM   #503
dutchdiyer is offline dutchdiyer
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Join Date: Jun 2017
Quote:
Originally Posted by iancanada View Post
I built this LL1544A I/V stage on my "hole board". Much compact than the previous LL1674 transformer I/V, looks more suitable for RPi audio application.

It follows madds1's configuration.
ES9018K2M, ES9028Q2M, 9038Q2M DSD/I2S DAC HATs for Raspberry Pi

Please see the attached schematics for details.

Both LL1544A and LL1674 are amorphous core transformer and configured at same input/output ratio, hopefully it has similar sound quality as LL1674.

I'll get LL1544A I/V board compared with other I/V stage HAT very soon. I'll post update after I have test result. If it is promising, I'll design a true adapter PCB. I really like the size and the prices.


Click the image to open in full size.
LL1544aIV_1
by Ian, on Flickr

Ian
Stunning picture 👍

Frank
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