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Old 15th June 2019, 09:33 PM   #651
D3nsityD3nt is offline D3nsityD3nt  Italy
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Hermes-BBB/Botic cape for BeagleBone Black
Hello everyone.
I was working on my PS for the Cronus board. Constructing PI filter in configuration LCLC. I had first choke dying on me while powering up. It was 10VDC spike. At least what I could capture on my meter. After that no more sound. All seems to work though. I even reinstalled os on BBB to be sure is not the botic itself doing problems.

Before I do any new purchase I would need to know whether it is just board that failed, on maybe Rhea clocks. Did any of you had this kind of failure caused by overvoltage before? Or maybe some of you did reparations on the board. The board itself is not to coplicated.

Any advice apreciated.
Regards
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Old 16th June 2019, 02:10 AM   #652
BrianDonegan is offline BrianDonegan  United States
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Hermes-BBB/Botic cape for BeagleBone Black
Quote:
Originally Posted by D3nsityD3nt View Post
Hello everyone.
I was working on my PS for the Cronus board. Constructing PI filter in configuration LCLC. I had first choke dying on me while powering up. It was 10VDC spike. At least what I could capture on my meter. After that no more sound. All seems to work though. I even reinstalled os on BBB to be sure is not the botic itself doing problems.

Before I do any new purchase I would need to know whether it is just board that failed, on maybe Rhea clocks. Did any of you had this kind of failure caused by overvoltage before? Or maybe some of you did reparations on the board. The board itself is not to coplicated.

Any advice apreciated.
Regards
You really do not need anything special to power the Cronus, as the onboard ADM regulator powers everything on the chip and will dominate performance.
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Old 16th June 2019, 08:43 AM   #653
D3nsityD3nt is offline D3nsityD3nt  Italy
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Hermes-BBB/Botic cape for BeagleBone Black
From technical point of view yes. From timbre and sound performance no. Better ps better sound. I have done like 5 or 6 different and high quality ps to it. Before I have concluded that PI filter is the andswer to get the optimal performance. Didn't try the battery though. This will be next.
But for now the board is brocken.
Do youi think that onboard ADM regulator is fried?
Would that be IC5 position or IC3?
I'm still getting 3.4v reads on positive rails on all aluminium capacitors (C11, C12, C10) if that helps.

Last edited by D3nsityD3nt; 16th June 2019 at 08:50 AM.
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Old 16th June 2019, 09:57 AM   #654
D3nsityD3nt is offline D3nsityD3nt  Italy
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Hermes-BBB/Botic cape for BeagleBone Black
CORRECTION

ButI'm still getting 3.28v reads on positive rails on all aluminium capacitors (C11, C10) AND 5.2 (C12)

In addition IC5 reads:
on oposite side to the input of the ADM7150:
1st leg closest to C10 no read, (GND)
2nd leg 3.28V, (REF_SENSE)
3rd leg 3.28V, (REF)
4th leg 3.86V. (VOUT)
Legs on the input side:
1st leg closest to the C10 3.29V, (VREG)
2nd leg 3.29V (BYP)
3rd leg 5.19V input voltage, (EN)
4th leg 5.19V input voltage (VIN)
Is it working properly?
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Old 22nd July 2019, 01:30 PM   #655
Blitz is offline Blitz  Germany
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Originally Posted by ppy View Post
The numbering of Hermes contacts and my DSC2 firmware do not match. Later I will look at how to reassign contacts programmatically.
so, do i get this right, you changed the pinout of the BBB in your distro, so there is No way
to make your distro work with hermes chronus ?
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Old 22nd July 2019, 01:48 PM   #656
Blitz is offline Blitz  Germany
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A few questions:

I used two separate PSU for BBB/Hermes and one for chronus on Vd , so both 5V. Now, do I need to set the j2 and j3 jumper still on Hermes ?


I started with PPY distro...where the clock polarity has been 7, not 3...so...can this destroy anything as I have read somwhere that the3.3V goes then to different pins?

Last edited by Blitz; 22nd July 2019 at 01:50 PM.
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Old 22nd July 2019, 01:53 PM   #657
ppy is offline ppy  Russian Federation
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Quote:
Originally Posted by Blitz View Post
so, do i get this right, you changed the pinout of the BBB in your distro, so there is No way
to make your distro work with hermes chronus ?
I did not change the Botic7 driver in the source codes, which affects pinout. The changes were made minimal for backward compatibility MPD at high DSD bit rates (disabled DSD_U8). Therefore, you just need to specify the correct parameters for your case in the uEnv.txt file.
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