It appears that C427 and C418 are 2.5V electrolytic capacitors. Their low
voltage rating suggests that they are associated with a switch-mode
regulator that supplies power to the CPU. Notice that the inductors, L30
and L31, are very close to the place you identified as the source of
sound. I sugge
way is to use a small microphone as a probe to find the
source. Another possibility is to somehow couple a hose to your ear and use
the other end as a probe. The most likely source is one of the inductors.
Gavrik Peterson
On Sun, Jan 24, 2016 at 4:55 PM, ED Fochler
wrote:
> Soekris boards use
My 5501 has the same configuration as Jan's, and I am unable to notice any
noise at all. The last time I checked my hearing it went up to 18kHz in the
good ear. So I am having difficulty understanding why Jan is experiencing
this noise and especially noise at such a high level. And the fact that
th
As I have limited information, I am not sure what is going on here. But I
assume that the electric shock you refer to happens when you touch the case
of the 6501 or 5501. I further assume that the Soekris units were not
otherwise grounded. And that the electric shock occurred when the unit was
ligh
I don't think read/write and idle power specifications are going to be
all that useful. These specifications are related to average demand
not peak demand. The question that needs to be answered is, will the
power supply be able to supply the peak (instantaneous) current
demands of the hard drive.
Wow! My question about JP3 sure got a big response. I think this is
the second time I asked about something like this and it turned into
complaints about the lack of documentation.
> How hard can it be to type a few lines about pin layout in a text editor?
Bill asks a very good question. Rather s
The discussion about USB and JP8 on the net5501 got me wondering about
JP3 which is located right next to the Geode processor. JP3 is a row
of seven holes (no header is mounted as shipped by Soekris). The Geode
processor has video outputs and I was thinking that JP3 might be the
red, green, blue an
When selecting a power adapter it is good to understand a few things
about how they work. Power adapters are either of the unregulated or
regulated type. Within the regulate type there are two basic designs.
The three possibilities are listed below:
Unregulated Silicon Steel Transformer Type -- Th
Nice images illustrating your shielding fix.
It appears that you are using the U.FL to RP-TNC pigtail that Metrix
supplies. While it's coaxial cable is small in diameter this does not
mean that it is not effectively shielded. The thickness of the outer
conductor does not matter at 2.4GHz because t
Not sure if this is relevant, but the Geode LX processor data sheet
says this device has 'High-resolution CRT and TFT outputs'. I don't
know if these pins are made available on the 5501. Next to the
processor are seven holes for an unmounted header labeled JP3. What is
this for?
-- Gavirk
On D
he fixed disk issues over the disk light if I have to choose
> BIOS versions. :)
I agree. And now that DMA is working IDE transfers are much faster.
Still I wonder what is going on with the disk light.
- Gavrik Peterson
___
Soekris-tech mailing lis
Greetings People,
After upgrading the BIOS from 1.32 to 1.32i the Disk light on my
net5501no longer works. A CF module is the only device connected to
the IDE interface which now seems to have DMA transfers working.
Is this a known bug? Or, is there something I have overlooked?
- Gavrik
I just purchased a Transcend Compact Flash card for my net5501 (my first
Soekris machine) and was disappointed that it was detected as 'slave'. I
tried two other CF cards and found that a U-Tek is also detected as slave.
Only the Sandisk card was detected as master. All these cards are detected
as
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