Forum: Troubleshooting & Designing Networks
11-07-2020, 06:55 AM
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Replies: 30
Views: 1,988
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Forum: Troubleshooting & Designing Networks
11-06-2020, 07:55 PM
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Replies: 30
Views: 1,988
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Forum: Troubleshooting & Designing Networks
11-06-2020, 07:53 PM
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Replies: 30
Views: 1,988
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Forum: Troubleshooting & Designing Networks
11-06-2020, 09:36 AM
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Replies: 30
Views: 1,988
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Forum: Troubleshooting & Designing Networks
11-05-2020, 07:01 PM
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Replies: 30
Views: 1,988
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Forum: General Computer & Tech Discussion
11-04-2020, 04:27 PM
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Replies: 11
Views: 1,067
Re: NAS boot issue
It's not part of my "job" (I'm not an IT person). Rather, I have a sh*tload of stuff that I preserve as a consequence of designing hardware/software (for decades).
As a "normal person", I'd...
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Forum: Troubleshooting Power Supplies and Power Supply Design
11-04-2020, 01:37 AM
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Replies: 3
Views: 556
Re: What do you repurpose server PSUs for?
I have a pair of them (85A @ 12V -- 1000W) that I've stacked to form a 24V supply for an electric wheelbarrow (previously was an electric wheelchair so it goes forward/backward, left/right as well as...
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Forum: General Computer & Tech Discussion
11-03-2020, 10:21 PM
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Replies: 11
Views: 1,067
Re: NAS boot issue
Sorry, I just noticed your location. We think nothing of having "extra computers", here.
Unless you are really hammering on your NAS, you can usually opt for a less capable "PC" to host the...
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Forum: General Computer & Tech Discussion
11-02-2020, 06:29 PM
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Replies: 11
Views: 1,067
Re: NAS boot issue
My advice? Do yourself a favor and repurpose an old PC as a NAS. There are several "free" packages that you can load on generic hardware and get these features (often MORE features than a...
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Forum: General Computer & Tech Discussion
10-31-2020, 01:55 PM
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Replies: 11
Views: 1,067
Re: NAS boot issue
You have to very carefully review the process that is prescribed. Little changes can cause it not to fail (e.g., having the network cable plugged in may change whether or not the process works;...
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Forum: General Electronics Technical Discussion
10-30-2020, 07:50 PM
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Replies: 1
Views: 278
Re: Custom control board for TVs?
The electronics inside the TV have to do a few things:
- receive cable/OTA broadcasts
- drive speakers with the associated audio
- decode the "video" into signals appropriate for the LCD panel in...
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Forum: General Computer & Tech Discussion
10-30-2020, 02:32 PM
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Replies: 11
Views: 1,067
Re: NAS boot issue
Some NASs have software that resides on one (or more) of the drives. Firmware on the "motherboard" just loads this into the system's memory. (this isn't the case for all NASs as the FLASH...
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Forum: General Computer & Tech Discussion
10-28-2020, 06:42 PM
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Replies: 4
Views: 591
Re: Server emulation??
Likely impossible. If they've set things up to push you to their server (to retrieve your save data) when they could have also given you a local option, then they really WANT you to be tied to their...
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Forum: General Electronics Technical Discussion
10-25-2020, 03:51 PM
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Replies: 194
Views: 5,747
Re: Remote pump control ideas.
You don't need interrupts. In my example, you LIKELY would have them to provide the timing information. But, you could also implement delays using a real timer.
The point is that you can write...
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Forum: General Electronics Technical Discussion
10-25-2020, 12:04 PM
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Replies: 194
Views: 5,747
Re: Remote pump control ideas.
That's not the case with preemptive multitasking. And, many nonpreemptive systems can run "endless loops" as long as there is some transfer of control to the OS within that loop (i.e., any system...
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Forum: General Electronics Technical Discussion
10-21-2020, 11:28 PM
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Replies: 194
Views: 5,747
Re: Remote pump control ideas.
IIRC, the network drop comes in over fiber -- any sourced power would have to be available locally (in which case, why not let the MCU use it directly?)
That's been the case for many years,...
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Forum: General Computer & Tech Discussion
10-20-2020, 12:13 AM
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Replies: 4,849
Views: 802,336
Re: best cheap/free scores 1.1
Today, I recycled 6 Smart-UPS 1500s as a token offering to the "God of Equilibrium". I figure I still need to shed some more volume and mass. But, that was a good start.
What I really need to do...
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Forum: General Electronics Technical Discussion
10-19-2020, 04:51 AM
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Replies: 194
Views: 5,747
Re: Remote pump control ideas.
That's how a client-server system operates. The server exports a service. Clients make demands on that service.
DNS is a service. A client sends a request to the DNS server: "Give me the IP...
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Forum: General Computer & Tech Discussion
10-18-2020, 07:27 PM
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Replies: 4,849
Views: 802,336
Re: best cheap/free scores 1.1
Cripes! I'm a sucker for "free"... :spin: Time to see if there are any other things that I can add to my "scrap" pile to get rid of them, tomorrow!
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Forum: General Electronics Technical Discussion
10-17-2020, 07:28 PM
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Replies: 194
Views: 5,747
Re: Remote pump control ideas.
My point has to do with whether the end of the fiber is "the other end of the link" (dedicated between "switches" and "pump") or, just a "network drop"?
In the former case, you "own the wire" and...
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Forum: General Electronics Technical Discussion
10-16-2020, 05:48 PM
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Replies: 194
Views: 5,747
Re: Remote pump control ideas.
Presumably, the fiber is terminated into something "electronic" that presents a standard ethernet interface? Or, do you have to design hardware to support the optical transducers (presumably via...
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Forum: General Electronics Technical Discussion
10-16-2020, 01:31 PM
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Replies: 194
Views: 5,747
Re: Remote pump control ideas.
(sigh)
Sorry, I've lost track of what the desired goal of all of this is (and I'm not keen on reading 80 posts to sort it out!).
Think about what you are trying to do "in the abstract".
...
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Forum: General Electronics Technical Discussion
10-16-2020, 02:36 AM
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Replies: 194
Views: 5,747
Re: Remote pump control ideas.
I have no idea what their library supports. My (uninformed) opinion of these devices is that they aren't really intended for "serious" work.
"Eclipse" is pretty much the de facto IDE for most...
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Forum: General Electronics Technical Discussion
10-15-2020, 05:26 PM
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Replies: 194
Views: 5,747
Re: Remote pump control ideas.
A "server" is typically a single device. It can handle multiple clients, concurrently, using a number of different implementation mechanisms.
You would, thus, have a single node that exports a...
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Forum: General Electronics Technical Discussion
10-15-2020, 12:37 PM
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Replies: 194
Views: 5,747
Re: Remote pump control ideas.
You have to choose how your system configuration is managed.
Do you "tell" someone that there are N clients and they exist at the following IP addresses?
Is each client told of the identity of...
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