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Search: Posts Made By: Curious.George
Forum: General Computer & Tech Discussion Yesterday, 03:05 AM
Replies: 3
Views: 58
Posted By Curious.George
Re: Dmx/rdm

FWIW, attached is one such fixture in "test" mode (all LEDs lit, but at very low intensity). Unfortunately, camera gets confused when you shine a light in its face! Diddle-stick as a reference for...
Forum: General Computer & Tech Discussion 03-28-2020, 11:35 PM
Replies: 3
Views: 58
Posted By Curious.George
Re: Dmx/rdm

DMX (Digital MultipleX) is typically used for controlling lighting systems (theatrical, architectural, etc.). It's a protocol layered on an EIA485 network that allows a "controller" to talk to the...
Forum: General Computer & Tech Discussion 03-27-2020, 03:53 PM
Replies: 3
Views: 58
Posted By Curious.George
Dmx/rdm

Anyone with firsthand experience with DMX/RDM?
Forum: General Electronics Technical Discussion 03-26-2020, 02:07 PM
Replies: 3
Views: 69
Posted By Curious.George
Re: "Low Impedance" vs "Low ESR"

An ideal capacitor (which only exists "in theory") has no resistive component. It is a perfect energy storage component; everything that goes in (can) eventually come back out.

In practice, a...
Forum: General Computer & Tech Discussion 03-26-2020, 05:34 AM
Replies: 798
Views: 255,355
Posted By Curious.George
Re: Post your system.......

The usual way around that is to either donate them to a non-profit or auction them off.

Local university has monthly auctions where damn near everything that you would consider saleable is up for...
Forum: General Computer & Tech Discussion 03-26-2020, 02:07 AM
Replies: 38
Views: 540
Posted By Curious.George
Re: Window XP Product Actvation Not Working

You're assuming that the OS under which VirtualBox runs cost nothing to install, originally, and nothing ever "fucks (it) up".



I've found that I can usually reinstall a CZ image in about the...
Forum: General Computer & Tech Discussion 03-24-2020, 12:02 AM
Replies: 38
Views: 540
Posted By Curious.George
Re: Window XP Product Actvation Not Working

I am positive (99.2603%) that I have a copy, here. I recall finding one just about the time I was moving my machines to W7x64 and debated staying with XPx64 as "insurance" that my drivers, apps,...
Forum: General Computer & Tech Discussion 03-23-2020, 02:39 PM
Replies: 38
Views: 540
Posted By Curious.George
Re: Window XP Product Actvation Not Working

It shouldn't be hard to find "genuine media" in a thrift store, friend's junk pile, etc.. I routinely pick up anything "genuine" that I come across as they are usually practically given away...
Forum: General Electronics Technical Discussion 03-23-2020, 12:39 PM
Replies: 42
Views: 527
Posted By Curious.George
Re: Sending PWM through a relay

Think about it...

If your "device" (be it an oven controller, DSO, LA, etc.) is connected to your internet, then you CAN have a "local interface" anywhere/everywhere that you have (or CAN have) a...
Forum: General Computer & Tech Discussion 03-23-2020, 03:14 AM
Replies: 38
Views: 540
Posted By Curious.George
Re: Window XP Product Actvation Not Working

I'm always leary of "foreign" downloads -- unless every file IN the ISO is signed and/or the ISO claims to be a copy of one from a known producer and the hash is available on that original producer's...
Forum: General Computer & Tech Discussion 03-22-2020, 07:55 PM
Replies: 38
Views: 540
Posted By Curious.George
Re: Window XP Product Actvation Not Working

Yes. I've never installed a VLK here (though see below) as I want the ability to expose a machine to the outside world (e.g., this one) even if I don't ever do it. Using the OEM "self-activating"...
Forum: General Computer & Tech Discussion 03-22-2020, 02:34 PM
Replies: 38
Views: 540
Posted By Curious.George
Re: Window XP Product Actvation Not Working

Sam doesn't indicate whether it is a "beige box" or a "brand name" computer. In the latter case, hunting down XP install media from that manufacturer will usually eliminate the need for activation...
Forum: General Electronics Technical Discussion 03-22-2020, 01:17 PM
Replies: 42
Views: 527
Posted By Curious.George
Re: Sending PWM through a relay

That was my point. You need a "high level" interface to program the oven. Adding that TO the oven is just silly as it commits lots of resources to a low usage task.

Instead, you would want to...
Forum: General Electronics Technical Discussion 03-22-2020, 12:43 AM
Replies: 42
Views: 527
Posted By Curious.George
Re: Sending PWM through a relay

But you're not going to be twiddling any "knobs" on a "front panel". You're going to use it by defining a profile (did you want to have a numeric keypad and some bizarre set of "codes" to set up,...
Forum: General Electronics Technical Discussion 03-21-2020, 02:23 PM
Replies: 42
Views: 527
Posted By Curious.George
Re: Sending PWM through a relay

In general, you want to know when the loop has "stabilized" at the setpoint and use THAT point in time to start the "profile timer" (e.g., preheat at X degrees for M minutes). The expiration of the...
Forum: General Computer & Tech Discussion 03-21-2020, 11:33 AM
Replies: 4,372
Views: 669,928
Posted By Curious.George
Re: best cheap/free scores 1.1

If you have space for a rack, you can likely pick one up at a local auction for < $50 (often, folks just want to be rid of them as they are so large). I'm looking for 4 12U racks to set under my bed...
Forum: General Electronics Technical Discussion 03-21-2020, 03:24 AM
Replies: 42
Views: 527
Posted By Curious.George
Re: Sending PWM through a relay

Think about the two situations that you have to address:
- steady-state
- profile transitions

In the first case, you want the loop to compensate for "leakage" (in the oven) while you're...
Forum: General Computer & Tech Discussion 03-21-2020, 01:39 AM
Replies: 4,372
Views: 669,928
Posted By Curious.George
Re: best cheap/free scores 1.1

I scrounged some shelves out of a bookcase as they are ~30" long and about 10" wide -- just enough to slide under a machine. Also makes it easier to drag a machine "out" a few inches to reach behind...
Forum: General Electronics Technical Discussion 03-20-2020, 12:19 PM
Replies: 42
Views: 527
Posted By Curious.George
Re: Sending PWM through a relay

The coefficients (assuming the controller only uses the three "classic" ones and doesn't support bumpless transfer, integrator windup, etc. features) will change based on the operating point. (Note...
Forum: General Computer & Tech Discussion 03-19-2020, 11:54 PM
Replies: 4,372
Views: 669,928
Posted By Curious.George
Re: Dell Precision T7500 WS

You may want to look at the bracket that holds the cards in place before settling on video cards. I had to modify mine to accommodate the coolers on the cards.

You might also find a "base" for...
Forum: General Electronics Technical Discussion 03-19-2020, 08:04 PM
Replies: 42
Views: 527
Posted By Curious.George
Re: Sending PWM through a relay

You don't understand control theory.

A PID controller implements the following equation (with special caveats that are too numerous to describe, in detail, here):

out = Kp * error + Ki *...
Forum: General Electronics Technical Discussion 03-19-2020, 04:13 PM
Replies: 8
Views: 126
Posted By Curious.George
Re: Cash Register displaying an error

I can show you detailed documents that describe the various parameters that "you" can alter in an ECU. Should the automakers publish those documents so that the consumer (customer) can tinker with...
Forum: General Electronics Technical Discussion 03-19-2020, 04:06 PM
Replies: 8
Views: 126
Posted By Curious.George
Re: Cash Register displaying an error

But that's not the case, in this example:



Does it mean a stuck data line? Address decoding error? Single bad RAM cell?

And, what remedy should it suggest if NO USER SERVICEABLE PARTS...
Forum: General Electronics Technical Discussion 03-19-2020, 03:35 PM
Replies: 8
Views: 126
Posted By Curious.George
Re: Cash Register displaying an error

You're assuming the error message would make sense to Joe Average. Or, that the point in the code where it is detected can be irrefutably traced to a particular hardware fault.

If I write code...
Forum: General Electronics Technical Discussion 03-19-2020, 02:11 PM
Replies: 42
Views: 527
Posted By Curious.George
Re: Sending PWM through a relay

Then you'd likely want an overdamped loop. This will take longer to reach it's setpoint but will not overshoot (so you won't have to worry about how FAR it overshoots).

The downside is that if...
Showing results 1 to 25 of 500

 
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