Author Topic: Test Equipment Anonymous (TEA) group therapy thread  (Read 1466335 times)

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Offline GregDunn

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15950 on: September 06, 2018, 10:20:22 am »
I had a few moments to kill while in town for band practice today, so naturally (!) I wandered over to the local pawn shop.  I wasn't really intending to buy anything, but in the tools case was this old BK Precision meter model 5360.  Yeah, not the greatest meter ever, but it is a 50,000 count true RMS meter with a bar graph.  It was marked $10, but when I asked the associate to let me turn it on, it showed a display test and then some kind of error message on every mode (not a low battery indicator).  I couldn't quite read the message because, typically, the price sticker was on the display.   >:(  The guy scratched his head and said I could have it for $5.  I was pretty sure it couldn't have anything seriously wrong with it if the display test worked, so I forked over the money and left with it. 

In the parking lot, I carefully scraped off as much of the sticker as I could and switched the meter on again.  OK, go ahead and make fun of me; I spent a minute staring at it and trying to figure out what kind of code this was; then it snapped into focus and I laughed.  Easy fix.  After replacing FUSE2, it works great.

This is an IP67 rated meter, so access to the innards was a bit weird.  You're supposed to have a tool built into the bail stand to pop the protective covers off, but of course it was missing so I had to make do with a small screwdriver blade.  the battery and fuses are easily reachable without any further manipulation, and it did have good HRC fuses inside.  So, a win - even though the fuses are worth more than the meter cost.   ;D
 

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15951 on: September 06, 2018, 10:52:13 am »
Nice catch, Greg. Bad sticker paid off.
I TEA.
 

Online tautech

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15952 on: September 06, 2018, 11:05:31 am »
Hou want a link to my ebay, don 't you?

DONT YOU?
Of course !  :P
You must wear it like a TEA enablers badge of honor embedded somewhere in your profile info.  >:D
Do it, do it now !
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Online med6753

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15953 on: September 06, 2018, 11:22:45 am »

I dunno... I'm with SpecMaster on this one. Painting that barrier wall grey, especially in today's batshit crazy world of constant stress, electronic leashes and jobs where they expect you to keep in touch and actually complete tasks while driving... It's like deliberately placing a booby-trap on the side of a busy highway. Sooner or later some booby is going to come along and get caught in it; the busier the highway, the sooner and more often. 

Look at the scene from this smaller perspective; at first glance, it looks like just a shoulder on the highway. We paint curbs on divided highways yellow for the same reason; I see this as being no different.
 
If too many distracted drivers hit it like that guy, the owner could be sued for creating a public safety hazard. People are going to hit that camouflaged wall, and no matter whose fault each individual accident is, that retaining wall is going to get smashed until it caves in.

Bottom line is it was a fuckwit stupid poor choice of color, but it won't be especially expensive to fix. Much less expensive than rebuilding the retaining wall.

mnem
*ignorant asshole*
Mnem, no disrespect but that one of the dumbest arguments I've ever heard to justify distracted driving.  :palm: Are you the guys lawyer?  :-DD

It's pretty simple to me. See the double yellow line? Yep. See the edge white line? Yep. Drive in between them and you'll have no problem. Wander outside of them and you'll hit something, regardless of what color it's painted.   ::)
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Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15954 on: September 06, 2018, 11:26:39 am »
In Other News...
Quote from: mnementh
  Aaaand the joy keeps on coming. Got everything set up to print; things actually went quite well. Set the printer up on my bench, leveled it, put up a curtain rod with my spool of filament since I knew I was printing a tall object... all before my first cuppa coffee. Then I put the card with my object in the printer and it all turned to shit.

The build volume in the firmware in my printer is still set to the generic stock figures of 300 x 300 x 400; the Tornado will actually do 310 x 320 x 400, and the difference between the two is the "margin" that Cura REFUSES to slice anything 300mm wide otherwise. Evidently Cura includes that margin on the finished GCODE; as the printer says the file dimensions are too big.  |O Of course you can't reset the build volume from the front panel; that would be too easy.  |O |O I have to plug the damned thing into a USB on my PC and learn how to use the freaking Marlin control panel... or do everything from the control line in the Arduino console like they did in the stone age.  |O |O |O

mnem
*Feeling like I'm the dead horse smoothee*  :horse:

       

I'm a complete 1D10T.   :scared:

After beating my head against the wall all day trying to understand all the permutations that this 3D Printer which has only been in existence for a freaking YEAR has already gone through (to be sure I'm getting the right version of Marlin with the right options and configuring it right), then getting sidetracked with fixing a heat sink that had fallen off of a stepper drive... then going down the stepper current rabbit-hole, clawing my way back to the surface, putting the controller back together and going back to change one minor detail...  :palm:

...I discover that while I had rafts and supports disabled in Cura, it still had adhesion brim (an extra ~3mm around the perimeter of the print that prints paper thin so it can easily be deburred off) enabled. Turned that off, and everything sliced without issue.  :palm: :palm:

Now I'm two hours into what was supposed to be a 2 hour 14 minute print; we've got the first 3 layers down. I thought it was a bit optimistic as I'm using a 0.1mm layer height fine profile, which I want as I intend for this to be on my bench a good long time, and I wanted to see just how good quality this thing can do stock.

Went back to Cura to check and...  2d 14h 51m... 


  :palm: :palm: :palm:


Well, I've got a good excuse to be elsewhere for the next 2 days...  :-DD

mnem
"Domo origato, Mr Roboto..."
« Last Edit: September 06, 2018, 11:29:53 am by mnementh »
 

Online tautech

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15955 on: September 06, 2018, 11:35:39 am »
... then going down the stepper current rabbit-hole, clawing my way back to the surface, putting the controller back together and going back to change one minor detail...  :palm:
mnem
"Domo origato, Mr Roboto..."
Have a look at the mods Defpom did on his stepper drivers:

https://youtu.be/S75meJJm9Kw

Dunno if yours uses the same ones though.  :-//
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Online Specmaster

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15956 on: September 06, 2018, 11:39:59 am »

I dunno... I'm with SpecMaster on this one. Painting that barrier wall grey, especially in today's batshit crazy world of constant stress, electronic leashes and jobs where they expect you to keep in touch and actually complete tasks while driving... It's like deliberately placing a booby-trap on the side of a busy highway. Sooner or later some booby is going to come along and get caught in it; the busier the highway, the sooner and more often. 

Look at the scene from this smaller perspective; at first glance, it looks like just a shoulder on the highway. We paint curbs on divided highways yellow for the same reason; I see this as being no different.
 
If too many distracted drivers hit it like that guy, the owner could be sued for creating a public safety hazard. People are going to hit that camouflaged wall, and no matter whose fault each individual accident is, that retaining wall is going to get smashed until it caves in.

Bottom line is it was a fuckwit stupid poor choice of color, but it won't be especially expensive to fix. Much less expensive than rebuilding the retaining wall.

mnem
*ignorant asshole*
Mnem, no disrespect but that one of the dumbest arguments I've ever heard to justify distracted driving.  :palm: Are you the guys lawyer?  :-DD

It's pretty simple to me. See the double yellow line? Yep. See the edge white line? Yep. Drive in between them and you'll have no problem. Wander outside of them and you'll hit something, regardless of what color it's painted.   ::)
My suggestion to paint the wall in another colour was just that, a suggestion. From the angle the photo was taken the wall is a different colour but only just.

What we don't know is how does it appear from the drivers viewpoint, nor do we know the circumstances, was the sun in the drivers eyes etc etc.

Fact is it has been hit before so there may be other things at work here. If it was my wall I'd paint it to aid visibility to the drivers, cheaper then repairing it if the driver did not stop etc.
« Last Edit: September 06, 2018, 04:51:41 pm by Specmaster »
Who let Murphy in?
 

Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15957 on: September 06, 2018, 11:51:13 am »

I dunno... I'm with SpecMaster on this one. Painting that barrier wall grey, especially in today's batshit crazy world of constant stress, electronic leashes and jobs where they expect you to keep in touch and actually complete tasks while driving... It's like deliberately placing a booby-trap on the side of a busy highway. Sooner or later some booby is going to come along and get caught in it; the busier the highway, the sooner and more often. 

Look at the scene from this smaller perspective; at first glance, it looks like just a shoulder on the highway. We paint curbs on divided highways yellow for the same reason; I see this as being no different.
 
If too many distracted drivers hit it like that guy, the owner could be sued for creating a public safety hazard. People are going to hit that camouflaged wall, and no matter whose fault each individual accident is, that retaining wall is going to get smashed until it caves in.

Bottom line is it was a fuckwit stupid poor choice of color, but it won't be especially expensive to fix. Much less expensive than rebuilding the retaining wall.

mnem
*ignorant asshole*
Mnem, no disrespect but that one of the dumbest arguments I've ever heard to justify distracted driving.  :palm: Are you the guys lawyer?  :-DD

It's pretty simple to me. See the double yellow line? Yep. See the edge white line? Yep. Drive in between them and you'll have no problem. Wander outside of them and you'll hit something, regardless of what color it's painted.   ::)

I'm not justifying.  :palm:

But the reality is that the world is full of dumbasses. They outnumber non-dumbasses easily 10:1, so like it or don't they get their way. (See supply-side economics, Resident Chump, Brexit, etc) And like it or not, they're allowed to drive too. I'm all for dumbasses winning the Darwin award in general, but this particular case really is on the wrong side of the line. EVERY DAMNED ONE OF US takes our turn being the dumbass at some time or another... every damned one of us has been distracted at the wheel at some time.

That retaining wall is literally camouflaged; your pic shows that plain as day. It IS an accident waiting to happen.  AND it will happen, over and over again.

Arguing whose fault it is... what the eff difference does that make to the wall as it cracks and crumbles and the house slides down a hilll? Or to the passenger who may die needlessly? Whose fault is it? Those who were smart enough to see the accident-waiting-to-happen, and still did nothing to prevent it, that's who.

And NO... the white line does NOT mean "you're going to hit something". It means "This is where the highway ends, the other side of this is either a shoulder, or something less driveable." It is NOT a "warning" it is a "guide line". There are parts of the country where the shoulders of the roads are specifically used as an extra lane for rush hour traffic.

mnem
*3D-ed out*
 

Offline neo

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15958 on: September 06, 2018, 11:51:26 am »
Going to another hamfest this Friday and Saturday, it is 250 miles away but it appears to be a big one and just so happens to be on my birthday. Anyone wondering how much crap valuable treasures i'll drag back this time?
A hopeless addict (and slave) to TEA and a firm believer that high frequency is little more than modern hoodoo.
 

Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15959 on: September 06, 2018, 12:23:31 pm »
... then going down the stepper current rabbit-hole, clawing my way back to the surface, putting the controller back together and going back to change one minor detail...  :palm:
mnem
"Domo origato, Mr Roboto..."
Have a look at the mods Defpom did on his stepper drivers:
[DEFPOM RepRap Mod Video]
Dunno if yours uses the same ones though.  :-//
He's modding an MKS-Base board with integrated stepper drivers. Mine is a MKS- Gen L; it has socketed drivers. The mod he's talking appears to be a pseudo "silent-step" mode popular with TMC2208 stepper drivers; the MKS Gen-L supports them, and it has jumpers under the sockets to do that.

I'm amazed he's spending that kind of time on a freaking $15 controller... I'd have chunked it and spent the $25-30 on a loaded Gen-L or RAMPS 1.4. I mean yeah, I get it... "the knowing's the thing"... but man, that's a LOT of microsurgery for what is still an inferior stepper controller.  :palm: And he's still gotta do it on at least two, preferably 4 of them...

mnem
*Says a prayer to Ifni for neo that he makes it home without a hernia*
« Last Edit: September 06, 2018, 12:26:06 pm by mnementh »
 

Online bitseeker

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15960 on: September 06, 2018, 01:49:16 pm »
Anyone wondering how much crap valuable treasures i'll drag back this time?

Nope, just patiently awaiting the pics. :popcorn:
I TEA.
 

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15961 on: September 06, 2018, 02:04:52 pm »
"Tales of Cerebus" has now been added to the Potpourri part of the Points of Interest section for easy access to all the parts.

Thanks to mnem for the help locating all the relevant posts.
I TEA.
 
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Offline GregDunn

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15962 on: September 06, 2018, 02:13:24 pm »
Going to another hamfest this Friday and Saturday, it is 250 miles away but it appears to be a big one and just so happens to be on my birthday. Anyone wondering how much crap valuable treasures i'll drag back this time?

I'm going to the Louisville fest Saturday.  I don't know whether to hope they don't have anything I want, or that I have enough money for everything that I find...
 

Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15963 on: September 06, 2018, 02:39:50 pm »
"Tales of Cerebus" has now been added to the Potpourri part of the Points of Interest section for easy access to all the parts.

Thanks to mnem for the help locating all the relevant posts.
I just tracked them all down... You somehow managed to fit all that meandering [Random Mode] mental fulminate into a single line item; I couldn't have done better. Bravo!  :-+  :-+  :-+

mnem
Oooh! random small packages from Asia!!!
« Last Edit: September 06, 2018, 03:40:44 pm by mnementh »
 
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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15964 on: September 06, 2018, 02:59:14 pm »
Glad to be of service. ^-^
I TEA.
 

Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15965 on: September 06, 2018, 03:23:13 pm »
In Other News...

       

It would appear that after 5 hours... I've printed an envelope.  :-DD   However, the slow boat from China finally docked with lots of goodies... LM723s, sockets & 10-turn pots to fix that monster 25A linear power supply, and breadboards & pin header to make that precision resistor array. w00t!

[EDIT]

Just as I was toddling off, it started printing the first layer of infill; we should now be at ~0.8mm of 150mm. A new kind of hypnotic... yet a familiar pattern, woven into my very DNA after 50 years...

A little Tholian Web, anyone?  ;)

[/EDIT]

mnem
I think I hear a bed calling my name...
« Last Edit: September 06, 2018, 03:38:28 pm by mnementh »
 

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15966 on: September 06, 2018, 03:45:16 pm »
Funny, I was thinking of the Tholian Web, too.

Let me know how you like those Bourns-like pots. I've only tried one. Works fine, but take a bit more torque to rotate than a genuine one. Not sure about durability.
I TEA.
 

Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15967 on: September 06, 2018, 03:59:39 pm »
Durability is very very poor from experience. I tried using them for varactor based tuning controls due to the scarcity and price of air variable capacitors. They got dicky very quickly and the end stops break easily.

Ended up swapping them out for Bourns ones at £16 a pop. Stings but worth it.

At this point though a shit but useable encoder, AVR, LCD and Si5351A cost less than a damn pot  :(
« Last Edit: September 06, 2018, 04:02:11 pm by bd139 »
 

Offline Cerebus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15968 on: September 06, 2018, 11:11:44 pm »
I've had better success with the Chinesium multiturn pots. I haven't broken the end stop off any of them. Then again, I don't have penis fingers which might be a contributory factor.

One thing I will say against them is that, although their set-ability is good, it isn't as good as the genuine article. You'll get a good 11 to 11.5 bits of set-ability out of the Chinese pots, closer to 12 bits out of the genuine article from Bourns.
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Offline bd139

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15969 on: September 07, 2018, 12:24:05 am »
Depends on how you use them as well. When you’re band scanning with them they get whipped hard into the end stops quite regularly. Especially from those of us who switch back and forth between them and continuous rotation encoders.

I wonder if there’s a market for one piece optical encoder, DAC and display devices. Reckon you could mass produce them for less than a Bourns pot and get 14-bits or better.
 

Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15970 on: September 07, 2018, 12:52:46 am »


I'm using them in the monster 25A Phase III 5-15V power supply from my   PSA: Situational Awareness!!!   post a couple months ago.

I'm pretty sure they'll still be an upgrade from the cheap-ass plain-Jane 1/4W 1Kohm linear carbon-film pot that came in it.  :-DD

It was a case of "a lot of 5 is cheaper than Qty 2". Not sure yet what I'll do with the extras. Probably stick a couple of 'em in a baggie along with some LM723s and 2SD1049s and stash it all in a corner of the PSU against future "incidents".

mnem
That pic makes me feel a little teste.
« Last Edit: September 07, 2018, 01:14:27 am by mnementh »
 

Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15971 on: September 07, 2018, 01:10:04 am »
Depends on how you use them as well. When you’re band scanning with them they get whipped hard into the end stops quite regularly. Especially from those of us who switch back and forth between them and continuous rotation encoders.

I wonder if there’s a market for one piece optical encoder, DAC and display devices. Reckon you could mass produce them for less than a Bourns pot and get 14-bits or better.

Isn't that pretty much what they did with the T-12 OLED controller and the DPS-xx-xx series CC/CV power supply modules?  ;)

Where the value in such a thing would come would be in the form of an easily-understood setup script that permits an editable definition on the screen, editable voltage range, and editable scale for the output. Maybe have a % of full-scale bar graph simultaneously.  One of the bi-color OLED displays would be ideal.

mnem
*Software-deficient*
« Last Edit: September 07, 2018, 01:15:12 am by mnementh »
 

Offline Cerebus

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15972 on: September 07, 2018, 01:23:11 am »
Some of the old Philips 'scopes have encoders with an LCD next to them for things like timebase or vertical sensitivity. I always rather liked that.

The difficulty with a pre-built control with encoder and display in one would be finding a form factor that didn't need a custom front panel punch to make a cutout for it.

Found a picture:


« Last Edit: September 07, 2018, 01:29:18 am by Cerebus »
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Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15973 on: September 07, 2018, 01:38:43 am »
AAAARRRGGH!!!



I just realized... now that I have some coffee in me... that I don't have a workbench for the next 2 days.   :palm:

mnem
D'OH!!!
 

Offline mnementh

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Re: Test Equipment Anonymous (TEA) group therapy thread
« Reply #15974 on: September 07, 2018, 01:53:58 am »
    Some of the old Philips 'scopes have encoders with an LCD next to them for things like timebase or vertical sensitivity. I always rather liked that.

The difficulty with a pre-built control with encoder and display in one would be finding a form factor that didn't need a custom front panel punch to make a cutout for it.
Not difficult at all. Just make it so the encoder is separate from the display module with a short pigtail. Then the display module can be used in an existing panel or built into a standard-size bezel like all the panel meters on fleaBay.  Could actually cover pretty much every contingency with that version and another version with the encoder built into the bezel; maybe make the bezel symmetrical so the encoder can be on the left or right side, or sell the module and separate bezels for common layouts like left, right, over or under the display.

Other options could be the encoder and voltage reference in one unit, and the display/driver in a separate module so the device could be really flexible. The display could be a universal meter module, the encoder a programmable scalar voltage reference.

We already do something similar to this for flight controllers used with FPV quads; we have HUD with battery V/A draw/mAH consumed among other variables superimposed on the FPV video stream. All is done with simple shunts & voltage dividers.

mnem
*fulminating at the mind*
« Last Edit: September 07, 2018, 01:58:44 am by mnementh »
 


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