Author Topic: What did you buy today? Post your latest purchase!  (Read 1482443 times)

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Offline bitseeker

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Re: What did you buy today? Post your latest purchase!
« Reply #9775 on: February 19, 2020, 06:18:48 am »
Woah! That's a lot of pieces. It really is amazing that the VFD survived that shake-n-bake. I hope it runs OK and you're able to snag a deal on a dead one for a face transplant.
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Offline TerraHertz

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Re: What did you buy today? Post your latest purchase!
« Reply #9776 on: February 19, 2020, 06:29:11 am »
... and you're able to snag a deal on a dead one for a face transplant.

Heh. Someone has never tried living in Australia and paying US to Oz shipping costs. In US dollars times 1.5 (USD to AUD exchange rate) plus our lovely 10% tax on the purchase PLUS the shipping. And if I ship via my reshipper in CA, ALSO the commie-fornia tax on everything passing through.

No, this one is living with it's scarred face, and liking it.

Update: Ebay did indeed refund both item cost and shipping. So the lesson is, if you receive something via ebay Global Shipping Program, and when you receive the parcel it looks even slightly like the contents may be damaged, take lots of photos of the process of opening it and checking the contents. I've not used GSP much yet, and the few previous times I did were OK. But it seems the system may have a black spot or two.
« Last Edit: February 19, 2020, 06:50:05 am by TerraHertz »
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Offline bitseeker

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Re: What did you buy today? Post your latest purchase!
« Reply #9777 on: February 19, 2020, 06:44:32 am »
Yeah, even if the chances are remote, still wanted to offer well wishes. Rough week at work thus far, so trying to generate some positive vibes. ^-^
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Offline McBryce

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Re: What did you buy today? Post your latest purchase!
« Reply #9778 on: February 19, 2020, 07:35:33 am »
A box of fragments.

HP 66312A 0-20V/0-2A DYNAMIC MEASUREMENT DC SOURCE
Basically a DC power supply with lots of dynamic monitoring features.
Won for US $21.50 but it's heavy so the shipping (via ebay Global Shipping Program) was costly:
  Domestic leg         $65.45
  International leg   $61.28
  Import charges     $19.41

And then... it arrived massively smashed.

More pics: http://everist.org/pics/smashed/smashed.htm

It could be worse. According to ebay on the phone just now, they are going to refund in full. Item plus shipping.
This means I get a free jig saw puzzle to try and piece together. Visually it appears all the electronics survived, amazingly. But powering it up will be the test. Most lucky: the VFD is intact.  In fact the whole front display board seems undamaged, apart from some bent tabs on the spinner wheel sensor. So the thing may be salvageable. Though it's never going to look pretty.

3D printer job!

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Offline beanflying

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Re: What did you buy today? Post your latest purchase!
« Reply #9779 on: February 19, 2020, 07:43:34 am »
A box of fragments.

HP 66312A 0-20V/0-2A DYNAMIC MEASUREMENT DC SOURCE
Basically a DC power supply with lots of dynamic monitoring features.
Won for US $21.50 but it's heavy so the shipping (via ebay Global Shipping Program) was costly:
  Domestic leg         $65.45
  International leg   $61.28
  Import charges     $19.41

And then... it arrived massively smashed.

More pics: http://everist.org/pics/smashed/smashed.htm

It could be worse. According to ebay on the phone just now, they are going to refund in full. Item plus shipping.
This means I get a free jig saw puzzle to try and piece together. Visually it appears all the electronics survived, amazingly. But powering it up will be the test. Most lucky: the VFD is intact.  In fact the whole front display board seems undamaged, apart from some bent tabs on the spinner wheel sensor. So the thing may be salvageable. Though it's never going to look pretty.

3D printer job!

McBryce.

Ouchy  :'( There is only a rear end for that case series available https://www.thingiverse.com/thing:2186112 so it could be adapted to take either a Laser Cut insert panel for the buttons and bits might work better than all 3D printed. Or from scratch not that hard to make one up but I would still favour a Laser cut panel inside a housing.

At least it works and the price is minimal I guess  :palm:
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Offline McBryce

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Re: What did you buy today? Post your latest purchase!
« Reply #9780 on: February 19, 2020, 07:47:01 am »
I'd just make a clean cut, 3D print the end section and bond them together.

Oh, and I should mention, today I bought 100x KM4164 64Kx1 NMOS DRAM. I do a lot of retro computer repairs and go through a massive amount of these.

McBryce.
« Last Edit: February 19, 2020, 08:05:00 am by McBryce »
 

Offline blueskull

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Re: What did you buy today? Post your latest purchase!
« Reply #9781 on: February 19, 2020, 04:06:08 pm »
A Widora Tiny 200 ARM9 board with a 480*272 resistive touch panel.

Why? I'm anyway working on an HMI module based on the same chip.

Getting the board should save me some time on initial jump starting.

I don't want to include USB/UART in the final products, so all debugging must be done on a proper dev board, and my custom board runs without any console interface.

Also, I don't want to include uSD slot, so the only way I can iterate my design is with a proper dev board.

For a god part of the day, I spent it on getting XBoot to compile for F1C100S with minimum binary (3.4MB->230kB), to port it to F1C200S (double RAM), and to get it to run on SDL for a quick test.

I guess the next day for me would be messing with LittleVGL and getting it to run inside XBoot on native amd64/SDL, before getting the real hardware.
 

Offline BigBoss

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Re: What did you buy today? Post your latest purchase!
« Reply #9782 on: February 19, 2020, 06:20:30 pm »
I have tested the Noise Level of my TDS3034 using all 4Chs with ;
Time Base : 2ns/sec ( min )
Vertical :1mV/div (min)
Acquisition : Envelope
Trigger Source : CH1
Trigger Coupling : DC
No Probe Connected
All CHs are GND'd
Is that Noise Level normal for this type of oscilloscope ??

 
 

Offline Helix70

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Re: What did you buy today? Post your latest purchase!
« Reply #9783 on: February 19, 2020, 11:52:17 pm »
... and you're able to snag a deal on a dead one for a face transplant.

Heh. Someone has never tried living in Australia and paying US to Oz shipping costs. In US dollars times 1.5 (USD to AUD exchange rate) plus our lovely 10% tax on the purchase PLUS the shipping. And if I ship via my reshipper in CA, ALSO the commie-fornia tax on everything passing through.

No, this one is living with it's scarred face, and liking it.

Update: Ebay did indeed refund both item cost and shipping. So the lesson is, if you receive something via ebay Global Shipping Program, and when you receive the parcel it looks even slightly like the contents may be damaged, take lots of photos of the process of opening it and checking the contents. I've not used GSP much yet, and the few previous times I did were OK. But it seems the system may have a black spot or two.

It is all so random. I just received my 6612C, also using GSP, and it was USD47 for shipping from the US to Brisbane, plus USD28 import charges (although I paid USD179 buy it now). I believe mine weighs a little less, but still. Luckily mine arrived in great shape. Only complaint is my VFD is no great. It will do, but watching for a cheap replacement.
 

Offline WattsThat

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Re: What did you buy today? Post your latest purchase
« Reply #9784 on: February 20, 2020, 12:20:27 am »
TerraHertz: putting the bits back together will go reasonably well if you use the liquid styrene plastic model cement from a hobby shop. It’s typically methyl ethyl ketone or trichloroethylene, if it is available in Oz. MEK works best but it’s not available worldwide these days.

Had a similar problem on an HP E3640A, not as smashed as yours but it did go back together with minimal scaring.
« Last Edit: February 20, 2020, 04:00:47 am by WattsThat »
 

Offline Nominal Animal

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Re: What did you buy today? Post your latest purchase!
« Reply #9785 on: February 20, 2020, 06:23:19 am »
For ABS plastic stuff, you can make a slurry out of ABS shavings and a little bit of pure acetone, and use it to cover any small holes, or to weld two ABS edges together.  It'll leave a bump and a visible scar, but it does fuse the ABS together and leaves a stronger joint than any glue.

MEK does the exact same thing, and is also called butanone.  They're neither cements nor glue, really; they dissolve some of the material, so are basically welding agents.  If used in the right amount (not much; just enough to fully weld the mating surfaces), the join has the same properties as the original plastic.
 
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Offline deadlylover

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Re: What did you buy today? Post your latest purchase!
« Reply #9786 on: February 20, 2020, 11:12:33 am »
Bought this a few months back but forgot to share, it's the FY6900 signal generator that you can find rebranded everywhere. It was about 80 dollarydoos.

It came DOA and yet suspiciously plastered in QC Pass stickers with a birth certificate only a few weeks prior. Of course as an Eevblog member I could not just return it to the seller so I promptly destroyed some 'warranty void if removed' stickers and took it apart.

Oh there's your problem... the main PCB wasn't connected to the power supply.   :-DD

It takes a bit of faffing about in the menus but you can change it from Chinese to English in case anyone wanted to buy it cheaper through Taobao or the like.
 
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Online MarkL

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Re: What did you buy today? Post your latest purchase!
« Reply #9787 on: February 20, 2020, 03:23:12 pm »
I have tested the Noise Level of my TDS3034 using all 4Chs with ;
Time Base : 2ns/sec ( min )
Vertical :1mV/div (min)
Acquisition : Envelope
Trigger Source : CH1
Trigger Coupling : DC
No Probe Connected
All CHs are GND'd
Is that Noise Level normal for this type of oscilloscope ??

Yes.  I get the same thing on a TDS3054.  These scopes use CCDs for their acquisition which are inherently noisy, and also experience a lot of drift.

You are using infinite envelope mode, which is essentially doing a peak detect over the run time with infinite persistence, plus full bandwidth.  You are going to see the worst of the worst.
 

Online rsjsouza

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Re: What did you buy today? Post your latest purchase!
« Reply #9788 on: February 21, 2020, 12:22:18 am »
I got a few THS3091EVMs on the cheap from Newark. Pretty cool little dudes to play with CFB and high speed. Not bad for $7 a pop.
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Offline thm_w

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Re: What did you buy today? Post your latest purchase!
« Reply #9789 on: February 21, 2020, 12:58:02 am »
I got a few THS3091EVMs on the cheap from Newark. Pretty cool little dudes to play with CFB and high speed. Not bad for $7 a pop.

So that was you. Had to call them and get my 1pc removed to get it out of limbo. Their ordering system is total garbage :palm:

 

Offline TerraHertz

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Re: What did you buy today? Post your latest purchase
« Reply #9790 on: February 21, 2020, 09:31:55 am »
It works!


Mostly anyway. There seem to be some rather weird/confusing custom configs. Need to read the manual, set it back to defaults.
Not easy to use like this, the buttons keep creeping off center.

TerraHertz: putting the bits back together will go reasonably well if you use the liquid styrene plastic model cement from a hobby shop. It’s typically methyl ethyl ketone or trichloroethylene, if it is available in Oz. MEK works best but it’s not available worldwide these days.

Had a similar problem on an HP E3640A, not as smashed as yours but it did go back together with minimal scaring.

MEK not available you say? Here's my plastics repair kit:



4 L of MEK and  glass syringe with fine needle. And G-clamps, tape, etc.
The supplier was out of stock of screw-top tins when I bought that, darnit. So paint tin it was. I must find a screw top tin, that thing is a pain to open. And wow, the evaporation rate! On the plus side, bulk MEK is remarkably _pretty_. Hard to describe, but it is.

The bent metalwork is all straightened out now. It remains to be seen how many plastic fragments are missing.

Edit to add: A couple more things arrived. After the box of fragments, I've got a box of air, and a box of nCoV.
The first is a module extender for a HP 83480 scope. Yes I finally bought some actual plugins for this - http://everist.org/NobLog/20141029_HP83480A_teardown.htm, on their way now. Only took 6 years before I could afford them.  The extender pretty much is a 'box of air.' Quite expensive air.



The second is one of those fake Agilent USB HP-IB interfaces, from China.



« Last Edit: February 21, 2020, 10:04:10 am by TerraHertz »
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Online exe

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Re: What did you buy today? Post your latest purchase!
« Reply #9791 on: February 21, 2020, 01:52:35 pm »
I'm in the business of seeking/making an ideal bridge rectifier (this is my weird hobby, like some people do volt-nutting). Thanks to AoE I got to know about FERD diodes. Now I got some.

0.25V dropout at 1A, 0.28V@2A dropout (went down to 0.27V after self-heating) at "room temperature"... Not ideal, but good-enough so I can ditch lt4320 in favor FERD in my designs. Here is the datasheet if someone interested: https://www.st.com/resource/en/datasheet/ferd40u50c.pdf . Didn't measure reverse current, it's probably very high (esp. at elevated temperatures), but that's not a concern for me.
 
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Online edy

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Re: What did you buy today? Post your latest purchase!
« Reply #9792 on: February 21, 2020, 02:46:33 pm »
I promised my wife I would stop buying cheap watches... as I went on a bit of a rampage over the past few months once I discovered a bunch of very interesting-looking options on eBay. Hey at least they didn't cost that much... unlike some other hobbies people can get into. And I made the excuse that I was getting them only so I could do YouTube video reviews (although she caught on to that lie pretty quick).  :-DD 

Anyways, my latest purchase is the Jaragar A034 (far left in the video screenshot below) which just came from China (hopefully not laden with coronavirus although if you see me stop posting in a month, you'll know why). Still fresh from my watch-binge (buying 3 oversize watches) I found this $18 automatic skeleton watch with a slide rule bezel which I really enjoy having. You will see by my video below that I already owned an older automatic Citizen handed down (although I can't tell you the year it was made... maybe one of you knows) and a slide rule Seiko Flightmaster which is much more expensive that I didn't want to wear daily. This Jaragar is cheap enough but still looks sophisticated with the skeleton and slide rule, and is automatic. Here it is compared to the other 2 watches I just mentioned:



I know how to use the outer 2 rings of the slide rule... but I have not figured out what to do with the inner rings. The inner-most starts at 0 (or 30) at the 12 o'clock position and goes 0-30 evenly. The next-most ring has 120 at the 12 o'clock and increments non-linearly but going counter-clockwise with 160 at the 9 o'clock, and 240 at the 6 o'clock. Somewhere around 4 o'clock is says BASE 1000 M and then the first number at 3 o'clock is 55. Any ideas? See this photo:



And in case you haven't seen my other 3 cheap eBay watches which I bought (the Jaragar above would be my 4th.... the other 3 were composed of 2 SKMEI's and 1 no-name Diesel knock-off), the video is shown below. Remember these were all under $20, some were under $10. I bought them to have a little different variety during the week and they look interesting but they are HUGE. I guess I was rebelling since I have been wearing this pinsky little Garmin vivofit4 for the past year. I have a few digitals but few analog watches and the ones I do are more expensive that I would want to only wear to events and formal situations, not as daily beaters or for casual outings. Therefore, to go the other extreme from my vivofit4 I decided to find the BIGGEST GAWKIEST oversized monstrosities I could find just to have a laugh at the entire style but not break the bank. Obviously my wife did not agree with my humor.  :-DD



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Offline bitseeker

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Re: What did you buy today? Post your latest purchase
« Reply #9793 on: February 21, 2020, 07:04:27 pm »
It works!

Mostly anyway. There seem to be some rather weird/confusing custom configs. Need to read the manual, set it back to defaults.
Not easy to use like this, the buttons keep creeping off center.

Well, that's some good news. I'm still amazed it survived that.

Quote
The second is one of those fake Agilent USB HP-IB interfaces, from China.

I'm curious if they've changed at all, especially with regard to the RF shielding inside the enclosure.
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Offline digsys

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Re: What did you buy today? Post your latest purchase!
« Reply #9794 on: February 21, 2020, 11:29:45 pm »
Quote from: exe
... Not ideal, but good-enough so I can ditch lt4320 in favor FERD in my designs. Here is the datasheet if someone interested: https://www.st.com/resource/en/datasheet/ferd40u50c.pdf ....
Just curious .. what don't you like about the LT4320 approach? I've made 100s devices over many years without ever an issue? Even up to 50A bridges
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Offline Helix70

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Re: What did you buy today? Post your latest purchase
« Reply #9795 on: February 22, 2020, 01:18:30 am »

The second is one of those fake Agilent USB HP-IB interfaces, from China.

(Attachment Link)

Does it work well? I am looking at getting one of these and am a little gun shy.
 

Online Mr. Scram

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Re: What did you buy today? Post your latest purchase
« Reply #9796 on: February 22, 2020, 01:54:38 am »
Does it work well? I am looking at getting one of these and am a little gun shy.
As far as I know they tend to work well initially but don't always last. That was a while back though, I'm not sure about current versions.
 

Offline beanflying

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Re: What did you buy today? Post your latest purchase
« Reply #9797 on: February 22, 2020, 02:01:50 am »

The second is one of those fake Agilent USB HP-IB interfaces, from China.

(Attachment Link)

Does it work well? I am looking at getting one of these and am a little gun shy.

I have had mine for a while and it does what I need. @bitseeker no they are not internally shielded like the real deal.

Given the price disparity and the totally OTT premium Agilent and now Keysight charge for them worth the small risk in particular with Paypal as a DOA warranty.
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Offline McBryce

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Re: What did you buy today? Post your latest purchase
« Reply #9798 on: February 22, 2020, 08:33:13 am »
Does it work well? I am looking at getting one of these and am a little gun shy.
As far as I know they tend to work well initially but don't always last. That was a while back though, I'm not sure about current versions.

I was given one of those HP USB-GPIB intefaces (it was included in a box of random cables I bought), but I've never tried it out. I'm not sure if it's real or fake. Is there a thread showing the differences or how to tell which it is? And what software can I use (Win 10) to test it. Does it show up as a COM port?

McBryce.
 

Offline beanflying

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Re: What did you buy today? Post your latest purchase
« Reply #9799 on: February 22, 2020, 08:51:32 am »
Does it work well? I am looking at getting one of these and am a little gun shy.
As far as I know they tend to work well initially but don't always last. That was a while back though, I'm not sure about current versions.

I was given one of those HP USB-GPIB intefaces (it was included in a box of random cables I bought), but I've never tried it out. I'm not sure if it's real or fake. Is there a thread showing the differences or how to tell which it is? And what software can I use (Win 10) to test it. Does it show up as a COM port?

McBryce.

Somewhere in hear the truth may lay  ;) If you split it and the plastic is conductively coated then most likely the real thing. I am not aware of any of the clones made with that done https://www.eevblog.com/forum/testgear/flood-of-new-agilent-82357b-gpib-usb-adaptors-on-ebay-the-real-deal/
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