Author Topic: What did you buy today? Post your latest purchase!  (Read 1608157 times)

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Offline cdev

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Re: What did you buy today? Post your latest purchase!
« Reply #7775 on: November 09, 2018, 07:45:06 pm »
You can turn $3 stlinkv2 clones (or the Blue Pill dev boards) into a "gnuk", (similar to Yubikey) dongle.

I decided to bite it and bought a YubiKey Neo authentication and cryptography module.
We use those at work.

Same here. 2FA is required for all employees in my facility. The second factor could be a YubiKey, or could be a text message.

I have a pile of 2FA kit for use with various contracts I work on, it's quite common.
Can those be wiped and reused? YubiKey can be wiped of its contents and repurposed.

I suspect not by the end user, there must be a way to get your 'secret' onto them and they must be registered somehow as they can be revoked but the back end is not something I have access to.

I have torn one down after it had been revoked but other than a set of programming contacts there's nothing that looks as convenient as the Yubi
Depending on what technology they used, it might be reprogrammable. At least (if you can find the documentations and if it is Flash reprogrammable) it can be wiped of all data and programming and you can build your own crypto code into it.
"What the large print giveth, the small print taketh away."
 
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Offline MrW0lf

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Re: What did you buy today? Post your latest purchase!
« Reply #7776 on: November 09, 2018, 08:25:59 pm »
 

Online MasterTech

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Re: What did you buy today? Post your latest purchase!
« Reply #7777 on: November 11, 2018, 12:49:29 pm »
HP 410C Voltmeter in mint condition with accessories.
One has to resort to 60s technology to have a meter with 100Mohm input impedance up to 1500V
Also for non-believers of the unique piece of technology this is, here is it measuring a 50Mhz sine amplitude, put out 500mVrms, measured 520mVrms


That's a beauty, especially getting all the accessories with it. :-+

Just noticed a folded paper that was beneath the meter, can't believe they made each scale unique for each instrument, now I get why it is so accurate.
Tektronix and HP, the best companies ever to exist !


« Last Edit: November 11, 2018, 02:52:22 pm by MasterTech »
 

Online Specmaster

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Re: What did you buy today? Post your latest purchase!
« Reply #7778 on: November 11, 2018, 12:58:12 pm »
HP 410C Voltmeter in mint condition with accessories.
One has to resort to 60s technology to have a meter with 100Mohm input impedance up to 1500V
Also for non-believers of the unique piece of technology this is, here is it measuring a 50Mhz sine amplitude, put out 500mVrms, measured 520mVrms




Nice bit of kit but I'm sure you get better input impedance with digital, like fluke 8842A and hp3478a meters?
Who let Murphy in?

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Online MasterTech

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Re: What did you buy today? Post your latest purchase!
« Reply #7779 on: November 11, 2018, 01:06:35 pm »
Nice bit of kit but I'm sure you get better input impedance with digital, like fluke 8842A and hp3478a meters?

Unfortunately no, the standard in bench dmms is high impedance below 10 or 30V, like 10G, and then 10Meg and up to 1000V only, for the 3478A, 34401A, 3458A, etc...  I'd prefer to have a higher flat input R and up to a bit more voltage like 1500 or 2000V.
4.5 or 5.5 digits mean nothing when just probing causes a 30% change in the signal. I understand that oscilloscopes need to keep input Z low, but never got why the standard for DMMs is only 10M, when compensation is not needed.
« Last Edit: November 11, 2018, 01:27:38 pm by MasterTech »
 

Offline URI

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Re: What did you buy today? Post your latest purchase!
« Reply #7780 on: November 13, 2018, 06:37:55 am »
Ups, nearly hit the "buy now" for a Fluke PM6681 universal counter on *bay without thinking.
Managed to check the feedback profile first as fast as I could and then hit "buy now":
In fully working order and overall very good shape for $260 including shipping and customs I couldn't stand it.   :)

Now waiting for it being transported from the US to Germany..   :scared:    :-DD
« Last Edit: November 13, 2018, 07:35:03 am by URI »
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Offline Kjelt

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Re: What did you buy today? Post your latest purchase!
« Reply #7781 on: November 13, 2018, 07:58:58 am »
Just noticed a folded paper that was beneath the meter, can't believe they made each scale unique for each instrument, now I get why it is so accurate.
Actually quite clever, do not design the electronics with expensive high accuracy components, just adjust the readout meter.
Could be something we can re-use in this century as well if we make "intelligent" meters.
It just has to display the correct value for the incorrect internal output.
 

Offline HackedFridgeMagnet

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Re: What did you buy today? Post your latest purchase!
« Reply #7782 on: November 13, 2018, 08:07:03 am »
Not for me but for work. I would rather pay off the mortgage.



https://www.keysight.com/en/pdx-2747128-pn-PA2203A/integravision-power-analyzer-4-channels-3-phase-ac?cc=AU&lc=eng

I hope it's as good as it sounds!

Anyone used one?
 

Offline gamalot

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Re: What did you buy today? Post your latest purchase!
« Reply #7783 on: November 13, 2018, 08:10:31 am »
Two 7" capacitive touch screen TFT LCD modules for my Raspberry Pi.  ;D

 

Offline Kjelt

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Re: What did you buy today? Post your latest purchase!
« Reply #7784 on: November 13, 2018, 08:55:54 am »
Two 7" capacitive touch screen TFT LCD modules for my Raspberry Pi.  ;D
They look nice, what is the price and source ?
 

Offline gamalot

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Re: What did you buy today? Post your latest purchase!
« Reply #7785 on: November 13, 2018, 11:54:39 am »
Two 7" capacitive touch screen TFT LCD modules for my Raspberry Pi.  ;D
They look nice, what is the price and source ?

hummm, they were about 230CNY/pc, do you read Chinese?

https://www.86daigou.com/item/534634137044.html
 

Online Specmaster

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Re: What did you buy today? Post your latest purchase!
« Reply #7786 on: November 13, 2018, 12:33:24 pm »
Two 7" capacitive touch screen TFT LCD modules for my Raspberry Pi.  ;D
They look nice, what is the price and source ?

hummm, they were about 230CNY/pc, do you read Chinese?

https://www.86daigou.com/item/534634137044.html

Yep, its $27.29 AUD
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Offline aargee

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Re: What did you buy today? Post your latest purchase!
« Reply #7787 on: November 14, 2018, 11:28:13 pm »
A case of the right place at the right time... Bunnings Warehouse (Hardware retailer here in Aus) had a clearance rack of light bulbs, huge haul of LED bulbs for family everything $2 a piece  e.g. Pack of 3 x  10.5W LED bulbs for $2
Looks like it was to make room for new releases of the same product  :-//.

The stock supply was all devastated within a few hours, apparently some electrician came in and offered to buy whatever was left...

BTW it is really hard (impossible?) to find LED bulbs rated for enclosed light fittings.

Not easy, not hard, just need to be incentivised.
 

Offline GreyWoolfe

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Re: What did you buy today? Post your latest purchase!
« Reply #7788 on: November 15, 2018, 02:14:06 am »
I got to treat myself to a Donagen AL-S1 Optivisor headband magnifier with 4 different lenses.  It will be nice to get rid of my old, cheep, scratched up magnifier.
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Offline technix

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Re: What did you buy today? Post your latest purchase!
« Reply #7789 on: November 15, 2018, 03:06:53 am »
A case of the right place at the right time... Bunnings Warehouse (Hardware retailer here in Aus) had a clearance rack of light bulbs, huge haul of LED bulbs for family everything $2 a piece  e.g. Pack of 3 x  10.5W LED bulbs for $2
Looks like it was to make room for new releases of the same product  :-//.

The stock supply was all devastated within a few hours, apparently some electrician came in and offered to buy whatever was left...

BTW it is really hard (impossible?) to find LED bulbs rated for enclosed light fittings.
LED's don't give out much heat in the first place, so it is likely they don't need a specific rating for enclosed fittings.
 

Offline sleemanj

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Re: What did you buy today? Post your latest purchase!
« Reply #7790 on: November 15, 2018, 06:54:12 am »
LED's don't give out much heat in the first place, so it is likely they don't need a specific rating for enclosed fittings.

Err.. LED lighting gives out plenty of heat, that is the main killer of LEDs, insufficient cooling, be it passive or active.  It's unlikely to cause a fire, but putting most leds in an enclosed space will almost certainly dramatically hasten it's failure.

LEDs are more efficient than other forms of lighting, and I can run faster than a one legged man in an ice storm... neither is anything to brag about.

~~~
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Offline beanflying

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Re: What did you buy today? Post your latest purchase!
« Reply #7791 on: November 15, 2018, 07:23:48 am »
I have just made a few enclosed 3D printed lamp shades (faceted sealed 8" Balls), fitted them with 4W filament style lamps to keep the heat down. So Far So Good even using PLA  ;D
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Offline TERRA Operative

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Re: What did you buy today? Post your latest purchase!
« Reply #7792 on: November 15, 2018, 01:43:20 pm »
Another score from Yahoo Auctions Japan.

A HP 5340A, hoping it's a nixie version but the LED display version would be fine. Now to find a service manual...

Pic is from the auction that I just won tonight. :)
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Offline Terry01

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Re: What did you buy today? Post your latest purchase!
« Reply #7793 on: November 15, 2018, 01:52:39 pm »
So I pulled the trigger on a 121GW today! I've been swithering for ages and just thought "f*($ it", today i'm getting 1!  >:D

We'll se how I go with it and i'll report back in a few days when I get it how I go with it.


« Last Edit: November 16, 2018, 01:20:32 am by Terry01 »
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Offline Shock

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Re: What did you buy today? Post your latest purchase!
« Reply #7794 on: November 15, 2018, 02:20:54 pm »
A case of the right place at the right time... Bunnings Warehouse (Hardware retailer here in Aus) had a clearance rack of light bulbs

Well done, I replaced mine and brought extras when they were about $3-4 which was about 50% off or so. But a 3 pack for $2 that is a score. The new ones I saw were warm/white switchable but waste of money and more things to go wrong.

I've noticed no failures so far since I've had these. If you want you stretch your $2 you can always choose to repair as well :D.
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Online blueskull

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Re: What did you buy today? Post your latest purchase!
« Reply #7795 on: November 15, 2018, 11:57:13 pm »
A Sanwa PM300 and 2 packs of uSleeve. Last time I ordered a pack of uSleeve, USPS got it lost.
This time with DHL, and so far DHL has not lost a single package for me among tens of packages, from $6000 scope to $20 PCB.
 

Online rsjsouza

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Re: What did you buy today? Post your latest purchase!
« Reply #7796 on: November 16, 2018, 12:48:41 am »
A Sanwa PM300 and 2 packs of uSleeve. Last time I ordered a pack of uSleeve, USPS got it lost.
This time with DHL, and so far DHL has not lost a single package for me among tens of packages, from $6000 scope to $20 PCB.
Congrats, blueskull. The PM300 is a nifty meter - its only issue for me is the absence of some sort of tilting bail. I am always having to find something to keep in at an angle.
« Last Edit: November 17, 2018, 02:06:37 am by rsjsouza »
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Offline med6753

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Re: What did you buy today? Post your latest purchase!
« Reply #7797 on: November 16, 2018, 05:43:16 pm »
Siglent SD3055 5.5 digit bench DMM

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Offline vinito

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Re: What did you buy today? Post your latest purchase!
« Reply #7798 on: November 17, 2018, 01:02:09 am »
Received one of these today:


Ordered one of these two hours later:


Also got on a waiting list for one of these:


Help!!!  :scared:  I am an ignorant rookie and may or may not even use this stuff much, though my interest and free time are both increasing so hope to learn a bunch of new stuff this next year.

Oh, and for good measure I picked up one of these too:


THIS I'll be able to use for sure, but all this stuff adds up eh? Fortunately I'm old and there isn't anybody left to buy Christmas presents for, so there's that. Oh yea! I have to get something cool for myself closer to Christmas too! My poor wallet. :o
 

Offline bitseeker

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Re: What did you buy today? Post your latest purchase!
« Reply #7799 on: November 17, 2018, 01:23:37 am »
Nice Thanksgiving presents, vinito! Yes, they do add up, but don't worry, there's plenty more goodies to get. You'll see as you hang around here. ;D
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