Author Topic: What did you buy today? Post your latest purchase!  (Read 2756151 times)

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Offline lukego

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Re: What did you buy today? Post your latest purchase!
« Reply #9925 on: October 18, 2020, 08:42:10 am »
LCR Research Pro1 Plus smart tweezers.

I'm doing hand assembly of SMT boards with ~100 element BOM and I'm hoping this will get me into the habit of checking for misplaced parts routinely and immediately when a doubt crosses my mind.
 
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Online tautech

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Re: What did you buy today? Post your latest purchase!
« Reply #9926 on: October 18, 2020, 08:51:25 am »
LCR Research Pro1 Plus smart tweezers.

I'm doing hand assembly of SMT boards with ~100 element BOM and I'm hoping this will get me into the habit of checking for misplaced parts routinely and immediately when a doubt crosses my mind.
Congrats, you'll love them in no time !
Don't think they're only limited to SMD usage.  ;)
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Offline bingo600

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Re: What did you buy today? Post your latest purchase!
« Reply #9927 on: October 20, 2020, 06:31:33 pm »
A lot of these "Bulgin Source  12-1.7-10"  - 12v 1.7A linear PSU's  (NOS) $4/pcs

Seems like Power One IHB12-1.7 clones , but not 100%

Now for playing w. some OXCO's

Edit: Does anyone have some info about this PSU

Edit2: TDK-Lambda HSB12-1.7  looks 100% the same  (H series)
https://sg.rs-online.com/web/p/embedded-linear-power-supplies/1731626/

/Bingo
« Last Edit: October 20, 2020, 07:01:24 pm by bingo600 »
 

Offline rdl

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Re: What did you buy today? Post your latest purchase!
« Reply #9928 on: October 20, 2020, 10:12:26 pm »
Just ordered one of these. Have some computers that are overdue for cleaning and I'm not buying any more canned air. The Metro Datavac is maybe a bit better, but this one is much cheaper and seemed worth taking a chance on.



https://www.amazon.com/dp/B01BI4UQK0/
 

Offline Jay_Diddy_B

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Re: What did you buy today? Post your latest purchase!
« Reply #9929 on: October 21, 2020, 03:17:54 am »
A lot of these "Bulgin Source  12-1.7-10"  - 12v 1.7A linear PSU's  (NOS) $4/pcs

Seems like Power One IHB12-1.7 clones , but not 100%

Now for playing w. some OXCO's

Edit: Does anyone have some info about this PSU

Edit2: TDK-Lambda HSB12-1.7  looks 100% the same  (H series)
https://sg.rs-online.com/web/p/embedded-linear-power-supplies/1731626/

/Bingo

These kind of linear supplies used to be very common. Many companies made them. You will probably find an LM723 or equivalent on the board. The main chip could be marked with a special number. They all had a similar form factor.

They should be reasonably good.

Jay_Diddy_B
 

Offline bingo600

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Re: What did you buy today? Post your latest purchase!
« Reply #9930 on: October 21, 2020, 05:00:50 am »
These kind of linear supplies used to be very common. Many companies made them. You will probably find an LM723 or equivalent on the board. The main chip could be marked with a special number. They all had a similar form factor.

Yepp

ua723 + 2N3055 + driver transistor , 2 pot's (Imax ?? + Vreg), and Vout + Sense .
Only strange thing is that i can only find two rectifier diodes , not four. Wouldn't that add to the ripple & less effeciency.

/Bingo
« Last Edit: October 21, 2020, 05:02:55 am by bingo600 »
 

Online vk6zgo

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Re: What did you buy today? Post your latest purchase!
« Reply #9931 on: October 21, 2020, 07:35:57 am »
These kind of linear supplies used to be very common. Many companies made them. You will probably find an LM723 or equivalent on the board. The main chip could be marked with a special number. They all had a similar form factor.

Yepp

ua723 + 2N3055 + driver transistor , 2 pot's (Imax ?? + Vreg), and Vout + Sense .
Only strange thing is that i can only find two rectifier diodes , not four. Wouldn't that add to the ripple & less effeciency.

/Bingo

Two rectifiers suggest it is an old style "fullwave rectifier".

These use a centre tapped secondary on the  transformer with each half winding producing the full ac voltage needed to produce the DC output you want.
On each alternate half cycle one diode of the pair conducts, so it is still full wave rectification.

These were common in tube rectifier times, as it was cheaper to wind the transformer with a centre tap than to use four rectifiers.
With solid state rectifiers  it is usually cheaper to use four rectifiers with an untapped secondary winding.

In some special cases, like if a manufacturer makes, say both 12v & 24v supplies, the same transformer could be used in both cases, with a "full wave rectifier" for 12v , & a "bridge" rectifier for 24v.
The saving in inventory costs may justify the cost of the tapped secondary.
 
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Offline bingo600

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Re: What did you buy today? Post your latest purchase!
« Reply #9932 on: October 21, 2020, 09:12:42 am »
Two rectifiers suggest it is an old style "fullwave rectifier".

These use a centre tapped secondary on the  transformer with each half winding producing the full ac voltage needed to produce the DC output you want.
On each alternate half cycle one diode of the pair conducts, so it is still full wave rectification.

That seems very likely as there's 3 secondary taps.

Thank you for that insight  :-+

/Bingo
 

Offline 4cx10000

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Re: What did you buy today? Post your latest purchase!
« Reply #9933 on: October 21, 2020, 11:43:30 am »
$20 for this Motech MT 4080A  :)
 
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Offline PlainName

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Re: What did you buy today? Post your latest purchase!
« Reply #9934 on: October 21, 2020, 12:10:47 pm »
Quote
It arrived within 90 minutes

I thought we were spoiled by Amazon same-day, but that's quite something!
 

Offline BravoV

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Re: What did you buy today? Post your latest purchase!
« Reply #9935 on: October 21, 2020, 12:17:02 pm »
Quote
It arrived within 90 minutes

I thought we were spoiled by Amazon same-day, but that's quite something!

He lives in Shenzhen.

Offline mansaxel

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Re: What did you buy today? Post your latest purchase!
« Reply #9936 on: October 21, 2020, 12:56:20 pm »
An Avometer Model 7, Mark 1 (I guess; it lacks the Mark 2 features), made November 1950. It is in almost perfect condition, bar some rust in the battery bay, and binding posts miss some parts. I need to verify function on all ranges. The movement is free and responds to stimulus.

Most important: It won't get turned into a lamp holder.  Pic from ad:


Offline RoadRunner

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Re: What did you buy today? Post your latest purchase!
« Reply #9937 on: October 21, 2020, 01:14:54 pm »
$20 for this Motech MT 4080A  :)
How and Where? :scared:
 

Offline Zucca

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Re: What did you buy today? Post your latest purchase!
« Reply #9938 on: October 21, 2020, 02:35:50 pm »
Just ordered a DSLogic Pro 16-ch version.

Temped now, can you also generate JTAG traffic or it is just for watching it?
« Last Edit: October 21, 2020, 02:37:32 pm by Zucca »
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Offline MarkL

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Re: What did you buy today? Post your latest purchase!
« Reply #9939 on: October 21, 2020, 03:40:24 pm »
$20 for this Motech MT 4080A  :)
Wow - awesome catch!

The Motech MT-4080A/D is re-badged and sold by B&K Precision as the 886 and 885 LCR meters.  (For a lot more than $20!)  There's schematics, calibration, and other service information posted in this thread for the 885/886:

  https://www.eevblog.com/forum/repair/identify-theses-masked-buffed-ics-need-search-detectives-gurus/msg2579427/#msg2579427

FYI.
 
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Online Nominal Animal

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Re: What did you buy today? Post your latest purchase!
« Reply #9940 on: October 21, 2020, 04:49:00 pm »
Just ordered a DSLogic Pro 16-ch version. Need to work on some JTAG devices and don't have the time to write decoder plugin for my AD2. Delivery is due in 150 minutes.
The software is intuitive, and works just right out of the box.
DSView is Sigrok-derivative, and both are licensed under GPL.

FWIW, the under $10 MCU123 and Saleae Logic clones on fleabay work fine with Sigrok, and use Sigrok's own fx2lafw firmware – so the only thing "Saleae" on it is the sticker on top; the design itself is almost straight off Cypress FX2 application notes, and you won't be infringing on anyones intellectual property if you rip the sticker off.  These are based on Cypress FX2, and limited to 24 MHz sample rate and 8 channels, but for hobbyists working on Arduino-like stuff (serial, SPI, I2C, WS2811/WS2812B/APA102 etc.), can be very useful.
 

Online SiliconWizard

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Re: What did you buy today? Post your latest purchase!
« Reply #9941 on: October 21, 2020, 04:57:01 pm »
I also have Bought a DSLogic Pro a few months ago, and it's a great tool.
Be aware that those relatively low-cost analyzers are fine for "low-frequency" logic, but useless for anything above ~50 MHz (clock rate). So don't expect to be able to use them to capture like 100 MHz+ digital signals for your FPGA design, for instance.
 

Offline Ed.Kloonk

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Re: What did you buy today? Post your latest purchase!
« Reply #9942 on: October 21, 2020, 11:04:26 pm »
Quote
It arrived within 90 minutes

I thought we were spoiled by Amazon same-day, but that's quite something!

He lives in Shenzhen.

The last package I got from there took 90 days to get here.

 :(
iratus parum formica
 

Offline PlainName

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Re: What did you buy today? Post your latest purchase!
« Reply #9943 on: October 22, 2020, 12:10:33 am »
Quote
He lives in Shenzhen.

Sure, but it'd take me that long to walk down the local shop to get some milk.
« Last Edit: October 22, 2020, 12:12:36 am by dunkemhigh »
 

Offline maginnovision

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Re: What did you buy today? Post your latest purchase!
« Reply #9944 on: October 22, 2020, 03:20:40 am »
I bought a Note 20 Ultra because my old Razer Phone 2 came apart when the battery became very large all of a sudden.
 

Offline BravoV

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Re: What did you buy today? Post your latest purchase!
« Reply #9945 on: October 22, 2020, 05:56:15 am »
Sure, but it'd take me that long to walk down the local shop to get some milk.

I ACTUALLY used food delivery service (meituan.com) to deliver this thing. They also offer goods running service at a cost higher than their food running service, but they do offer that.

DreamSource Technology is only 26 km from my company, so it's a relatively short trip and it only took 1.5 hours because the driver had to pick up and deliver more goods on the trip here.

In most Asia developing countries, motor cycle ride for hire are plenty and norm, like food delivery and merchandise delivery too.

Motor cycle is much faster than delivery car/truck in big cities, and online shopping in the same city when opted for shipping with instant delivery, usually they arrived within hours and norm, and with tracking too of the rider's GPS position once they picked up the merchandise.

Offline gamalot

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Re: What did you buy today? Post your latest purchase!
« Reply #9946 on: October 22, 2020, 07:18:21 am »
Two Raspberry Pi cameras, the normal one and the NoIR one.

 :)

Offline Microdoser

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Re: What did you buy today? Post your latest purchase!
« Reply #9947 on: October 22, 2020, 02:02:17 pm »
Just ordered an ATTEN ST-862D Hot Air station.

I have heard that for the money it is a fairly decent hot air station.

Ordered some 45 degree nozzles and soldering tips on top to get free postage.
 

Offline mansaxel

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Re: What did you buy today? Post your latest purchase!
« Reply #9948 on: October 22, 2020, 06:08:40 pm »
A Stornophone 6000, VHF version, with the StrayCat software.

Pic from the auction:


Online Bud

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Re: What did you buy today? Post your latest purchase!
« Reply #9949 on: October 23, 2020, 02:18:33 am »
Bamboo tweezers   :D
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