Author Topic: EEVblog #1209 - Mailbag  (Read 2472 times)

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Online EEVblog

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EEVblog #1209 - Mailbag
« on: May 07, 2019, 04:21:51 am »
Mailbag time!



SPOILERS:
Aliens!
Northside service company:
https://www.youtube.com/channel/UCcMN_sDzaDThDYRBb2Qcahw/featured
Nutone intercom system teardown
10:08 Royal Digital Diary Teardown
12:52 Motic / Swift soldering stereo microscope, also rebadged by AmScope
25:03 Texas Hold'em handheld game Teardown
TI 30-XS Calculator teardown
31:43 Elecrow Crowtail STEAM Edu Kit for Micro:bit
36:28 CrowVi USB-C monitor: https://www.elecrow.com/crowvi-13-3inch-portable-usb-c-monitor-non-touchscreen.html
 

Online blueskull

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Re: EEVblog #1209 - Mailbag
« Reply #1 on: May 07, 2019, 04:59:24 am »
The monitor only displays over USB-C if it supports DP alternate mode.

If you plug it into a modern laptop, it will work.
If you plug it into an Nvidia VR-enabled RTX card, it will work.
If you plug it into a desktop PC with iGPU and native USB-C, it will work.
If you plug it into any computer with full Thunderbot Thunderbloat 3, it will work.
If you plug it into any PC through a USB-A to USB-C adapter, it will NOT work.

BTW, nice showcase of the monitor. I was looking for one, and you just helped me find what I'm buying.
« Last Edit: May 07, 2019, 06:49:27 am by blueskull »
 

Offline T3sl4co1l

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Re: EEVblog #1209 - Mailbag
« Reply #2 on: May 07, 2019, 06:31:37 am »
If you plug it into any computer with full Thunderbot 3, it will work.

Completely unrelated, and not to draw attention to a typo, but I'm reminded of a similar mistake seen in older Microsemi datasheets.  Some of their MOSFETs got branded "Thunderblot". :-DD

Tim
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Electronic design, from concept to prototype.
Bringing a project to life?  Send me a message!
 
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Offline Psi

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Re: EEVblog #1209 - Mailbag
« Reply #3 on: May 07, 2019, 07:36:36 am »
For that price your better off spending $2 more and getting the more common 7-45x  simul-focus trinocular stereo microscope.

- Adjustable zoom knob (much easier than changing objectives)
- Comes with two sets of objectives 10x and 20x
- Comes with 2x and 0.5 barlow lens to give you 3.5x to 180x
- Has trinocular port which is simul-focus.
- Similar working distance when using 0.5 barlow  (175mm)
https://www.aliexpress.com/store/product/Lucky-Zoom-3-5X-180X-Simul-Focal-Trinocular-Stereo-Microscope-WF20X-Eyepiece-Microscope-For-Soldering-2/300856_32956875343.html

Only disadvantages are
- The stand is less open and adjustable
- Doesn't come with led light.

You can get a better stand, just have to pay a little more.
microscope LED ring lights are like $15.
« Last Edit: May 07, 2019, 07:43:43 am by Psi »
Greek letter 'Psi' (not Pounds per Square Inch)
 

Offline hwj-d

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Re: EEVblog #1209 - Mailbag
« Reply #4 on: May 07, 2019, 02:54:58 pm »
I wonder, what customs and import taxes are calculated, or does that work somehow without?
The german goverment has fired his own nation and all his citizens
 

Offline G7PSK

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Re: EEVblog #1209 - Mailbag
« Reply #5 on: May 07, 2019, 04:04:50 pm »
I have the AmScope branded microscope had about 9 month now, only came with one LED light but cannot fault it for what I need or want, I have found that the 5 times lenses are not powerfull enough fo me without my glasses on ann with them on the field of view is far to narrow so I just use the ten times.
 

Offline Electronoooob

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Re: EEVblog #1209 - Mailbag
« Reply #6 on: May 07, 2019, 04:13:14 pm »
Awesome just purchased the Microscope. :D
 

Offline McBryce

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Re: EEVblog #1209 - Mailbag
« Reply #7 on: May 07, 2019, 05:30:50 pm »
That Microscope is also sold in Europe under the name Bresser Biorit ICD. I've had one for years and I wouldn't swap it for anything. The Bresser scope also originally had a single light on the head (which I later replaced with an LED Ringlight), so there's a hole in the right place to add a camera. I've mounted an Andonstar USB scope through the hole. The old version also had a real transformer in the base, making it even heavier.

It costs slightly more in Euroland: https://www.ebay.de/itm/BRESSER-Biorit-ICD-CS-Stereomikroskop-LED-Mikroskop-Loten-SMD-Schwanenhals/352648838145

McBryce.
 

Offline Electronoooob

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Re: EEVblog #1209 - Mailbag
« Reply #8 on: May 07, 2019, 05:39:05 pm »
I want to do board repair but now worried that a fixed magnification scope was a bad decision. Macbook logic boards specifically.

 

Offline McBryce

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Re: EEVblog #1209 - Mailbag
« Reply #9 on: May 07, 2019, 05:58:50 pm »
I do similar work all the time with that microscope. I have 5x, 10x 15x and 20x eye-pieces for it, depending on what I'm doing. The 20x are too high magnification though, so they never get used, unless you need to look at a single solder joint of an 0201 component.

McBryce.
 
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Offline Electronoooob

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Re: EEVblog #1209 - Mailbag
« Reply #10 on: May 07, 2019, 06:00:33 pm »
Thank you for your insight and experience!
 

Offline NiHaoMike

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Re: EEVblog #1209 - Mailbag
« Reply #11 on: May 07, 2019, 08:12:18 pm »
The monitor only displays over USB-C if it supports DP alternate mode.

If you plug it into a modern laptop, it will work.
If you plug it into an Nvidia VR-enabled RTX card, it will work.
If you plug it into a desktop PC with iGPU and native USB-C, it will work.
If you plug it into any computer with full Thunderbot Thunderbloat 3, it will work.
If you plug it into any PC through a USB-A to USB-C adapter, it will NOT work.

BTW, nice showcase of the monitor. I was looking for one, and you just helped me find what I'm buying.
Couldn't it be possible to make an active adapter to adapt one of those monitors to standard USB + DP?
Cryptocurrency has taught me to love math and at the same time be baffled by it.

Cryptocurrency lesson 0: Altcoins and Bitcoin are not the same thing.
 

Offline ericloewe

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Re: EEVblog #1209 - Mailbag
« Reply #12 on: May 07, 2019, 09:07:20 pm »
The monitor only displays over USB-C if it supports DP alternate mode.

If you plug it into a modern laptop, it will work.
If you plug it into an Nvidia VR-enabled RTX card, it will work.
If you plug it into a desktop PC with iGPU and native USB-C, it will work.
If you plug it into any computer with full Thunderbot Thunderbloat 3, it will work.
If you plug it into any PC through a USB-A to USB-C adapter, it will NOT work.

BTW, nice showcase of the monitor. I was looking for one, and you just helped me find what I'm buying.
Couldn't it be possible to make an active adapter to adapt one of those monitors to standard USB + DP?
Should be possible, but there was no such thing available last time I checked (which was 1-2 years ago by now). The closest thing out there is that some Asus portable monitors can operate as DP monitors using the alternate mode or as a DisplayLink monitor, which is a plain USB device that needs a driver to pass the graphics via the USB connection.
 

Offline SteveyG

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Re: EEVblog #1209 - Mailbag
« Reply #13 on: May 08, 2019, 05:48:10 am »
This microscope is really nice. They sent one over to my channel too for review.
They do actually have the product on the Amazon.com site for US viewers too:

Amazon.co.uk Link: https://amzn.to/2GYGYFV
Amazon.com Link: https://amzn.to/2YwFWYX
« Last Edit: May 15, 2019, 09:58:02 am by SteveyG »
 
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Offline SteveyG

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Re: EEVblog #1209 - Mailbag
« Reply #14 on: May 08, 2019, 05:51:32 am »
For that price your better off spending $2 more and getting the more common 7-45x  simul-focus trinocular stereo microscope.

- Adjustable zoom knob (much easier than changing objectives)
- Comes with two sets of objectives 10x and 20x
- Comes with 2x and 0.5 barlow lens to give you 3.5x to 180x
- Has trinocular port which is simul-focus.
- Similar working distance when using 0.5 barlow  (175mm)
https://www.aliexpress.com/store/product/Lucky-Zoom-3-5X-180X-Simul-Focal-Trinocular-Stereo-Microscope-WF20X-Eyepiece-Microscope-For-Soldering-2/300856_32956875343.html

Only disadvantages are
- The stand is less open and adjustable
- Doesn't come with led light.

You can get a better stand, just have to pay a little more.
microscope LED ring lights are like $15.

I disagree. They are designed for different purposes - the stand is next to useless for electronics work so you will end up spending a fair chunk on a new stand and shipping - when I looked, you'd spend £150-300 on a stand with shipping and import so not worthwhile. The "fixed" magnification is not really a hindrance.

Online blueskull

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Re: EEVblog #1209 - Mailbag
« Reply #15 on: May 08, 2019, 05:57:13 am »
Couldn't it be possible to make an active adapter to adapt one of those monitors to standard USB + DP?

If you find some, let me know!

I wouldn't buy this one if I could find an adapter for my Asus MB16AC.
 

Offline artag

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Re: EEVblog #1209 - Mailbag
« Reply #16 on: May 08, 2019, 09:57:56 am »
I've often seen an LED used as a shunt regulator with a solar cell calculator, Casio too.
Maybe the split PCB is to allow a small dual-sided pcb and a larger single-sided keyboard PCB. Lower PCB cost but extra assembly cost.
 

Offline artag

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Re: EEVblog #1209 - Mailbag
« Reply #17 on: May 08, 2019, 10:14:44 am »
For that price your better off spending $2 more and getting the more common 7-45x  simul-focus trinocular stereo microscope.


That certainly looks like a more modern design. But the long-reach stand is important to get the best out of the scope, I'd regard it as essential if you're trying to set up a good work bench.
 

Offline NivagSwerdna

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Re: EEVblog #1209 - Mailbag
« Reply #18 on: May 08, 2019, 10:34:28 am »
The reviewed (product placed) Microscope is nice and very like my https://www.microglobe.co.uk/zenith-stl-80-x10x20-long-arm-stereoscopic-microscope-p-8276.html? which I bought a few years ago...
... however in retrospect I think I would have been a bit better off with zoom... and trinocular would have been nice too.
 

Offline Kleinstein

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Re: EEVblog #1209 - Mailbag
« Reply #19 on: May 08, 2019, 03:22:36 pm »
LEDs are quite common for voltage clamping in solar powered calculators.

The LED might even outperform a 2 V zener.
 

Offline jancumps

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Re: EEVblog #1209 - Mailbag
« Reply #20 on: May 08, 2019, 03:26:29 pm »
I want to do board repair but now worried that a fixed magnification scope was a bad decision. Macbook logic boards specifically.
Buyers remorse in less than 2 hours :)
 

Offline NivagSwerdna

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Re: EEVblog #1209 - Mailbag
« Reply #21 on: May 08, 2019, 04:03:21 pm »
I want to do board repair but now worried that a fixed magnification scope was a bad decision. Macbook logic boards specifically.
Buyers remorse in less than 2 hours :)
I love mine... I'm sure they will love theirs too.  Don't know about the reviewed microscope but it looks very similar to mine and as shown on the video you can get a crystal clear view... I have dodgy aging old eyes and SMD is a joy when using it.  If I was professional/richer I would definitely trade up though.
I recommend a 4CH oscilloscope to Electronoooob though!
« Last Edit: May 08, 2019, 04:10:56 pm by NivagSwerdna »
 
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Offline Electronoooob

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Re: EEVblog #1209 - Mailbag
« Reply #22 on: May 08, 2019, 04:38:40 pm »
Thanks folks

I do have 4 channel oscilloscope :D I'm certain you can guess the model.

Apparently the microscope will arrive tomorrow at some point, I really hope I like it. I'm more anxious than excited now though lol

At least it's amazon so returning should be easy enough if there's a problem.



Sent from my CLT-L09 using Tapatalk

 
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Offline SteveyG

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Re: EEVblog #1209 - Mailbag
« Reply #23 on: May 08, 2019, 08:13:12 pm »
Thanks folks

I do have 4 channel oscilloscope :D I'm certain you can guess the model.

Apparently the microscope will arrive tomorrow at some point, I really hope I like it. I'm more anxious than excited now though lol

At least it's amazon so returning should be easy enough if there's a problem.


I honestly think you'll be happy with it. I've just spent the evening using mine instead of my new Amscope SM-4TPZ - it is far less bulky and obtrusive.

Image quality is crystal clear through the eyepieces:

https://youtu.be/0hHRV0wV34E
« Last Edit: May 08, 2019, 08:15:06 pm by SteveyG »
 
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Online blueskull

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Re: EEVblog #1209 - Mailbag
« Reply #24 on: May 10, 2019, 03:26:05 am »
I received the Elecrow 15.6" FHD touchscreen.

And my rant began here:

1. Bad building quality. The back panel has some burrs, and the vinyl patterned cover has bumps, presumably from dust and other small contaminants being stuck between the substrate and the patterned vinyl tape.
2. Bad cover design. It collapses with the slightest force applied to the screen. It should be previously designed for non-touch models, and just directly used on touch models.
3. Bad mechanical design. There are no force absorption materials on the backside of the LCD panel. If I grab the monitor by its upper back side, two ridges (presumably internal cables) can be seen on the screen as pressure marks.
4. Bad reflection. The front cover glass is not coated, which means a coated, preferably matte, screen protector is absolutely necessary in a bright room. I believe the non-touch version does not have this cover glass, and the LCD panel is matte.
5. Bad workmanship. The brushed aluminum panel came with two scratches straight from the factory.
6. Bad shipping. DHL is fast, and it does indeed come in one piece. But do they really have to save that additional cent? They ran out of large cardboard boxes, and they literally cut and taped two smaller cardboard boxes together |O. Padding is minimal, but to their credit, the inner box does have some level of protection.

Keep in mind that this is not cheap. This is a $300 15.6" FHD touch screen. I can buy a same sized laptop with touch for $450 from HP/Dell/Lenovo, and that comes with a complete computer in it.

Besides touch, the only advantage it has is a wider viewing angle, compared with my Asus MB16AC. Despite being IPS, the Asus has a very bad viewing angle. Unlike TN, it does not distort colors, instead it reduces brightness. This monitor has a higher brightness and wider angle, plus I need touch. Otherwise I would go for another Asus.

TLDR: If you are after a portable monitor with no particular favor on bring touchscreen or not, I would recommend the Asus MB16 series. AC model takes USB-C and USB-C only input, older models take mini HDMI input. Pick what you need, and don't waste money on Elecrow unless you need the touch function.
 


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