Eakins HDMI Microscope

Discussion in 'Electronics & Electrics' started by Mjollnir, Dec 28, 2020.

  1. Mjollnir

    Mjollnir Member

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    Not really intended to be a full blown review, but recently I got an Eakins Digital Microscope from Aliexpress and the results are mindblowing

    Ordered from Eakins Store on Aliexpress, 100X C mount with 38MP Panasonic sensor. All up was around $240 and took around bit over a week to arrive. Mainly i found this model was the best compromise between full set of features

    - SD card video and photo recording
    - Japanese CMOS sensor
    - 100X zoom (180X is overkill/useless for electronics)
    - Budget under $250.

    https://www.aliexpress.com/item/32978628017.html

    Been messing with it and took some photos and videos, (dont mind the dodgy soldering)
    https://imgur.com/a/rIoBt0h
    https://imgur.com/a/2sVGvHZ (these are 0603 SMD LEDs)

     
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  2. brokenback

    brokenback Member

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    I was watching the eakins with interest ever since EEVblog did a comparison between one he used (~$500) and a Tagarno microscope. ...around $2000. The Eakins was better in auto focus, DOF ...almost everything.

    I'm using a cheap Andonstar ADSM302....it works ok and was cheap (~$220 AUD) but its DOF and frame rate is slightly not good enough. Although I can angle PCBs to view a better DOF. It does have a great working height. Although still looking to adapt a .5 Barlow.

    The Eakins are impressive much better than mine but more expensive, though they do appears to have dropped in price lately probably depends upon variants. Also the Eakins has spares like barlows/reducers and is far better autofocus and uses commercially available "C" lenses. I like that idea. Generally I use 8X to 3X magnification....sometimes a little more to inspect 144 pin LQFP at .5mm pin pitch. Generally I tack an IC into place at a few pins using high magnification then lower magnification drag solder (lots flux).

    Going to have to pay more attention to the Eakins. Would be nice to have a tilt to view solder joins at a slight angle as I've found this improves the DOF. Thanks

    edit:
    oh yeah I output my images to a 32" monitor.
     
    Last edited: Dec 30, 2020
  3. OP
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    Mjollnir

    Mjollnir Member

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    I had my eyes set on the Eakins, the EEVblog pushed me to make the purchase.

    Mine's only got manual focus, would be nice for auto focus when i tilt boards for difference viewing angels. But it is more than enough for what i need and frequency I use it for.

    Tbh i havent set up my work bench to solder under the microscope, since most of the SMD stuff I can do by eye quite well. Next on the listen on the to do list.
     
  4. arasta

    arasta Member

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    what sort of working height does the eakins setup give you?

    been looking at them but a lot of them have the 180x lens, i was thinking the 130x would be more suitable? (says it has a work distance of 7cm-220mm on its page). just wasnt sure about how the 100x goes for inspecting side of things...
     
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    Mjollnir

    Mjollnir Member

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    100X is more than enough for any electronics you'd ever do. Standard mount is 32cm high, normally i use it for PCBs and its approx 18cm high.
     
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  6. 82pb207.2

    82pb207.2 Member

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    I'm thinking of getting one of these. I'm curious about the camera delay (direct via hdmi) to display the image on the monitor ?

    e.g. put a millisecond stopwatch (phone app like "scientific stopwatch" on ios) under the camera.
    Take a photo that captures the stopwatch time on monitor and actual stopwatch time.
    The difference in times in photo should be the delay.
     
  7. brokenback

    brokenback Member

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    ok I'll give it a shot and do this tomorrow for you but I suspect knowing the time you move it and the display change is coing to complicate it. Then I need to compress the video or load it to a file server

    Ok I do sometimes use it for soldering but rarely I mainly use it to inspect . I can do LQFP144 drag solder reasonably easily with just a headband magnifier but I inspect it with the digital scope....especially at an angle to the pads/legs to see the fillets.

    More than once....completely missed a leg!

    Of course the right tip and right flux is paramount. I like a gel flux for these but usually use rosin. Its just the rosin needs reapplying before i complete one side. The gel, not so, but its a major PITA to clean away compared to the rosin.

    If you want a good digital scope the eakins one Dave Jones reviewed or if price isn't an option....a Mantis. Of course the std binocular/trinocular scopes like these are ggod wrt to you can get barlows and reducers to increase FL etc....as well as mount a camera.

    Be aware some trinocular are actual binocular and you prism or mirror switch in the camera and thus are not rue trinocular in that you can view and record at the same time.

    https://www.aliexpress.com/item/400...home.smartLeaderboard_512523722.4000052074925

    https://www.aliexpress.com/item/4001038582272.html?spm=a2g0s.9042311.0.0.74c34c4d6FwARQ

    https://www.eevblog.com/forum/blog/...inspection-microscope!/msg1850393/#msg1850393

    https://www.eevblog.com/forum/blog/...croscope-barlow-lenses/msg3535782/#msg3535782

    Ill try get back tomorrow wit ha video test
     
    Last edited: Apr 26, 2021
  8. 82pb207.2

    82pb207.2 Member

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    Thank you. Sorry if not clear in my original post, no need for video , a photo is all that is needed.(below has some examples to what I mean)

    Everything I have been reading on the topic, is that camera's (in general) are suitable for only inspection and latency is usually provided as the reason that they are not suitable for SMD work. Problem is, I don't think I can sneak a binocular or trinocular scope setup past the wife.

    Then I found this thread: https://forum.contextualelectronics.com/t/microscope-recommendation-needed/2831 (specifically posts by charliex)..
    He has the Eakins autofocus camera (looks the same as the one Dave looked at on eevblog) and says he uses more and more for SMD work over his over his trinocular Amscope setup.

    For the Eakins autofocus camera he quoted latency numbers:
    camera -> hdmi -> hdmi capture card in pc -> windows capture 7 subsystem -> opencv process-> to display - has around 0.249ms latency see https://i.imgur.com/bqkBuBM.jpg
    camera -> hdmi (cheap monitor ) https://i.imgur.com/hf1bHZR.jpg has around 101ms latency



    I don't partially want to spend $600 on a camera with autofocus... and thus i'm interested to see if the cheaper Eakins from this thread has similar latency numbers.
     
  9. brokenback

    brokenback Member

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    Ok tried to put iphone stopwatch under scope....the digits are too large to fit...I can only just see the 1/10s mili S and it means nothing as I cannot zoom out enough. 150mm working height

    Sorry a non digital stopwatch might be better bet...meh haven't seen one in years

    You may be best to get an amscope as depth of field and binocular vision is much better
     
    Last edited: Apr 27, 2021
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    Mjollnir

    Mjollnir Member

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    IMG_20210427_220307.jpg IMG_20210427_220326.jpg IMG_20210427_220351.jpg

    Just under 100ms overall including monitor + microscope
     
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  11. 82pb207.2

    82pb207.2 Member

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    Mjollnir and brokenback thank you for all your help.

    The camera looks promising and I think i'll pull the trigger and get one of these. If it doesn't work out for my use case, i will still have it as an inspection camera. Very much appreciated.
     
  12. brokenback

    brokenback Member

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    That Eakins has far better working distance and FOV than my ADSM302. I could barely fit the last 2 digits from an Iphone stopwatch....guess I should have purchased the Eakins
     

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