EEVblog
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- เผยแพร่เมื่อ 1 ส.ค. 2024
- Servicing and cleaning the Olympus BHM microscope and 3D printing a Cree LED replacement
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Welcome David!
Thanks!
Yeaaahhhh... David POWEEEERRR!!!
David is the only other guy that gets my okay as permanent second host besides dave. Great job you two!
Excellent video Dave2, well presented. I hope to see more of you on here!
Great!
More David!
We used to use these type of microscopes on air flotation tables. They were a bugger to get dialed in but it would allow them to be used vibration free.
Hexane is what we were always told to use to clean lenses back when I was in lab, we were told to use this because its virtually non polar and because the carbon-hydrogen bond in special in that it doesn't interact with other materials (something about how its liquid state is maintained almost entirely via van der waals forces), where other commonly used solvents like xylene may be non-polar, but they contain aromatic rings which interact with other materials.
If that microscope was rigid from cam to lens to the specimen table, I don't think it would wobble because - it looks like the cam is moving separate from the wafer -. I'd be checking for play in the cam or specimen table.
Gracias, muy buen trabajo
Well done Dave,well done 👍
Super cool, Dave2 is great on video! Love it!
Great work man. young youtubers unite!
excellent education video by David and Dave -audio input . got to love the LED light bodge Job. it's a hobbyist classic
is to avoid any one off pcb fabrication and just hot glue it. Hot Snot it!
also it just goes to show why, a good consumer 3D printing service is useful for that one off 3D printing job. no everyone needs a 3D printer at home.
In relation to the shacking, if you clamp the sample to the solid microscope stage you'll reduce most of that. Also, in medical research we often have our better microscopes sitting on a 250-750kg stone table top and sometimes these tables will have mechanical dampers built into the legs.
Thumbs up for Dave2 👍
I "Zee" what you did there Dave!
Good video David!
This man is an imposter. I called Olympus. He is NOT a certified Olympus technician.
For the fairness of all involved you should start adding freeze-audio overlays over your own videos too! As a replacement for the stupid removal of annotations...
yes, because making both features available is too much of a choice, and making them available on mobile devices too much of a technical difficulty.
The trick with hex keys is that you need a metric and a imperial set ;)
I used to work as a sound and light tech and we mostly used JBL speakers. You could tell if the speaker was made in USA when it had imperial hex screws :D
Wow! that is so much difference in character with Dave and David. Not that there is anything wrong with David. But...that crazy aussie bloke... :)
Where is part 1? Can you link to it in the description?
Phew, I expected worse, not because of David's performance (well done), but because of Dave making him do vids on "How To Clean". ;D
David, you need to take control of editing next! Ahahaha.... the power. Loving the comedy bench PSU.
Hey! Any chance we can get a link to the 3d printer files for the adapter you've done up? I just got one of these scopes myself and the bulb is missing so I figured I'd attempt your mod! Thanks.
Hi Dave2, Lova ya so far, but I recommend you watch Crocodile Dundee about 30 times in a row. That way you can learn to play up the 'Strailianess we all love!
Cotton will contain microscopic minerals, that will scratch the glass.
I look at cellulose all the time in a SEM, at work. Natural materials
are more contaminated.
3:04 as a Canadian, this was my first thought too
Wished I could see results of before and after the cleaning...
Would it hurt the lens to use an air compressor?
Dave2 - The light levels are kind of bland on this one and shadows increased. You guys rearranging the shop again?
Video is very underexposed
Haha! Yep, That is because I am terrible with cameras.
I use multisurafce /wvinigar windex, and simple green myself. Ajax seemed to be too aggressive.
David's first video. Winner winner chicken dinner!
Is that David's first official channel one video at all? There was the one with the 3D-printer, right?
One thing that came to my mind while I was watching this video was: While you're at hacking the light, wouldn't it be possible to add a mount for lasers, so you could use the scope to measure thicknesses of layers by interferometry? Would such an addition be helpful for analysing ICs or anything?
I know it's a whacky idea, but I guess it would be possible.
Now you just need to build a new workbench with a half ton steel top to get rid of the vibration.
i think he mentioned in the other video when he was using the microscope that the other desk he had it on was screwed down and very solid and yet still saw vibrations
Put the heavy table on suspension.
Dave, Bulbs grow, Lamps glow.
The speeded up video bugged me a bit, I don't mind a bit of waffling. Re, the "dirty" inside of top tube thingy, David's obviously never mucked pigs out or changed a nappy; that's dirty. Not bad for a 1st video David, you need to slow down a bit though. No worries, I know how hard it is to relax when filming yourself.
Nice speed!
The lm317 will drop over 3V in constant current mode. Since the LED needs 3V, this will not regulate with just a 5V power supply. LED gets no where near 300mA.
Exactly. Scanned down the comments expecting lots of people to have raised this but they don't seem to have.
A standard LM317 needs between 1.5 and 2V to maintain regulation at 300mA depending of temperature. Add to that the 1.25V dropped across the current sense resistor and it's 2.75 to 3.25V.
Looks like David needs a bit more practical electronics experience.
Easiest way to check if the the final circuit is regulating is to check the voltage drop over the resistor. It wont be 1.25V if the power supply is too low.
Agreed. Looks like it's just us two commenting on this.
Yup, I concur, I'm not even in the office lol its Sunday. I responded to Graham's comment above.
Nice video. Wouldn't mind more of David.
Watched him doing the plasma TV repair, seems like a fun dude. Is he doing some uni-essay-work at your workshop?
What type of camera's connected to the microscope? usb, vga or hdmi?
its either in the previous video or one of the eevblog2 videos he shows the specific camera used.
Athelstan has returned!
Why would you like allen keys? Do you enjoy carpal tunnel?
why don't you use high CRI LED?
maybe like nichia 219b
that heatsink is probably from the PCH on an intel based motherboard. (if it was from a computer motherboard that is)
Yay! David2!
Dave forgot to say chicken dinner
What? (almost) no Dave? I feel cheated! ;-)
Nice vid Dave 2. would like to see more of this kind of videos.
BTW which was the video where Dave confronted Dave 2 the first time with that evil power supply? Would like to watch it again. Must have been 2 years ago or so?
on the 2nd channel uploaded on Sep 3, 2015
Thanks. That was nice to see again. I wonder how many minutes were cut out from this video figuring out again how that bastard works ;-)
cotton scratch lens ! you should use "Joseph" paper !
I disagree. Industrial grade super clean cotton is generally recommended.
nasal schmoo turns to epoxy over time, eh? will note that down in case I run out...and it's biodegradable ;)
love the new content keep it coming
I'm a Yankee and I still say "Zed".
Why not simply put all the parts inside of a dishwasher altogether with one of these "100% free of streaks" tabs?
I'm American. I've caught myself saying "zed" a few times.
This kinda reminds me of the young David-1 before losing his genuine Aussie accent!
Good to see you back on here David 2.0. Do more vids!
Great video, but you should stay far away from micro USB. You will find great success.
Hi Dave 2. Interesting first official video!
Tiny bit of advice, maybe you could talk a hair slower and pronounce a hair better. That's all.
Just one little thing. Such a fine piece of gear. Does that really deserves only just a botched together current source? :(
I reckon the microscope is dearly offended by the USB current source, yes
It's not really a "USB current source". Just using a USB connector as a source of 5v.
There's also nothing wrong with using an LM317 for this task.
Would you prefer verbosity such as "USB-powered constant current source"?
Who said that there is something 'wrong' with it?
I think the audio volume was too low at some points but overall it was comprehensible - even for a non-native speaker
The drawer unit at 13:27, anyone know where to get a cheap version of that? Maybe Ali Express?
Christopher Stone I got mine in one of my local Hardware Stores (33 Drawers/Unit for 8.99€). The shipping costs from China will ruin the price advantage you get.
Hopefully the first of many
I'd forgotten about the other David. Good job, though. Thumbs up.
3:00 lol :D
Hey a Surface. Has Louis Rossman seen this viedeo? (He doesn't belive that there is such a thing as a Surface in the wild.
Don't you need a part 1 to have a part 2?
I though the operating term on EEVblog was "hot snot"
Looks like David needs a bit more practical electronics experience.
A standard LM317 needs between 1.5 and 2V to maintain regulation at 300mA depending of temperature. Adding the 1.25V dropped across the current sense resistor takes that to 2.75 to 3.25V, leaving a 1.75V max load voltage drop in order to maintain regulation on a 5V supply.
Measuring the current into a short presented by an ammeter isn't going to show the current into the LED dropping 3V.
Hopefully your not trolling and want an actual response.
This was a two birds with one stone solution, if inadequate current (less than 300 mA) achieved sufficient brightness then job done. If not power from an alternate source and get the full 300mA. It was only a few minutes of work for a solution for both scenarios. I probably should have kept more footage, not very good at editing at the moment and I wasn't sure what to keep. In both scenarios the LED is safe from over current. Device is temperature stable at 300mA, building is aircon'd + heatsink sufficent.
If your curious its running at about 50% relative luminous flux (166mA) what it could, at 300mA it would be at about 80%. We didn't yet need the extra brightness, might later, we will see.
I know that the multimeter doesn't include forward voltage of LED or set drop, this is pretty basic and ultimately it didn't matter. It showed that I didn't pick the wrong resistor and that it wasn't open circuit or shorted, it also showed that the LM317 was functional as many were second hand. The test meant that I could be sure that I was indeed protecting the LED from over current for both scenarios.
Thanks for the feedback, would you prefer longer videos with the extra details that fully justify a design decision or more like a project summery?
Why on earth do you think I'm trolling? You made a schoolboy error and I pointed it out. Trying to justify the error does you no favours.
That's "you're" in the third para BTW.
Is 01:41 on the clock.
“Winnuh!”
Us Amuhrikan amateur radio ops use "Zed" !
He is unofficially a Yankee now 😆 🤣
jajaja new flavors to eevblog
Nice video! I appreciate the different style.
How many years did David go to university to end up cleaning a second hand microscope?
Where is "Part 1"?
next to tuv of coarse1
the other video labeled episode 992 maybe...
Part 1?
Ah!
Still confusing tho.
3:03 Dave, come on, that's not fair. Inserting yourself during edits and what-not.
tohopes would be very funny if dave2 did the same thing to dave1 if he got to editing as well. Thumbs up to dave2 being a permanant host. Though saying questioningly Power supply of doom? is there video of why this power supply earned the nickname?
yep, there is a video, gotta go back 6-8 months at least
I just remember it being about power supplies, possibly a review, and then this came in on a tangent, it was about UI simplicity
I appreciate your response but its no problem, it was my idea for him to correct me. Its an Aussie joke, Aussies obsessively will correct you if you pronounce Z "incorrectly". It reckon it was a fun edit :)
I liked the video. I also didn´t mind Dave's voice over. Don´t get me wrong, it wasn´t necessary - but it added even more value. Two heads are better than one.
The voice over was only echoing what I was shouting at my monitor, anyway : )
New number.... Who dis?
Great to see Dave2 in a video; would have been even better if he'd used Fusion 360, instead of onshape though, haha!
Keep being awesome you two!
never clean lenses with a dry cloth, no matter how soft it is. there are lots of small hard particles in that dust that will scratch the lens when you move them around. the only way to do it is with something wet.
Dave 2 knows of Dr. Murphy... wonderful!
Zeeeeeeeeee.... hahaha
Dude!
Do you know how lucky you are to be picked by "The Great Dave Jones" to be his "apprentice"?
Quit thinking "I'm recording what are people gonna think.................?" in the back of your mind
That's killing you!
Get your confidence back!
Speak your mind!
Don't worry what we think!
We are watching to find out what you think! LOL
Quit pausing,studdering,second guessing yourself. I'm not sure but i think the master has said
"GROW A PAIR"
Man you have a great opportunity to do great things!
Relax stop being nervous and speak your mind.......
best wishes..............
well done David.. :)
Dave II, awesome!
can you NOT cut bits out. thank you
Hot snotting the micro USB socket, a great start for David2... getting it all out of the way.
Çok güzel veriyy guut
I assume all the "thumbs down" are from people upset that every video does not star Dave1?
So we should thumb this up to fuck with them :>
Maybe people would press thumbs up if he said "winner winner chicken dinner" a couple of times, and Bob's your uncle.
Or perhaps the video wasn't that interesting. It's a good start, though.
I think I speak for everyone here when I say nobody cares how to clean a microscope.
basshead Yet you clicked on a video with that title and then proceeded to comment on it, why?
Good first video David 2, i like the Dave 1 and David 2 mash up.
WHO is this guy?
WHY do we care about cleaning a microscope?
Dave needs to clear out the HOARD.
david aka dave2, has been working with dave for over a year on and off while also doing university which he recently finished. dave bought an old microscope, it needed cleaning, some people do care. mailbag = hoard :P
Hey, David is back!
Crusty and sticky stuff? Where'd you get this thing from - a sperm donor clinic?
Unknown.
Little bit of missing information (added later through annotations) but overall really good. Nice work dave2
I thought Dave 2 was a yank ?
He's seems to be affected / infected by the Aussie environment and picking up the accent ?
;)
John
I took him to be from the UK when he first appeared - I commented on it at the time - but the Australian inflection is very infectious.
I am an Aussie from birth. Dave and I grew up in different areas and times in Sydney.
You'll have to adjust the camera!
Dave II is a bit taller than the average Auzzy Oompa-Loompa. :P
Nice vid, future is looking good for one of the best channels on TH-cam.
the lighting is terrible in this video
nice addition....
You mixed up the Y and Z axis.
Y is up and down and Z is depth.
I understand the confusion, but in this case it is correct, Z is the 3rd dimension. On the ground, map or piece of paper (or the table from the microscope), the dimensions are X and Y, the Z is the height above it.
Man dave, definitely a cool video, but you really need to neaten up you' game :)), keep up the good work !