Gentlemen of this distingushed group, How do you read labels on small ICs such as the ThinSOT or DFN packs that are 2mm x 3mm? Ok, I have old eyes, soldering these pups is do able but finding pin#1 is impossible for me even using 7X eye loupe. I know JL will say it is no problem with his $3K Mantis and others are so rich that they hire a tech but I am not in that group. There's got to be an easier way, say
I use a 10x Hastings triplett for most work, and have a 20x for really tiny stuff.
A USB microscope (e.g.,
Sometimes the labels on those small parts have very poor contrast and are quite difficult to read even with sufficient magnification!
---joel
On a sunny day (Fri, 18 Dec 2009 11:41:36 -0800 (PST)) it happened Harry D wrote in :
Digital camera, video out, super macro, on 20 inch monitor?
I use an Optivisor.
Get the hight power 2x or 3x lens.
Cheers
That's what I have. Bought my pair around 1980. I sometimes use them PLUS my reading glasses ;-) ...Jim Thompson
--
| James E.Thompson, CTO | mens |
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| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
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Hi, Harry:-
Us (we?) myopic folks just take off our glasses and get really, really close. ;-)
I wonder if it's mostly the lighting that is causing problems- the laser marking they are using these days is pretty hard to see even under ideal conditions. Maybe a surplus fiber optic illuminator and light it from the side? More light is good for old eyes.
Eg. (they are probably not the best supplier, but it's a photo of what I'm talking aboot):
Hi, Harry,
I thought everyone who works in today's electronics had garnered for himself at least one zoom stereo microscope. They usually go for about $200 at flea markets here in Silicon Valley (San Jose, CA). On Ebay they might be a little bit more. The new Celestron 44202 at $280 is in our price range, but lacking the zoom feature is a terrible handicap. IMHO 20X and 40X power levels are much too high for most electronics work - - I find myself using
7X most of the time. Over the years, I've encountered enough industrial salvage to populate every work bench I own with at least one Bausch & Lomb Stereozoom 4, and more recently I had the good fortune to spot an Olympus ZS4045 with a pair of Olympus GSWH10X/22 eyepieces and a ringlight for $160. The view through that thing is breathtaking! Looking through these instruments, if something is written, you'll be able to read it. They open up whole new worlds of possibility in electronic and almost any other area you can imagine. I find one almost indispensable for removing a sliver! I'm sure I'm not telling you anything you don't already know when I say, "If you can see it, you can do it".I just looked at Ebay - - don't buy one with 15X eyepieces - - 10X eyepieces are what you want. It should be complete with a stand - - there's a very nice 0.7X - 3X with 10X eyepieces on Ebay with a glass platform on a high-base stand that provides bottom illumination, but you probably won't use the bottom light much - - the stand will accommodate a Kohler illuminator for top lighting or a ringlight and they don't cost a whole lot. Don't buy a Stereozoom 6 - - in my experience field illumination is poor so they are not worth the extra cost.
Good luck to you,
Chuck
I'm surprised that Digikey and Mouser don?t carry these. I only see it listed in Mcmaster.
Cheers
Get the kids away from your monitor, then go to...
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
Help save the environment!
Please dispose of socialism properly!
Yes, I can usually read better with direct sunlight. I can even read the fine prints on them, but usually just for orientations.
4.0 diopter contacts, 2.5 diopter glasses, Optiviser, with a magnifying loop attached. If I can get close enough! Always wanted a pair of binocular glassses like my dentist uses but didn't want to part with the dollars. Hey, just did a search and found this, but I doubt it adjusts far enough for an 18" view.
Mike
Umm, Sigourney Weaver looked better in them ;D
Cheers
Better Jim than this guy:
Hey! Isn't that John Fields ?:-) ...Jim Thompson
-- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at
That's what I use. Works great, can also take nice shots of a circuit board for emailing. The object distance can be adjusted far enough that soldering under screen guidance is possible. That is how I solder really fine pitch SMT but it's tricky because you lose the 3D perception.
Dang, I paid 100 bucks ... but that was a long time ago and it has already paid for itself.
Lighting direction is the trick. On the Veho I usually keep the built-in LEDs off and point my halogen task light at the chip from the side.
-- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
What's in that binder titled "Perfect Time!" ?
-- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
Some of us have really maxed out our desk space with other stuff already :-)
-- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
A calendar that had nice pop-ups, but ceased to work at Win2K. I recently finally tossed the manual and used the binder for something else.
I now use Smart Desktop Calendar Pro.
The USB Specification binder is the _original_ stuff for which I have the patents (assigned to Intel, of course ;-) ...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
Help save the environment!
Please dispose of socialism properly!
Doesn't work for me. I can see much better at about a foot with my glasses than sticking the object in my eye. ;-) Evidently I've developed a nasty astigmatism (didn't know the lens shape changed) and even drug store "cheaters" are useless.
I am still using dead trees. Never warmed up to the PDAs and all that. Actually, I am right now punching holes into next year's refill from OfficeMax because the Danish system I use has the six rings in other locations than any US daytimer :-(
Can't rival that. But some of my stuff will now go into space :-)
-- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
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