Reading labels on small ICs
in [Design]
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From: amdx on 18 Dec 2009 17:17 "Jim Thompson" <To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com/Snicker> wrote in message news:g1pni5lbobvam1mberhsjqq5cqmi5mrun9(a)4ax.com... > On Fri, 18 Dec 2009 15:15:52 -0500, "Martin Riddle" > <martin_rid(a)verizon.net> wrote: > >> >> >>"Harry D" <harryd(a)tdsystems.org> wrote in message >>news:42987c77-ce23-4e80-adb8-0641bda7bebd(a)y10g2000prg.googlegroups.com... >>> 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 <$300. >>> Former member needs help; >>> Harry D. >> >>I use an Optivisor. >><http://www.doneganoptical.com/optivisor.php> >>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 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. http://www.binoculite.com/about_binoculite.html Price is right, might get one just for fun. Mike
From: Martin Riddle on 18 Dec 2009 17:43 "Jim Thompson" <To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com/Snicker> wrote in message news:thvni519kagj3ncuve104eoroo1es71odf(a)4ax.com... > On Fri, 18 Dec 2009 16:22:23 -0500, "Martin Riddle" > <martin_rid(a)verizon.net> wrote: > >> >> >>"Jim Thompson" >><To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com/Snicker> >>wrote in message news:g1pni5lbobvam1mberhsjqq5cqmi5mrun9(a)4ax.com... >>> On Fri, 18 Dec 2009 15:15:52 -0500, "Martin Riddle" >>> <martin_rid(a)verizon.net> wrote: >>> >>>> >>>> >>>>"Harry D" <harryd(a)tdsystems.org> wrote in message >>>>news:42987c77-ce23-4e80-adb8-0641bda7bebd(a)y10g2000prg.googlegroups.com... >>>>> 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 <$300. >>>>> Former member needs help; >>>>> Harry D. >>>> >>>>I use an Optivisor. >>>><http://www.doneganoptical.com/optivisor.php> >>>>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 >>> -- >> >>I'm surprised that Digikey and Mouser don�t carry these. I only see it >>listed in Mcmaster. >><http://www.mcmaster.com/#headband-magnifiers/=4zmoob> >> >>Cheers >> >> > > Get the kids away from your monitor, then go to... > > http://www.analog-innovations.com/SED/OptiVisorMonster.jpg > > ...Jim Thompson > -- Umm, Sigourney Weaver looked better in them ;D Cheers
From: Joel Koltner on 18 Dec 2009 18:13 "Martin Riddle" <martin_rid(a)verizon.net> wrote in message news:hgh0jd$503$1(a)news.eternal-september.org... > "Jim Thompson" <To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com/Snicker> >> Get the kids away from your monitor, then go to... >> http://www.analog-innovations.com/SED/OptiVisorMonster.jpg > Umm, Sigourney Weaver looked better in them ;D Better Jim than this guy: http://awkwardfamilyphotos.com/2009/06/26/the-joker/
From: Jim Thompson on 18 Dec 2009 18:16 On Fri, 18 Dec 2009 15:13:48 -0800, "Joel Koltner" <zapwireDASHgroups(a)yahoo.com> wrote: >"Martin Riddle" <martin_rid(a)verizon.net> wrote in message >news:hgh0jd$503$1(a)news.eternal-september.org... >> "Jim Thompson" <To-Email-Use-The-Envelope-Icon(a)My-Web-Site.com/Snicker> >>> Get the kids away from your monitor, then go to... >>> http://www.analog-innovations.com/SED/OptiVisorMonster.jpg >> Umm, Sigourney Weaver looked better in them ;D > >Better Jim than this guy: http://awkwardfamilyphotos.com/2009/06/26/the-joker/ 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 http://www.analog-innovations.com | 1962 | Help save the environment! Please dispose of socialism properly!
From: Joerg on 18 Dec 2009 19:36
Joel Koltner wrote: > "Harry D" <harryd(a)tdsystems.org> wrote in message > news:42987c77-ce23-4e80-adb8-0641bda7bebd(a)y10g2000prg.googlegroups.com... >> How do you read labels on small ICs such as the ThinSOT or DFN packs >> that are 2mm x 3mm? > > I use a 10x Hastings triplett for most work, and have a 20x for really > tiny stuff. > > A USB microscope (e.g., > http://www.amazon.com/Veho-VMS-001-Megapixel-Digital-Microscope/dp/B001ACKIUO) > can also be handy. > 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. > Sometimes the labels on those small parts have very poor contrast and > are quite difficult to read even with sufficient magnification! > 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. |