Very good solders! I have to try it again soldering some 12F675... if it will be a success, then SOIC will enter in my list. 18F14K50 and 18F2550 SOIC packages are very good replacements for FTDI chips (man, this opens the horizon for the bigger development boards...). Vasi
On Feb 3, 2:20 am, Sebastien Lelong <[email protected]> wrote: > OK, here we go... > > This is the result, soldered PIC18F25K22, 28-pins SOIC package on a breakout > board: > > [image: overview.jpg] > > Zoom in... I used a 10X jeweler magnifier. Appropriate focal is quite hard > to catch... > > [image: zoom1.jpg] > > Once soldered, I tested connections. Many of them didn't work: pins from > SOIC weren't properly soldered. I didn't put solder on pads before, only for > the first two pins (opposite) to align the chip. When I tried the other PIC, > I pre-soldered all pads, thus connections were better. I'm not sure this is > required though, usually videos I could see only pre-soldered two pads. I > had to use solder wick, try again, and again, and... You can also see > remaining solder flux I'd need to clean. > > More zoom in: 10X magnifier + macro photo + camera zoom = bad focal but > interesting anyway... > > [image: zoom2.jpg] > > You can see solder "behind" the pin. From what I could understand, this is > the goal. Unfortunately, not all pins are like that :) > > SOIC package allows to put your solder tip between pins, to propagate solder > all aound the pin. This is very convenient, compared to SSOP package (I > soldered FTDI chip, was clearly a mess, I destroy everything) > > Cheers, > Seb > > 2011/2/2 funlw65(Vasi) <[email protected]> > > > > > Yes, I want. Can't laugh, isn't worse than my soldering. > > >http://lh5.ggpht.com/_Z3E9awpWQh4/SddE_Su4KKI/AAAAAAAAHkM/aF5AkeLGxrs... > > >http://lh4.ggpht.com/_Z3E9awpWQh4/SfPug-yx9LI/AAAAAAAAHqg/3jVjebaJjZA... > > > Vasi > > > On Feb 2, 6:29 am, Sebastien Lelong <[email protected]> > > wrote: > > > Hi, > > > > I soldered a 18F23J57 and a 18F25K22, SOIC package, on breakout boards. > > > Wasn't that hard, though I would have liked being properly equipped to > > > desolder as needed :) > > > > I'll post photos if you like, and if you promise not to laugh :) > > > > Cheers, > > > Seb > > > > 2011/2/2 funlw65(Vasi) <[email protected]> > > > > > Hi guys, > > > > > Here on this topic > > > >http://www.thebackshed.com/forum/forum_posts.asp?TID=3206&PN=1 > > > > you can see a SMD clamp (at the middle of the page, I think), DIY > > > > style. Very useful. > > > > > Vasi > > > > > On Feb 2, 10:37 am, Sebastien Lelong <[email protected]> > > > > wrote: > > > > > Hi Vasile,, > > > > > > 2010/9/3 vasile surducan <[email protected]> > > > > > > > Flux dispensing pen is for ladies... > > > > > > buy one wood rosin brick from any store where musical instruments > > > > (violins) > > > > > > are sold. Smash it to sand dimensions and melt it in 99% alcohol > > > > (ethanol). > > > > > > Stir the bottle and rest it for one day then brush it on your > > fabulous > > > > PCB > > > > > > artwork. > > > > > > Can you give more information about the involved quantities in your > > > > recipe > > > > > ? > > > > > About rosin wood, which one would you choose amongst the following: > > > >http://www.simplyviolin.com/page16/page16.php?categories=Rosin > > > > > > I guess this is the rawest one: > > > >http://www.simplyviolin.com/page16/files/Cheap%20violin%20rosin.jpg > > > > > > How many alcohol with this ? > > > > > > TIA > > > > > Cheers, > > > > > Seb > > > > > -- > > > > You received this message because you are subscribed to the Google > > Groups > > > > "jallib" group. > > > > To post to this group, send email to [email protected]. > > > > To unsubscribe from this group, send email to > > > > [email protected]<jallib%[email protected]> > > <jallib%[email protected]<jallib%[email protected]> > > > > > . > > > > For more options, visit this group at > > > >http://groups.google.com/group/jallib?hl=en. > > > -- > > You received this message because you are subscribed to the Google Groups > > "jallib" group. > > To post to this group, send email to [email protected]. > > To unsubscribe from this group, send email to > > [email protected]<jallib%[email protected]> > > . > > For more options, visit this group at > >http://groups.google.com/group/jallib?hl=en. > > -- > Sébastien Lelonghttp://www.sirloon.nethttp://sirbot.org > > overview.jpg > 183KViewDownload > > zoom1.jpg > 202KViewDownload > > zoom2.jpg > 169KViewDownload -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
