I'm trying to make a serial version of Jaluino CELL, featuring other microcontrollers as 18F25k22 but long pads are killing me...
On Nov 4, 3:37 am, mattschinkel <[email protected]> wrote: > The 3 empty boards look like a structural thing. PCB is cheap and > tough > > Matt. > > On Nov 3, 4:48 pm, Joep Suijs <[email protected]> wrote: > > > What is the point of having 3 almost empty board and a cell? > > > Joep > > > 2010/11/3 funlw65(Vasi) <[email protected]>: > > > > Here: > > >http://jpmandon.blogspot.com/2010/11/partybot.html > > > is an example of how to use Jaluino CELL in a real application. > > > Warning, this is not for our PCB guru :) . > > > > Vasi > > > > On Nov 3, 12:05 pm, Sebastien Lelong <[email protected]> > > > wrote: > > >> I think you need to cut caps' wires ends after soldering :) > > > >> Cheers, > > >> Seb > > > >> 2010/11/3 funlw65(Vasi) <[email protected]> > > > >> > This is how it looks underside: > > >> >http://picasaweb.google.com/funlw65/20100513#5535259872597475378 > > > >> > On Nov 2, 5:56 pm, mattschinkel <[email protected]> wrote: > > >> > > The actual parts are cheaper in SMD as well. > > > >> > > Matt. > > > >> > > On Nov 2, 5:27 am, Oliver Seitz <[email protected]> wrote: > > > >> > > > > SMD versions would be cheaper to manufacturer. > > > >> > > > That's true. I've once asked my PCB assembling company, and they > > >> > > > told > > >> > me how PCBs are populated: > > > >> > > > 1. solder paste is applied to the top side for SMDs using a stencil > > >> > > > 2. top-side SMDs are placed in the paste > > >> > > > 3. top-side SMDs are soldered (infrared, hot-air or the like) > > >> > > > 4. bottom-side SMDs are glued in place without solder paste > > >> > > > 5. the glue is dried. This takes its time and therefore costs money > > >> > > > 6. top-side THTs are placed > > >> > > > 7. top-side THTs and bottom-side SMDs are soldered (possibly > > >> > > > selective, > > >> > wave soldering or the like) > > >> > > > 8. bottom-side THTs are placed and soldered by hand. That's > > >> > > > expensive, > > >> > of course. > > > >> > > > So, cheapest is SMD with parts on one side only. Next is THT only. > > >> > > > Then > > >> > come mixed SMD and THT with all parts on one side. Then SMD on both > > >> > sides > > >> > plus THT on top side only. The most expensive are PCBs with SMD and > > >> > THT, > > >> > both on both sides. > > > >> > > > I'm not sure where to put "SMDs on both sides, no THTs" as it could > > >> > well be that no glue is necessary then. > > > >> > > > All of this only applies to automatically populated PCBs in > > >> > > > perhaps 100 > > >> > pieces or more. For low quantities, THT might even be cheaper as no > > >> > solder-paste stencil has to be made. > > > >> > > > Greets, > > >> > > > Kiste > > > >> > -- > > >> > 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 > > > > -- > > > 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 > > > athttp://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]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
