Could you send the link to that article? Thanks Eze --- In avrclub@avrc..., "poitsplace <lmburt@e...>" <lmburt@e...> wrote: > Heh...they don't. You just have to make a board with in-circuit > programming. There is some good news about that though. First off, > Atmel uses the wider .8mm pin spacing for their chips...as I > mentioned before. Second...the forces at those scales actually work > in your favor. Just put some solder on the pads first then put a > little bit of paste flux down on the pads and solder down your chip. > If by chance you solder two or more pins together, just clean it up > with a desoldering braid. > I actually saw one article in which they used paste solder (that > mixture of flux/ground up solder) and just ran a bead of the solder > around all the contacts, put the chips on top...and put the whole > board in a toaster oven (and of course, it worked) > > --- In avrclub@avrc..., acetoel <no_reply@y...> wrote: > > Hi, > > I know there are thru mount PLCC sockets, but the ATMega128 is > > TQFP not PLCC. Can I use my ATMega128 with a PLCC socket? That's my > > question. For all the ATMega64 and 128 users, in which kind of > > socket they put their mmicro? > > Thanks > > Ezequiel

Heh...they don't. You just have to make a board with in-circuit programming. There is some good news about that though. First off, Atmel uses the wider .8mm pin spacing for their chips...as I mentioned before. Second...the forces at those scales actually work in your favor. Just put some solder on the pads first then put a little bit of paste flux down on the pads and solder down your chip. If by chance you solder two or more pins together, just clean it up with a desoldering braid. I actually saw one article in which they used paste solder (that mixture of flux/ground up solder) and just ran a bead of the solder around all the contacts, put the chips on top...and put the whole board in a toaster oven (and of course, it worked) --- In avrclub@avrc..., acetoel <no_reply@y...> wrote: > Hi, > I know there are thru mount PLCC sockets, but the ATMega128 is > TQFP not PLCC. Can I use my ATMega128 with a PLCC socket? That's my > question. For all the ATMega64 and 128 users, in which kind of > socket they put their mmicro? > Thanks > Ezequiel

Hi, I know there are thru mount PLCC sockets, but the ATMega128 is TQFP not PLCC. Can I use my ATMega128 with a PLCC socket? That's my question. For all the ATMega64 and 128 users, in which kind of socket they put their mmicro? Thanks Ezequiel --- In avrclub@avrc..., "Patrick A. Timlin" <ptimlin@y...> wrote: > --- "poitsplace <lmburt@e...>" <lmburt@e...> wrote: > > PLCC is good if you want it socketedd > > (cause you sure as heck can't take off a PLCC chip easily)...read a > > couple messages back for a tip on soldering the PLCC sockets down. > > You can buy thru hole mount PLCC sockets which are a no brainer to solder. > This is a nice alternative is you want thru hole for your prototyping (use > the socket) then move to surface mount later (just solder the PLCC chip down > directly to the board). > ===== > Patrick Timlin ptimlin@y... > http://www.geocities.com/ptimlin/ > > __________________________________________________ >

--- "badpacket94501 <badpacket94501@badp...>" wrote: > Now of course, how to find a hobbyists 'kit' that doesn't cost $50, > and give me 3000 resistors..... > > Anyone know of a site that has a decent starter kit of resistors, > caps, etc? I am assuming buying them on an as needed basis would get > a litle expensive at Radio Shack? You might try All Electronics Corp at http://www.allelectronics.com/ They have cool stuff for cheap. A standard 500 piece 1/4W resistor assortment (thru hole parts) is values from 4.7 ohms to 10 Meg ohms with multiple (5, 10 or 20) pieces each of the more popular values) is $8.95US. I don't see a capacitor assortment pack, but they have lots of different ones you can pick and choose from. They do have an LED assortment pack (50 pieces, $4US). If you want, I can see what I have and maybe we can work out some sort of trade (you send me an AVR chip or two assuming you have or will be buying some, and I send you a care package of resistors, caps, sockets, LEDs, headers, PCB connectors, crystals, etc.). Contact me offlist if you want to see about working out some sort of trade. ===== Patrick Timlin ptimlin@ptim... http://www.geocities.com/ptimlin/ __________________________________________________

--- "poitsplace <lmburt@lmbu...>" <lmburt@lmbu...> wrote: > PLCC is good if you want it socketedd > (cause you sure as heck can't take off a PLCC chip easily)...read a > couple messages back for a tip on soldering the PLCC sockets down. You can buy thru hole mount PLCC sockets which are a no brainer to solder. This is a nice alternative is you want thru hole for your prototyping (use the socket) then move to surface mount later (just solder the PLCC chip down directly to the board). ===== Patrick Timlin ptimlin@ptim... http://www.geocities.com/ptimlin/ __________________________________________________

> Hey, thanks. I think I may start out with somethinglike the > 2010's, I really would suggest you go with 1206's instead of 1210's. With 1206 sized resistors, you can space them at standard DIP spacing and still run traces between. You'd be amazed how often something as simple as running traces between pins can eliminate a world of soldering (and a loads of board space) > Now of course, how to find a hobbyists 'kit' that doesn't cost $50, and give me 3000 resistors..... > Anyone know of a site that has a decent starter kit of resistors, > caps, etc? I am assuming buying them on an as needed basis would > get a litle expensive at Radio Shack? You pretty much have to get them in bulk. I know http://www.halted.com used to sell them, but they don't seem to have a catalog any more so I can't quote you prices. You can also SMT normal resistors. Just bend one side down and clip it off and bend the other side down, then bend it back to horizontal after the bend. That gives you a nice little handle to hold while you solder down the first side. Then you can clip off the lead on the other side and tack it down. If you surface mount LARGE components, you might want to stick them down with a hot glue gun (or some sort of adhesive) before you solder them on.

Hey, thanks. I think I may start out with somethinglike the 2010's, a little bit bigger. But, good tip about going smaller is I need multiple side by side. Now of course, how to find a hobbyists 'kit' that doesn't cost $50, and give me 3000 resistors..... Anyone know of a site that has a decent starter kit of resistors, caps, etc? I am assuming buying them on an as needed basis would get a litle expensive at Radio Shack? Thanks again.

--- In avrclub@avrc..., "badpacket94501 <badpacket94501@y...>" <badpacket94501@y...> wrote: > --- In avrclub@avrc..., "poitsplace <lmburt@e...>" > <lmburt@e...> wrote: > > Hey, how about some suggestions for newbies on what are the best > package types to buy our uControllers? I know some of them are > simply to small to solder with standard gear, however, what are some > of the easiest surface mounts to solder ? SOIC is the easiest. Twice as many pins per inch as a standard DIP, and no hassles trying to get the solder to the pins. SOJ isn't bad, but I don't think you can get any Atmel chips in that package (but you can get SRAM in those). PLCC is good if you want it socketedd (cause you sure as heck can't take off a PLCC chip easily)...read a couple messages back for a tip on soldering the PLCC sockets down. Of course, from Atmel's PDF's it seems that all their Quad Flat Pack MCU's are the larger versions. They're only about 50% higher pin density than SOIC chips...so it's still within a normal person's abilities (although it's a real pain, I'm sure) If you're buying surface mount resistors I'd suggest you go with 805 or 1206 sized parts 805 is pretty small...about .1 inches long (as wide as the standard DIP pin spacing) 1206 is about .15 inches long and just a bit wider than 805 If for some reason you need to use bunches of resistors side by side to connect to say...8 output lines on a SOIC latch...you'd need something even smaller...a 603 sized resistor would work on that, but it would be a real pain to work with. BTW, don't think that just because I know the sizes that I have much experience with this stuff.