Surface mount components
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Well, now that I've successfully created a circuit board using the
expose/develop/etch method, I want to try my hand using surface mount parts.
I successfully soldered a SM chip in a SOIC package (I think it was SOIC) to
a premade board I had (surf board) and would like to begin usin SM parts on
the circuit boards I make.
Problem I currently have is not knowing what the physical dimensions are of
the various surface mount packages of passive components such as resistors.
I was out shopping this morning and saw devices listed as being in a 603 and
1206 package (and one that started with an 8, but don't remember the rest),
but am not sure what I really want to order since I don't know how big each
package is.
The other thing I ran into is that Allied only sells SM resistors in reels
of 5000! While $17 is not out of my budget, I just really don't need 5k
resistors hanging around. Where do you guys go for hobby quantify of
surface mount parts such as resistors and capacitors? I need to start my
collection of SM parts; everything I have now is all through hole.
Any information is appreciated.
-- Mitch
expose/develop/etch method, I want to try my hand using surface mount parts.
I successfully soldered a SM chip in a SOIC package (I think it was SOIC) to
a premade board I had (surf board) and would like to begin usin SM parts on
the circuit boards I make.
Problem I currently have is not knowing what the physical dimensions are of
the various surface mount packages of passive components such as resistors.
I was out shopping this morning and saw devices listed as being in a 603 and
1206 package (and one that started with an 8, but don't remember the rest),
but am not sure what I really want to order since I don't know how big each
package is.
The other thing I ran into is that Allied only sells SM resistors in reels
of 5000! While $17 is not out of my budget, I just really don't need 5k
resistors hanging around. Where do you guys go for hobby quantify of
surface mount parts such as resistors and capacitors? I need to start my
collection of SM parts; everything I have now is all through hole.
Any information is appreciated.
-- Mitch
Comments
>Well, now that I've successfully created a circuit board using the
>expose/develop/etch method, I want to try my hand using surface mount parts.
>I successfully soldered a SM chip in a SOIC package (I think it was SOIC) to
>a premade board I had (surf board) and would like to begin usin SM parts on
>the circuit boards I make.
>
>Problem I currently have is not knowing what the physical dimensions are of
>the various surface mount packages of passive components such as resistors.
>I was out shopping this morning and saw devices listed as being in a 603 and
>1206 package (and one that started with an 8, but don't remember the rest),
>but am not sure what I really want to order since I don't know how big each
>package is.
>
The other one is probably an 0805. If you are using a CAD package to do
your layout, it may include a library of standard surface mount footprints.
Otherwise you may be able to create your own footprints off the information
provided on the datasheets for the resistors and capacitors you will be
using. Most component manufacturers have web sites where you can get the
datasheets.
>The other thing I ran into is that Allied only sells SM resistors in reels
>of 5000! While $17 is not out of my budget, I just really don't need 5k
>resistors hanging around. Where do you guys go for hobby quantify of
>surface mount parts such as resistors and capacitors? I need to start my
>collection of SM parts; everything I have now is all through hole.
>
I use Digikey. Virtually everything they have is available in small
quantities.
>Any information is appreciated.
>
>-- Mitch
>
>
>
>
>
>
>
> resistors in reels
> of 5000! While $17 is not out of my budget, I just really
> don't need 5k
> resistors hanging around. Where do you guys go for hobby quantify of
> surface mount parts such as resistors and capacitors? I need
> to start my
> collection of SM parts; everything I have now is all through hole.
Digikey (www.digikey.com) carries a good range of SMT components and you can
order them in the 10s, not 1000s. Their catalog has the dimensions and
footprint sizes for most items. Make sure you order everything you need at
once, otherwise the freight will dominate the cost of the components.
The standard sizes for resistors are:
0402 - Not for the faint of heart
0603
0805
1206 - Easy to solder by hand
Capacitors come in many bigger sizes.
Chris.
than one person is after the same answer, maybe more will be
motivated to respond...well?????
Original Message
From: Mitchell D. Miller [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=nWehNF9xixvK3BiKXq8fgcHjHJ0q1UUv1Wug666WiMTJpVsAjoyEgug6OPxUtCkoKTX5mOO5k9kWQFT-VA]mdmiller2@h...[/url
Sent: Thursday, July 13, 2000 1:10 PM
To: sxtech@egroups.com; piclist@t...;
PICLIST@M...;
basicstamps@egroups.com
Subject: [noparse][[/noparse]basicstamps] Surface mount components
Well, now that I've successfully created a circuit board using the
expose/develop/etch method, I want to try my hand using
surface mount parts.
I successfully soldered a SM chip in a SOIC package (I think
it was SOIC) to
a premade board I had (surf board) and would like to begin
usin SM parts on
the circuit boards I make.
Problem I currently have is not knowing what the physical
dimensions are of
the various surface mount packages of passive components such
as resistors.
I was out shopping this morning and saw devices listed as
being in a 603 and
1206 package (and one that started with an 8, but don't
remember the rest),
but am not sure what I really want to order since I don't know
how big each
package is.
The other thing I ran into is that Allied only sells SM
resistors in reels
of 5000! While $17 is not out of my budget, I just really
don't need 5k
resistors hanging around. Where do you guys go for hobby quantify
of
surface mount parts such as resistors and capacitors? I need
to start my
collection of SM parts; everything I have now is all through hole.
Any information is appreciated.
-- Mitch
since you don't need holes, you can be a bit more sloppy with the component
placements and get away with it (for prototypes anyway). basically what I did
when I started out was to just run two tracks toward each other, and leave a gap
between them, then you can put any size resistor you want as long as the gap is
under the component.
since you're not putting on a solder mask layer (likely) you can get away with
it.
Jason Lavoie
"Mitchell D. Miller" wrote:
> Well, now that I've successfully created a circuit board using the
> expose/develop/etch method, I want to try my hand using surface mount parts.
> I successfully soldered a SM chip in a SOIC package (I think it was SOIC) to
> a premade board I had (surf board) and would like to begin usin SM parts on
> the circuit boards I make.
>
> Problem I currently have is not knowing what the physical dimensions are of
> the various surface mount packages of passive components such as resistors.
> I was out shopping this morning and saw devices listed as being in a 603 and
> 1206 package (and one that started with an 8, but don't remember the rest),
> but am not sure what I really want to order since I don't know how big each
> package is.
>
> The other thing I ran into is that Allied only sells SM resistors in reels
> of 5000! While $17 is not out of my budget, I just really don't need 5k
> resistors hanging around. Where do you guys go for hobby quantify of
> surface mount parts such as resistors and capacitors? I need to start my
> collection of SM parts; everything I have now is all through hole.
>
> Any information is appreciated.
>
> -- Mitch
> Digikey (www.digikey.com) carries a good range of SMT components
and you can
> order them in the 10s, not 1000s. Their catalog has the dimensions
and
<snip>
I'd like to second the recommendation for Digi-Key. Not only do they
sell these smaller quantities, but most are available packed in cut
tape (ammo belt) format. This packaging makes it much easier to
handle and store small quantities of SMT parts. Avoid 'bulk'
packaging, which is just a bunch of parts in a plastic bag. Some of
the smaller SMT packages are smaller than grains of rices
(approaching coarse-ground pepper!) and can be difficult to dispense,
handle and repack in plastic bags.
With cut tape, you peel away the backing to dispense exactly the
number of parts you need, leaving the remainder neatly packed away.