[sdiy] Need help with a SMD kit (OT?)
charlie wallace
charlie at finitemonkeys.com
Wed Jul 19 19:56:47 CEST 2017
has anyone found out if those little boxes are really esd safe, never
got a good answer, they often advertise as for SMD, but that means
nothing
there is also these
https://www.aliexpress.com/store/product/ESD-Safe-SMD-IC-Box-W-144-Bins-Anti-statics-SMD-SMT-Organizer-Transistor-Diode/425967_909915769.html
On Wed, Jul 19, 2017 at 10:45 AM, <sleepy_dog at gmx.de> wrote:
>
> Ok, so you flip at least once per component height class of your boards ;)
> And fiddle with wires / bend them etc to make them go in.
> And then cut them after soldering.
>
>>> For SMD, one has to get the resistor off of a tape. 9 times out of 10, I
>>> drop the resistor during this process <<
>
> This, you needn't do.
> Get some of those:
> https://www.picclickimg.com/d/l400/pict/371330932745_/1x-100-Leer-Container-Box-blau-f%C3%BCr-SMD.jpg
>
> Call one pile of them e.g. "the 0805 resistor box", click the small things
> together in an arrangement which makes sense for the kinds of values you
> have.
> Then buy 200 (or whatever you like) of each value and pour them in the
> correct boxes.
> Those "hatches" are available as self-closing by spring.
>
> Do the same for other components commonly used.
>
> Then you are set up for building:
> With good (perhaps angled) pointy tweezers, you grab into the box that has
> the label of the component to solder, and grab one of the parts, put it on
> the PCB, there you go.
>
> Not anywhere near as fumbly as buying it on reel and then cutting them out
> individually ;-)
>
> Steve
>
>
> Am 19.07.2017 um 17:50 schrieb David G Dixon:
>
> What's all this "flipping the board over" and "parts falling out" business?
> I stuff all resistors and diodes, hold a small piece of wood over them, flip
> once and set down on the piece of wood, solder all joints, then snip clean.
> Then I do all sockets, again, stuff, flip once, solder all joints. Then I
> finish with all the random parts that have random heights. Soldering TH
> joints takes about 2 seconds per joint once you get a rhythm going. Plus, I
> can stuff parts in front of the TV in my easy chair, then carry the stuffed
> board out to the garage for soldering if I want to. That's my usual plan
> when it's too warm or cold in the garage.
>
> Parts do require some preparation, but I lay out all of my boards so that
> the resistor leads are 0.4" apart, and for the standard 1/4W resistor, all
> this requires is to bend the leads at a 90-degree angle to the resistor body
> with my fingers. Then I snip the leads to about 1 cm. Sometimes I bend all
> then snip all, and sometimes I bend and snip each one at a time. This I
> consider a part of the procedure of retrieving the resistors from their
> respective packages.
>
> For SMD, one has to get the resistor off of a tape. 9 times out of 10, I
> drop the resistor during this process. With TH, I can prepare all of my
> parts, lay them out on the bench if I want to and compare them with my BOM.
> Then I can stuff them in a completely organized fashion. I always find the
> stuffing of my own boards to be a completely pleasurable process, very
> relaxing. I could literally do it all day (and I plan to after I retire
> from my day job in 2020).
>
> ________________________________
> From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of mark
> verbos
> Sent: Wednesday, July 19, 2017 2:49 AM
> To: synth-diy at synth-diy.org
> Subject: Re: [sdiy] Need help with a SMD kit (OT?)
>
> I’m with Roman. Sure, I have hot tweezers, hot air, a pick and place
> machine….
>
> But I switched entirely to SMD about 10 years ago. Initially used 1206
> passives. I will NEVER go back. It takes way more time to assemble through
> hole, with all the flipping the board over and parts falling out/sticking up
> too high. The PCBs are way more cramped and annoying to layout in TH. I
> build all of my prototypes with mostly 0603 passives by hand using nothing
> more than a fine tipped iron. Also, I use lead free, organic water clean
> flux. I wash the PCB with hot distilled water and the results look like a
> professional machine built PCB. I don’t mess with breadboards, I just go
> from a drawing to a PCB. When something needs to be reworked, I use
> wire-wrap wire and hang parts off the board. Then make the changes to the
> PCB file for the future.
>
> Do a few projects with it, and you’ll never go back. I promise.
>
>
> Mark
>
>
> On Jul 19, 2017, at 1:58 AM, David G Dixon <dixon at mail.ubc.ca> wrote:
>
>
> SMD was developed for robots. I don't feel a need to hone a skill to
> compete with a robot, thanks.
>
>
> On 18 Jul 2017, at 22:23, David G Dixon <dixon at mail.ubc.ca> wrote:
>
> This post sums up why I simply will not do SMD by hand. Not... worth...
> the... frustration.
>
>
>
>
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