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Care and Feeding of SMD Parts
Jack Purdum
A couple of weeks ago I mentioned that I was using more SMD parts and was looking for an assortment. Some assortments are sold in "folders", but being cheap, I went with vendors who sold components "loose" in strips. I ended up storing the parts in cosmetic sample jars (see eBay #161987389187). Make sure that the jars don't have recessed bottoms, as those won't work the way I mount them. Each jar has a 1/4"x3/4" piece of Velcro on its bottom and a label on the lid. Anything bigger than that "sticks" too well. Velcro is sold at Lowes in 15' strips, which is more than you need. Long strips of Velcro were stuck to a board and mounted on the wall:
I found it difficult to peel back the covering on the strips, so I used the edge of a box cutter to split the strip in half. It doesn't matter if the "half" includes some of the backing paper, too. I then took a sheet of 11"x8 1/2", creased it in the middle, and took the now-separated strip and slowly spread it apart. The pieces pop out onto the sheet easily and the crease makes it easy to load them into a jar. Label it and stick it on the wall and you're done. When I need parts, I just pull off the values I need and place it on my work table. (I've ordered more jars and I have more components that I can mount this way.) Obviously, you could store the parts in a plastic multi-compartment storage box like Harbor Freight sells. However, if you're the least bit klutsy and ever bumped the box off the table, you'll quickly discover that those compartments don't always fit tightly against the lid when it's closed and parts can bounce into other compartments. If you're really having a bad day, the box pops open after the fall and the resulting SMD shower is impossible to clean up, especially when your shack has camouflage carpeting. Anyway, because I only open one jar at a time as I need it, disaster can only befall one value at a time. For casual building, it works for me. Jack, W8TEE |
KC9SGV
开云体育Good solution ! Neat as well. I have sneezed and my SMD components became vacuum cleaner fodder... Then I put my SMD project away for a while and lug out my unfinished 813 valve RF amplifier project ! Try sneezing THAT away ! ? Bernie, KC9SGV Chicago On Jan 31, 2018, at 8:05 AM, Jack Purdum via Groups.Io <jjpurdum@...> wrote:
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Ken KM4NFQ
I buy SMD components in strips of 100, from Mouser. I cut them in strips of 25 and put them in a labeled envelope. I put the envelopes in a box, in order. Regards,To use a component, I press it from the plastic side, through the paper side with tweezers, then put the freed component on the solder-pasted pads. I work over an aluminum tray covered with a cloth. I haven't lost a component yet. Of course, I have only recently started working with SMDs, so take that with a grain of salt. :) |
开云体育I’ve been working with SMDs for a few years now and have lost several. ?If the get pressed right they fly off just like a tiddily wink. ?They also tend to adhere to tweezers, probes and soldering irons with very little effort. ?If it’s a cap or resistor I just fetch another one it’s not worth the effort of a futile search. One thing I do to try to minimize losses is to limit the number of loose parts I have out to two. ?If I need to install more than that I’ll do two at a time and tack solder them into place. Clark Martin KK6ISP
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I find it's easier to get the strip started if I put down a strip of double-sided sticky tape on a piece of cardboard, put the carrier for the SMD on the strip and use a small piece of tape on the edge of the strip to lift up the plastic covering. Keeps the strips for my project from wandering off and it holds the carrier and parts down for easy access with my tweezers. lifting up just enough of the covering to expose one part at a time prevents them from blowing away. ? Sent from Yahoo Mail. On Wednesday, January 31, 2018 1:38 PM, Clark Martin <kk6isp@...> wrote: I’ve been working with SMDs for a few years now and have lost several. ?If the get pressed right they fly off just like a tiddily wink. ?They also tend to adhere to tweezers, probes and soldering irons with very little effort. ?If it’s a cap or resistor I just fetch another one it’s not worth the effort of a futile search. One thing I do to try to minimize losses is to limit the number of loose parts I have out to two. ?If I need to install more than that I’ll do two at a time and tack solder them into place. Clark Martin KK6ISP
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I've been working with these parts for several years. I take a piece of printer paper and slit the corners so I can fold it into a tray. The parts are easy to see against the white paper and the sides of the tray keep them from flying off into limbo. The tray is easy to move to wherever I am working making access easier.?
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I have been using a 3-ring binder with clear plastic pages meant to hold trading cards -- 9 to a page.? The little strips go into the pockets quite nicely.? This also works pretty well for thru-hole resistors and caps.? With loose parts in the pockets it does take a little care leafing thru the pages not to spill the parts.
I label the pockets using a small permanent marker on the window, and a very fine marker on the back of the strips. Chip resistors tend to be marked with part values, which can be read under a low-power microscope.? Capacitors tend not to have any markings.? I guess that there are so many things you need to know about a capacitor, like what ceramic, and the voltage rating, that you would need an electron microscope to read it.? The only markings are on the reels the tapes come on. Industrially, these things are handled only as full reels, which are put into the pick-and-place machine AKA "chip shooter".? Individual markings on the parts themselves would be redundant. |
Tim said:? ? I take a piece of printer paper and slit the corners so I can fold it into a tray.
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I say:? ?? That way you don't have to dig around the workspace for 30 minutes to find the scotch tape. When hand stuffing surface mount parts, working within a large baker's cake tin can somewhat restrain all them flying 0402's and Sot23's. On Thu, Feb 1, 2018 at 07:21 am, Tim Gorman wrote: I take a piece of printer paper and slit the corners so I can fold it into a tray. |
Jack Purdum
Good Lord! I can't even SEE 0402's! Jack, W8TEE From: Jerry Gaffke via Groups.Io <jgaffke@...> To: [email protected] Sent: Thursday, February 1, 2018 11:05 AM Subject: Re: [BITX20] Care and Feeding of SMD Parts Tim said:? ? I take a piece of printer paper and slit the corners so I can fold it into a tray. I say:? ?? That way you don't have to dig around the workspace for 30 minutes to find the scotch tape. When hand stuffing surface mount parts, working within a large baker's cake tin can somewhat restrain all them flying 0402's and Sot23's. On Thu, Feb 1, 2018 at 07:21 am, Tim Gorman wrote: I take a piece of printer paper and slit the corners so I can fold it into a tray. |
开云体育I am throwing away a bag of 0402s I have collected over the years.? I hate them! I have 10s of thousands of SMDs.? I have shoe boxes full.? Some of the "Pill" boxes at the 99Cent stores work OK. I take a 100 at a time
out of the strips so I can grab them with tweezers out of pill
boxes.? I label the top with a small avery label. You can even get them for 5 or so pills a day and 7 days.? So 28 compartments in one small box.? Some pill boxes are so cheap, it is hard to open the flap lids.? So I have learned to buy just one for trial. The deluxe way to go
is the interlocking 1" boxes from the internet.? They lock
together in any size pattern.? The lids are clear and have a
spring.? You push the latch with your tweezers and the lip
flips up.?? Some vendors even send the whole selection of
resistors out in them.?? In about 1 ft Sq, you can get the
whole range of 5% values. 73's Mike, WA6ISP On 2/1/2018 8:31 AM, Jack Purdum via
Groups.Io wrote:
-- Mike Hagen, WA6ISP 10917 Bryant Street Yucaipa, Ca. 92399 (909) 918-0058 PayPal ID "MotDog@..." Mike@... |
Ken KM4NFQ
On Thu, Feb 1, 2018 at 11:31 AM, Jack Purdum via Groups.Io
<jjpurdum@...> wrote: Good Lord! I can't even SEE 0402's!You're probably referring to Metric 0402s? There can be some confusion between Imperial and Metric dimensions. An Imperial 0402 can be seen. A Metric 0402 is the size of a mustard seed, or smaller. An Imperial 0402 is the equivalent of a Metric 1005. Regards, Ken, KM4NFQ "Not Fully Qualified" |
Jack Purdum
Does matter...almost can't see either one! I'm pretty sure that Metric 0402 is a synonym for Higgs-Boson particle. Jack, W8TEE From: Ken KM4NFQ <km4nfq@...> To: [email protected] Sent: Thursday, February 1, 2018 12:51 PM Subject: Re: [BITX20] Care and Feeding of SMD Parts On Thu, Feb 1, 2018 at 11:31 AM, Jack Purdum via Groups.Io <jjpurdum=[email protected]> wrote: > Good Lord! I can't even SEE 0402's! > You're probably referring to Metric 0402s? There can be some confusion between Imperial and Metric dimensions. An Imperial 0402 can be seen. A Metric 0402 is the size of a mustard seed, or smaller. An Imperial 0402 is the equivalent of a Metric 1005. Regards, Ken, KM4NFQ "Not Fully Qualified" |
Vince Vielhaber
I've seen bigger specks of pepper than an 0402
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Vince. On 02/01/2018 01:41 PM, Doug W wrote:
Kind of like asking if I want to get hit in the head with an 8 pound or --
Michigan VHF Corp. |
Our 1206's are Imperial, by the way.
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That's 0.12 inches long, 0.06 inches wide. The chart entirely missed the 0201's (Imperial). Quite cheap if you buy 'em by the reel, check out Mouser?603-AC0201JR-075K1L For some reason they don't seem to print the resistor value on them. We sometimes used 0201's for board mods. Good for adding an overlooked 100 ohm terminator, for example. Fit nicely between adjacent 20mil pitch TQFP pins.? On Thu, Feb 1, 2018 at 10:46 am, Vince Vielhaber wrote: I've seen bigger specks of pepper than an 0402 |
开云体育Hello,The 2512 parts look doable if they sell them still that size. Thanks for the pic. James Lawrie On Feb 1, 2018, at 12:41, Doug W <dougwilner@...> wrote:
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Mike, if you get a chance, would you provide a link example of the spring load 1" boxes. Thanks Roy WA0YMH On Feb 1, 2018 11:18 AM, "Michael Hagen" <motdog@...> wrote:
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M Garza
Not sure if this is the same thing or not: Marco - KG5PRT On Thu, Feb 1, 2018 at 3:12 PM, Roy Appleton <twelveoclockhigh@...> wrote:
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M Garza
Or this one: Marco - KG5PRT On Thu, Feb 1, 2018 at 4:36 PM, M Garza <mgarza896@...> wrote:
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开云体育Yes, looks like the
same.? I got mine from Seeed.? There are White, Pink, Green,
Blue. They have long ones too. I have a lot of them, also pill boxes.?? These are more expensive but much better. I have most all values of 0602 Resistors all hooked together.? I used a label program to print on small Avery type labels with the values. My 99Cent store usually has several size labels in small packets. Mike
On 2/1/2018 2:40 PM, M Garza wrote:
-- Mike Hagen, WA6ISP 10917 Bryant Street Yucaipa, Ca. 92399 (909) 918-0058 PayPal ID "MotDog@..." Mike@... |