Circuit Skills: Surface Mount Devices
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- Опубліковано 5 жов 2024
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Join Collin Cunningham as he explores the oh-so-tiny world of surface mount electronics. Follow along as he constructs what may be the world's smallest phototheremin all in super-macro detail - plus learn why adhesive poster putty is so darn useful.
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Finally, a Make Magazine video about actually MAKING something.
THANK YOU Collin.
Hi Collin
I really like your videos and this one is no exception. I need to get going on designing my boards for SMD and your video helped me see that it isn't impossible for human hands. Thanks for the all of the tips. Excellent stuff.
Cheers
Ray
My job involves operating a 'pick and place' SMD machine. Last week I was placing 0201 resistors (some just 0.5mm apart) and 2x3mm IC's. Thank god for optical centering!
Good luck finding that 0402 resistor when you drop it on the ground :P
You don't need that adhesive crab. Just presolder one or two pin and tack the ic with one or to legs to the presoldered pins. It's easy and there will be no molten adhesive....
First surface mount soldering I had to do was 0402.... that was terrifying!
I miss Collin. :(
okay, well a lot of people seem to be bitching about the music. I didn't even notice it the first watch, but after reading the comments and relistening to it, I new realize why I liked this video so much. The music reminds me of the old 321contact/reading rainbow style instruction/education videos.
so, whatever. I liked it Collin.
i work with smt parts everyday operating and reworking, if i might suggest its much easier to tin one of the lands then use it to tack the component down. Instead of messing about with tack. Also a little bit of extra flux goes a long long way.
i like his circuit skills series. very good way to introduce us to topics.
A cleaner way to solder SMD devices is to tin each pad, then put the SMD down and press each lead down with the soldering iron. This will minimize the amount of solder used (for a cleaner connection) and make it easier to solder, as you only have to apply the soldering iron to each lead, not the soldering iron + the solder.
For caps and resistors I just tin one of the pads, hold it down and reflow the solder. Same for the larger ICs, although I do one of the corners. A cheap usb microscope is fantastic for inspecting smd solder joints.
Daniel Astbury Just use solder paste, with less component heating.
Solder paste is intended for use on SMD components, but works equally well on through hole applications.
Has the proper mix of low temp solder and flux in a convenient and easy to apply syringe applicator.
Apply a tiny amount on the pad, place and press the component on the pad and add heat.
Makes beautiful/perfect solder joints every time.
Using a soldering iron is optional, use a heat gun or HD hair dryer as a heat source.
Also for the number of connections per gram makes it is less expensive than wire solder and flux.
I agree completely about the USB microscope.
patw52pb1
Yeah I recently got a soldering station with a hot air iron. I use solder paste but I find it a huge pain to dispense properly on the board.
Daniel Astbury Sorry to hear that it is a pain.
Please describe how it is a pain for you?
What are you using to dispense the paste?
wow that fun tack! it doesn't have any adverse effects on the board? what a great makeshift fix to keep parts in place!
My son and I did our first surface-mount soldering just yesterday to fix his LEGO NXT display. :)
From learning this video I can now use that protoboard to make a SMD version of the VLF converter circuit if I can find 4 pin oscillator chips in SMD size.
The music was kinda ironic. Like...the vid was about SMDs, but the music was like, "Hey! The transistor has just been invented! Let's make electronic music! Won't THAT be futuristic!"
it was meant as an introduction dude, i found it fairly useful. if i want more info i can look further, if i dont think i will i wont. you dont need to rage
The sound coming from this little device reminds me of the dentist.
I really like those videos, they are informative and generally fun to watch!
how about solder paste? they are pretty useful too
I was wondering the same thing why didn't he use solder paste
ur a pro at soldering man!!!!
those were so exact, and so small but you did it perfectly!!
What I tend to do is this; get a little solder onto one pad on the board, then reflow one end/pin, solder the other(s) properly, then remove the tack solder with wick(because it lacked flux at the time of reflow) then resolder it.
Tools I find useful for SMD work are bent-nose tweezers, a J-tip soldering iron and a good magnifying lamp. I also use 0.46mm solder. That's a big help in not making the joints blobby.
The best advice though; Avoid anything smaller than 0805 wherever possible. I've done 0402 by hand and it's not much fun. I have also seen 0102 being done by hand, but that was under a $100K microscope.
Tips:
- do like others have said and "tack solder" the component first. Reheat the solder joint and adjust if needed.
- use a little flux at each joint. Clean up with alcohol.
- apply heat the to BOTH surfaces - the trace and the component.
- use WAY less solder.
I would have tacked soldered one leg of the 555, applied flux to the remaining legs, put a SMALL amount of solder on my iron, and heated each surface of the joints. The solder will flow off the tip perfectly to weld the components.
Point got to at around 3:55
This one leg at a time technique requires steadier hands than I have, and more dexterity, but I like the "poster putty" tip. In the UK, the good stuff is called UHU White Tack.
I've seen a video (which I'm looking for again) where a big blob of flux is placed over the pins, then the soldering iron is run across all of them on one side. The flux helps to stop the solder bridging between pins. I did that successfully once, on a 6 pin SMD chp. I wouldn't be able to do it the way this video shows.
A tip for repairing SMD connections that have gone bad from vibration or not enough solder on them from the factory or even very small pieces that aren't big enough to solder with a conventional iron because they're so small that they have a tendency to want to stick to the tip of your iron even with tweezers, is to use a heat gun. I've soldered many SMDs over the years doing repairs and had a few that were so small that using a soldering iron hot enough to melt solder on one tab also melted it on the other end which often would make the SMD stick to the tip of the iron. Using a heat gun that is able to heat up above 450F works great and if you get a miniature model that has a precision tip on it to channel the hot air into a space of 1/4-1/2" you can usually do tighter spaces without unflowing other joints. I wouldn't recommend painting flux on prior to using this method and would suggest using rosin core solder once you've preheated the solder connections first bringing them almost up to the temp needed for the solder to stick before trying to add solder to a cold solder pad and component. While yes the solder as it melts will transfer heat to the SMD and SMD pad it will not do it as effectively if it's not preheated. I've used heat guns many times with great success. They'll also help fix the red ring o-death you can get on an XBox if you know what you're doing.
i used to be a surface mount engineer for a company doing maximum 0802 max, wish i had kept my videos from 10 years ago!
how times change! :-)
@kildas its to desolder. Its like tape. You take a small part and you make a physical contact to where to remove the bad solder. On the other side you apply your heated iron tip and the solder will bond to the Solder Wick. You will need to trow away the used part of the Solder Wick.
JEEZ I build the optical theremin thingy for an English project in 9th or 10th grade, the board was 2x bigger than that board, speaker, and battery put together! I need to start looking into this!
fyi - solder paste does a great job of holding the component to the pads as well, and doesn't risk contaminating your joints. SMD isn't to be feared, it's just a new skill to learn.
Dunno the music is cool. Not great, sure, but sets the mood and goes with the Jamie-ness of these videos.
LOVED THIS VIDEO! PLEASE MAKE MORE CIRCUIT SKILLS VIDEOS!
Music was awesome, keep up the good work :)
THAT PUTTY IDEA IS AWESOME, WHY DIDN'T i EVER HEAR OR THINK OF THAT!!!!
Great work as always Collin.
Just a tip I use, low-melting point wax - such as from a birthday cake candle - to hold parts in place, this way, they can beheld in place and unlike the tac as used in this video you can use a hair drier to melt the wax and it'll flow away from behind the parts - less mess! And a neat professional finish when holding these tiny parts in place.
you can put blu-tac (putty) on a small screw driver and hold the part from above.
Did some SMD soldering without any poty(? the white stuff there) dint have a needle nose pliers, used a needle and had to reheat the 1st joint once or twice, still everything worked perfectly in the end.
Iv'e seen SMDs soldered to a PCB by heating small amounts of solder onto each point of contact and then the items are placed carefully on top and then it is all put in an oven that heats until the moment the SMD components drop into the solder but I like your method much more.
Amazing solder skills!
7 years later...with out checking date first i almost gave up on this guy entirely. then checked date and it made more sense....regardless of age of video flux would have been good to use.
Incredible.
Do you have any videos that offer in-depth tutorials on how to solder things? My soldering sucks, and almost never comes out right.
Collin is why I subscribe to @makemagazine!
An alternative is is to use a ceramic substrate - solder dip it, then place it on an electronics hot plate and place all components at once. With the smaller components it's easier to use a vacuum pickup pen. Weller makes some pretty good ones.
Go Collin! Awesome videos!
for the resistors and the capacitors it's easier to do solder on the board then take your component in one hand and your solderng iron in the other hand. Then place it while you heat de solder. In this way you can place them really quickly
That tack is by far way to cool, my friend Chuck uses a similar tack but uses it from the top with a wooden Q-Tip. I have been soldering SMD for 11 years, this video is well done. Collin is correct the newest and coolest components are only in SMD so it'is time to learn a new skill. Its not hard at all.
Try wetting the pads before you place the SOIC component on them. That way you reduce the amount of solder you use and makes for a much cleaner job. But as always, practice makes perfect!
freaking good video, thank you so much, look forward to seeing more in the future.
This is impressive. Good work sir
I did get the kit mentioned in this video. However the kit does not have the circuit diagram for the project shown in this video. Can you please point me to the circuit diagram?
Very useful video. I tried soldering and LEDS in the past and ended up overheating them.
Probably should have applied flux to the pads before soldering *anything*. ;)
The water-soluble flux pens are terrific, btw. Clothing pins (the kind with a spring) can be used for holding larger parts in place, but pre-tinning the pads - at least the corner pads for an IC - woks well, too; all you need to do is then place the IC, then hold the soldering iron tip on the corner pins long enough for them to seat into the solder. They act like 'tack welds', letting you solder the remaining pins.
Thanks for your insight
Check out hot plate soldering. Just put the board on the (switched off) hot plate, all your components and some solder paste onto the board, and turn on your hot plate until the solder paste melts.
Good vid, but please accept my tips: liquid flux is your best friend when it comes to smd soldering. ;-) And no need to stick components onto pcb. Just align the component and solder a single external pin to lock it, while keeping it in place with tweezers. Anyway I liked this video. Keep up the good work.
you make it look so easy. I can never seem to get my solder to cooperate with me
I've watched tons of SMD videos, maybe I have a tip?
What is the problem you have?
Very good video. Very instructive. A+
He Gives The videos and The Permissions to makemagazine to post
the greatness of this video is inversely proportional to the greatness of it's music.
wow you make it look so easy.. I'm jelly
Good video. Thanks!
Im new to circuitry but I really want to make stuff with it so I dont really know anything and I need help. Is there a video or a website that can tell me what the small parts and boards do and what are some what do they do and how I can add them together to make something and make electronics easily.
You don't want to start with surface mount :P
Start with regular sized components, the type of stuff that you see on radioshack. Better yet, start with kits, then move onto making your own circuits, then even your own pcb boards, then...THEN, do what I do and start building a robot to do this type of work for you! :P
You actually don't need the adhesive. Just "tin" the first pad by applying some solder to it, then use one hand to hold the tweezers and bring the component lead to the pad while your other hand holds the soldering iron to flow the solder already on the pad. Then remove the heat, and the joint will cool. Now your component is held in place while you solder the other leads. All SMD components with exposed leads are fairly easy to solder with nothing more than a plain old soldering iron!
I like your tutorials!
ye i agree. I worked a fair bit with SMD stuff and the putty just seems silly. It's soo much easier to just tack one connection as you position it
0402s are the most cost effective for mass production in 2017, but 0201s are close behind😮
It is better to put some solder on a pad then re-melt it with the component held on the pad, then solder the other end. 0402s are no problem with a bench magnifier. Good luck😀
I would like to make a suggestion: Instead of blue-tack, before placing a component, apply solder to only 1 pad of any device (regardless of how many pins it has). Place the component in place, and re-heat the same pad which already has solder on it. It will keep the component in place while soldering the remaining pins.
to replace that big 9v get a small 60mah lipos from blutooth sets or 3 3v button cells
I put solder on one pad, place the part with tweezers then heat the solder and slide the part into place. remove the heat and then solder the other side.... I do it as part of my job and it seems to work fairly well...
i made an fm receiver using smd fm ic chip and it works great :)
Great video!
Thanks for that!
Question - that trick with the putty/blue-tac or whatever that holds the tiny SMD components in place - can the same putty also server as a kind of solder mask to constrain the solder flow as well?
If the putty can withstand direct heat, then perhaps the whole board could be soldered using solder paste in a reflow oven.
+Paul Gross in surface mounting the components and amounts of solder are so small that surface tension from the solder is supposed to pull the pin onto the lead and into alignment you may not need that tack stuff.
If you are using the right solder at the right temperature and in the correct amount it should pull itself onto the the pin and the contact too.
+scot shabalam, I think you have misunderstood my question.
I already understand the tendency of the surface tension of the molten solder to pull SMD components into alignment with the pads, but that is not what I am asking about.
As I understand it, the molten solder flow is constrained by the *solder mask*, which is why each PCB pad tends to get fully covered once the solder is molten - the solder mask has been laid down to prevent overflow past the pad's border.
*My question is: Can this putty/blue-tac stuff also act as a solder mask?*
Can it withstand the heat of molten solder enough to properly constrain the solder flow to the pad boundaries?
When making UA-cam clips, it's always a good idea to put a noise track, which is actually louder than your voice, alongside your voice. It's a sort of discriminatory option, because it weeds out those people with slight hearing loss, who are then unable to make out what you are saying. Without the noise track, they would hear you fine - but what would be the point of that?
It's a shame, because I was interested in this.
What does the 1001 mean on the top side of the SMD? Is it the resistance in Ohm or something?
@legolord14 it doesnt hurt that bad unless you hold it on there for a long time
Tl555C vs NE555 is there a difference
If you want to solder but are scared, dont worry. Its just like using a stove or toaster oven. When you be careful and are responsible, you will be ok. Ive been soldering a long time and never touched my skin directly with the iron, but sometimes parts you are holding can get really hot. Make sure you buy a good seperate stand for your iron and not those tiny flimsy stands that sometimes come with them. Get a good stand with those big spring looking things. Also dont start with SMD..its too tiny
i love this guys videos!!!!!!!!
Music be super fantastic!
hey im not from the states and i was just wondering what coin he used to compare sizes around the 3 minute mark into the video
i could weld or soldier anything but but what would be worth making thats this small any ideas?
I forgot to ask where can I find proto boards from SOT-23 transistors?
What is that music playing while he's soldering?
I hate dealing with SMT devices!! But I still have to in my line of work...
it is a small chip but it's still HUGE compared to what you can find in cellphones
you got a good solder gun can you tell me where to get one like that because mine isnt neary that good
Belive it or not, my first soldering was SMD soldering.
hey, great video SMD electronics is fantastic , I hpe to see more videos like this !!!
I'm interested in building the late Dr Bob Becks blood electrifying device and have no experience whatsoever with circuitry. Can you recommend a forum or place where I might get some help?
Johnny Garza college
should have connected a resistor and a capacitor to the 555b timer to adjust the frequency
This device is solderable (Solderable GaAs Flip Chip Schottky Diode
: MADS-001317-1500) but so tiny just 0.031x0.017 inches be a half of your smallest one). How can we soldering it ? :D
You seem quite coordinated. Did you really get all those joints on your first try?
@legolord14 It is actually quite hard to burn yourself unless you slip and actually touch it for more than a gentle tap, it doesnt hurt a lot, or very much, you might get a 1st degree burn tho which isnt really bad
MAKE more of this!
Where can I get the music that is from 4:44 to 6:45? I just love it
That's awesome!
Didn't know for this kind of a gum that can hold the smd until your soldering it. I just used some cheap thermal silicon paste to put the in place xD
Excellent !!
thats actually really cool.
@BlueBajs lol yh and i think fi you somehow manage to wire it ll up correctly that it doesnt work at 2.66GHz
Could a photodiode be used in this circuit too?
ur camera has a great Super Macro mode