How To Solder SMD Correctly - Part 1 /SMD Soldering Tutorial

[Music] hi everyone and welcome to my latest video this one's just a short guide on fitting the basics of surface mount devices so basically i'm going to be going through 1206's captain resistors sort of 805 size 603 right down to the o402s i'm then going to be say fitting an soa ic got a voltage regulator i've got a shot 23 there and a couple of leds below it and i'm going to finish the video with this 100 pin quad flat pack which uh yeah i'll show that right in sort of quite fine detail so yeah what you need really a couple of fine pairs of tweezers um i've i used two different types of solder for it different sizes i mentioned them and yeah i'll show everything step by step so they should be pretty clear so what i'll do i'll get straight on fitting the 80805s and uh hopefully you'll sort of learn something from it and uh yeah hopefully enjoy it come to the sort of fitting the first components uh for the video well all i'm going to do on this i'm just going to fit them 0805 um resistors and capacitors to these two positions you've got c50 and r82 this is why i like to do it i know some people basically they like to put a blob on one end and then sort of uh attach the components to that blob and then redo the other end this is why i like to do it so literally i'd put a little bit of flux on the pads so you can't really do this without the flux and i'll drop the components into position so you've got your capacitor and your resistor then what i like to do i literally like to just tack one end on because i think this way you get sort of a better feel for how much solder you need if you're looking for a sort of a joint that's sort of curved from the top to bottom like a speed slope okay so literally i tap them into position so they're nice and central to the pads all i do then i go to the other end and just solder that properly so you're looking for a nice curved joint top to bottom same with this one and then i can go to the first end and revisit that and do it so properly same as the other end so that's what you're looking for a nice sort of curved joint i'll probably clean these up so you can sort of see uh see how they are but yeah if you can get these joints sort of nice and uh sort of uniform and sort of nice amount of solder this will enable you to do the harder components in the future so i've got there i've got sort of a nice little curved joint and down same there so you've got four nice joints nice and central components like i say if you can get these joints not bulbous they really help you when you to get to the smaller o402s and you'll find prices so what i'll do as always i'll put photos of these up at the end but what i'll do now move on to other components for the video and here we go from there so now we move on to some sort 23 diodes basically i'm going to fit a z4 and a z5 in position there this is literally done the same way as i've done the resistors um beforehand and the capacitor all i do a little bit of flux again so it's pretty vital to flux and what i do lift the component into position again i don't sort of block one pad like say some other people do but this is just the way i like to do it so i'll get a little bit on the iron and i normally tack the bottom right hand corner of these one just put a tiny amount on there just to hold it into position same with that one so i've got a nice amount on the corners and all i do then just get a fresh bit of flux just to avail it all when you're sort of doing it properly and then i can go to the other end first i'll normally just do this one first and what you're looking for you don't want too much on these you just want you can even see the outline of the leg and that's fine so if you can get these nice that really help you in the future on on the fine pitch stuff like i said earlier i'm using lead free solder that's why the joints are a little bit sort of duller than normal just yeah if they're really really shiny joints it tends to be where people are using leaded solder so i do just give them a quick clean and you'll sort of see the amount i've got on there but yeah i'll say if you can get all these sort of nice and uh little uniform not too much solder that will really help you in the future so as you see i've got a nice amount it's all four pads at the front this back two are the same and that that's basically how i fit my sock 20 freeze so i'll do now move on to some other components and uh i'll show you how to do them right so i'm quickly going to show you how i do my sort of led diodes so basically the same again for a little bit of flux on the pads and i'll just lift over the components as you can see there's a silk spring dot to this end of the diode now normally that denotes the cathode which is on this particular component is the green band because i've sort of looked at the data sheet but um yeah some designers have sort of decided to make that the anode so it's well worth getting a sort of data sheet up to make sure you're fitting it the right way around and it i'll do these exactly the same as i do my 805 resistors and caps as sort of earlier in the video i just put a little bit just them both in slightly to tack it on just don't need a lot really on there and we do then so visit the other end and do that properly similar amount to earlier so you're looking for that nice little curved joint so you don't want too much on these the same end you've just got to watch the potty body on the top for these particular components i'll give that a quick clean and what i tend to do after i tend to light them up just to sort of make sure i've got the right polarity so as always i'll clean these up and sort of put photos up at the end just get a little bit of flux off so i'll do now just light these up just prove i've gotten around the right way so as you can see that matches the dot and that one as well so they're around the right way so what i'll do now move on to something else right we come on now to an s08 ic so i'm going to basically fit you free now i've changed the camera angle for this so you're going to get a really clear view of the joints at the front so basically what i'm going to do as always a little bit of flux on all 8 pads so i've made the camera angle a little bit different so you'll get a real clear view of the the front four pins so what i do all i do here same again i do literally tack any sort of two pads on one on each side and do one there and one there so check your polarity make sure that's that's correct because you wouldn't believe how many times i've seen people even myself have done that so now just go around near the front four you're not looking for too much you just want it to run along the joint and around the back of the the heel so it's a little bit coming out the back same there so you don't want too much on them you just want a bit a nice fill it so a little bit of sloping at the front and so it runs along around the back so yeah literally i've got a nice soy joint you can as you can see i've got a nice little joint around the front so down there nice amount you don't want too much and i've got a similar around the back which obviously i'll take photos after and clean it up and so you'll see all them as well so that's what you're looking for you're not looking for loads of solder because when you get to the fine pitch stuff this is just you know this will really help you it's all i do i'll give it a quick clean and then i'll put photos up at the end but say that that completes the so8 so what do i move on to something else all right so following on from the s08 ic that i did which was rather a large component i'm now going right the other way down to the 402 size resistor so again i'm going to do add me flux over all the pads and what i do basically attack that into position with the tiny amount so these are really small so hopefully they're staying to focus so you can sort of gauge what i'm doing they literally put a tiny amount on both just getting really central so these are generally the smallest resistors you probably have to deal with we do do 201 sizes but they're yeah they're basically not use that too much so uh this is the most common small size so what i do then go to the other end and as with all my two-sided components just add a tiny amount to the other end that's all you need i'll show you these photos after so you'll get a clear idea of what these finish up like it might be quite hard from the camera angle so please bear with me so that's all you need i've got a tiny amount there i'll give them a quick clean up so hopefully you'll see where sort of a better idea what they look like let's give them a quick clean so yeah almost so double-sided resistors caps sort of any sort of tents always do me two-sided two-ended components the same way just add a little bit to one tac do the other probably so as you can see i've got a nice curved joint all down top to bottom it's the same the other end like i said i put some photos up after so that's what you're looking for on the o402s so i'll do i put a few photos up with the ones we've shown so far and then i'll put a few more videos up after them [Music] [Music] all right we're going to start this second section of videos with a quite a large voltage regulator obviously a lot larger than the 0.402 before the uh before the photos so i've done if you get anything like this you can see on this one here this one's actually connected to the plane all around it and that's going to make that difficult to solder because when i see people soldering these they just get generally a bit run right up the end but don't really spread across the pad so what i've done on this one i've actually this isn't joined to the plane but this is just if you're struggling this is what you want to do i've literally tinned this we've sold already and wicked all off so i've got it nice and flat and so when you solder the end it will more easily spread under the body and join the pad underneath so that's that's a good tip basically if you're struggling to get the solder to go beyond till the end tin it first wick it off and obviously uh it'll make it look a lot easier so what i'll do now put the component on and i'll show you ourselves so we come on to the first end of the regulator so what i do as always a little bit of flux so what i'll do i'll slide the component into position and then i'll get these two generally soldered up the middle one on this component middle leg isn't actually used so you will find some of these do have the middle pin missing so i can do hopefully it stay in focus because i've got to change my iron bit for this i've got a rather large one to help with basically with the other end i do get that central and then solder these up properly so hopefully this the focus is staying you'll basically hopefully you'll see the amount i've got on these you just want it to run around the sides around the hill so you've got quite a nice amount sort of going up the sides right round to the back of the hill so that's basically the first thing so what i'll do now just turn it round and i can solder up the other end so as you can see you don't get a lot of room on these components at the end that's why if you pre-tin them like i did a minute ago it really aided you so gain a little bit of flux so when you get a ground plane on these components you might need quite a large tip so i've got actually got a large tip with a flat side on it so i can then do just turn around a little bit more stand on its side and this when this takes it'll go really nice just takes quite a little while to go what i know because it's already tin that's going to run really nicely underneath just literally that's all i've got to do as you can see you've got a lovely joint right around the bottom it's gone really well right away along spread underneath because it was already tinned so that's basically what you're looking for in your regulators so yeah if you're struggling like i say pre-tin it and that really aid you that's what i do now i'm just going to move on to a few components that i've already put onto the board but they're just more examples of double ended components just to see you know what the joints look like all right so following on from the voltage regulator all i've done here i've literally already sold these on properly just to show you so what the joint should look like so yeah these are basically 603 caps down there so as always like you can see the curved joint going top to bottom the same the other end there you got a couple of 805 resistors same again there's a big cap 1206 cap up there's a large tent up there as you can see all the joints are sort of generally the same sort of shape and all i do exactly the same all my two two ended components i do all the same way as in previous videos no matter what the size so that's generally how i do them so um yeah you know it's uh it's a good method and like i said don't pre-sort in or pre-blog the pads like some people do but it's like everyone's got their own preference but this is just the way i like it to uh you know to get a nice joint so yeah what i'll do now i'll move on from this i'll lastly i'll show you the quad flat pack hundred pin and uh yeah after that put a few photos up and uh hope you enjoy it all right so this is where we finally come on to the last component i'm going to fit for these videos um this is a 100 pin qfn or quad flat pack basically what what you do first basically put it on your pad to line it all up i've already tacked a pin around the backside in this corner so i'll do i'll tack a pin on the on the other side the opposite side and then i'll show you how i fit sort of do the joints it's basically all i do run a beader solder sorry reader be the flux around that side just put a little bit on your iron you just want to attack one corner on the opposite side to the one i just did a minute ago what do you take any sort of pin on this one so let's take that into position then i can just literally run down the uh the joints from this holder i don't drag solder like some people i do individual pins hopefully you can get us a picture of what i'm doing it's quite hard for the camera angle i can sort of just go along nice and simple just feeding a little bit in all the time doing maybe one or two pins at a time and that's that size all soldered up got a nice little fillet on every joint so it's running around the back and that's as simple you know as a as it can be really i don't like to drag solder because i'm always a bit worried about the pins so i'll do i'll turn it around i'll do a different camera angle for the second side and uh hopefully yeah hopefully it goes right right so coming to the second side what i've done i've changed the camera angles hopefully you can get sort of clear view what i'm doing so again run a little bit of flux along the whole side and all i do again is literally get me iron do one pin at a time in and out in and out in and out so if you catch two pins at a time no problem i'll get a nice little sort of bead of solder right around both sides of the joint down round to the back around to the hill and that's literally how i do you know basically how i do the second side it's a yeah it's a good option this i say i like to do the pins individually so you know if people like to drag solder that's good that's fine um but at the end of the day everyone sort of gets their preference this is just literally the way i like to do it all right just now onto the third side so again just run a little bit of flux all down the side and then say do the same as the first two sides just do each pin individually i've already tapped one the corner on this one that's always do go in and out in and out in and out it's not a lot longer than drags holdings just you know i personally find it a little bit safer so there you go it's that simple all right so finally we do the fourth side so again a little bit of flux the flux is really important with soldering you must you know i'm not sure where to use it just aids the soldering so much so again same again in and out it's just you know this is just a good safe method for for everyone really you get the odd deal short but you can easily remove it that's it that's all four sides done so i'll do now i'll clean it all up and uh put some photos up and yeah i hope you enjoyed all them videos and um if you did you know please sort of like and subscribe and uh i'll see you again soon yeah hi so yeah basically just wanted to record this little bit of extra video for this last ic placement i did um yeah right at the start of the video i think i said it was called the qfn it's actually the qfp ends like no leads and this one's obviously got leads so this is actually qfp so i just thought i'd sort of correct it save everyone messaging in there's just a couple of other little points i should have really said basically if you can get yourself some 0.25 millimeter solder that will really aid you when you're fitting these uh it's available from a company i use called blt circuits it's based in england and also one other thing that is really helpful for this is sort of basically get yourself a small conical tip for your iron and that's what i use basically you struggle with a big tip doing pin by pin so that's basically another good tip just get a conical one and uh yeah you'll find it a lot easier so anyway i hope you enjoyed the last video and um yeah if you did be great if you could like and subscribe and like i said earlier i'll see you all again soon thanks a lot [Music] [Music] you

Channel: Mr SolderFix

Views: 328,237

Rating: 4.8662229 out of 5

Keywords: how to solder smd components, introduction to smd soldering, smd soldering tutorial, smd soldering techniques, how to solder surface mount, smd resistor soldering, how to solder smd capacitor, how to solder smd IC, soldering tutorial, how to solder smd, smt soldering tutorial, smd tutorial, smd soldering, smd soldering like a pro, how to solder smd correctly

Id: EW9Y8rDm4kE

Length: 19min 14sec (1154 seconds)

Published: Sat Feb 06 2021