 okay hi guys now this is a this is a this is a this is all these little like mini oscilloscopes this is a DSO 138 now I've built a few of these about 11 11 or 12 of them the differences with this one and I never thought really to make a video before I'm doing it and it was quite a long drawing out on there there's quite a few there's quite a big old bundle of components here for these balls but the differences with this one this is the new model this one claims to have better noise or less noise on the signal it's updated firmware and also this one you solder the SMD parts there's a nice seam here which needs to go here and there's the SMD resistors that need to go on so pretty much everything now seems about the same these little feet and yeah everything else seems pretty much same it it almost looks like the the quality of the LCD screen has improved I've got some spare old from the old in the older model I mean the older model is okay but don't get me wrong these are not real oscilloscopes I mean they're basic very basic functioning and they're not like a they're not like a high quality one now I don't know if you can see there's a slight difference in shading if I turn that same way round there's a slight difference in shading that screen looks slightly bigger it does it looks slightly bigger no bigger in width but bigger in length not by much really talking maybe four mil but slightly bigger the board itself is the same size they both say they're 2.4 inch TFT LCD screens but they are different models or what you can see there underneath this flap that says 13700 oh it's just a part of them and this one says 13700 as well so so there's no real difference there it's just my imagination even though they did the actual screen itself does look slightly bigger yeah I'm gonna go by that that is slightly bigger maybe it's the encasement slightly bigger or whatever there is a slight difference in that and I think this this red looks a bit nicer than the orange so anyway yeah so I've never done SMD before I have got some kits in my drawer back there of future kits to put together and they've got some SMD parts in there trying to see what else we got so there's a little that's the voltage regulator SMD you got this IC here that's SMD I just hope now that's some of the videos I've been watching tutorials on SMD work I hope I was paying attention because I'm about to put into practice well I will put a couple of these things on in like real time on the video but I'm not gonna you know I'm not gonna bore anybody with the whole thing being in real time and to be fair I've got a couple of videos that I want to watch and about tubes uncle Doug on YouTube absolutely fantastic and I'm gonna have that on in the background while I'm doing this that's not how I'm actually gonna watch those videos I just want it to be able to be on in the background there's one way again so I'm ahead while I'm concentrating I will watch it with great you know using all my concentration so yeah I'm gonna go and put the kettle and make myself a cup of tea I can hardly see these even through this magnifying glass I'm looking through I can hardly see these and so I just hope I just hope that you know I picked up enough watching the videos TX bench I watched his video on SMD I watched I've watched a few actually on SMD so we'll have to see if I was paying attention or not before when I've been doing these it's always been these little capacitors that have been the struggle because I will insist on checking all the components as it says per the instructions of assembling these boards that you want to check everything all your resistors everything so today's gonna be a rock the rule of learning curve for me because I've got to check these components before I put them on according to the instructions you can't check the ICs and they should've got some you know the correct equipment which I don't have for doing that but to be fair in practice I don't check everything I really can't avoid I just take it as everything's gonna be there and if it is missing the capacity unfortunately I've got lots of spares now because like I said I've done these eleven or twelve of these but not this is the new model I had a breakthrough for a little while because I got upset with the person who was selling them to me because they started selling them assembled competing against me so I didn't want to play with them anymore I had to wait until I found somebody else no good price but I didn't realize I was gonna get a load of SMD and now I don't get it at any cheaper price than what I was getting before I just get a lot more work because I've got to get all these on before it used to be all these were pre-put on and I only had this to do now I've got to do this and these and I bought a bunch of them so there we go DSO 138 SMD work got to be carried out by me virginity to be broken on SMD and if I manage to do these and I'm happy with it I can crack on and do the other kits that I've got because the reason I haven't done them is because I'm scared to do these but I've got no choice but to do these and I just want to sit with a cupboard full of them and we never do anything with them so this is where I practice this is this is where I'm going to learn through you know getting it right or getting it wrong how to do it but I've not been there and you know the last month or so I have watched a couple of few videos on SMD so I've picked up one or two things and like I said we'll see if I was actually concentrating or not see how much of a mess I make at this right I'm gonna go make me cup of tea first though so I'll see you in a minute I thought just before I start I start doing this I just give you a little look at the now this is all new I never used to get one of these yeah I get this bit because this is the bit where you calibrate the probe and such which is it's pretty straightforward I mean the whole kit is pretty straightforward it's just quite a few bits to it but this is all new so this is a good one because they've given a breakdown of each part of the circuit and voltages so you can go through it bit by bit now fortunately I mean I say fortunately for me I've not had a single problem with any of these it's always been first time boot first time go very very happy but I have seen on YouTube a few people have had issues with these so so this is good this is obviously a response to a lot of these people have had to give them places to be able to do some diagnosing troubleshooting on what the problems are so that's great that's new to me this is just basically you know all your parts here's your resistors all the different resistors and where they go same for the jokes diodes you know pretty much self explanatory there and the user manual it's everything is there there isn't anything missed out as I've had these before and again you got some brief block troubleshooting here which is what I used to have before this part's the new part this is the new part this is what you never used to get before as well and this is the SMD part list which it doesn't look too much got six three that's nine plus a force first 13 17 18 19 20 23 just 23 SMD parts do you want there yeah that's the voltage regulator that's a good guess one yeah there's three ICs and I got three ICs probably got three ICs one two let me just IC we go L.O.A. for T.L.O.A. for NLM 1117 and STM 321 I think that might already be on here I think that's this STM 32 yeah that's already on there so they've put the IC on oh I hear both and sold as well as that because that's that is nice that's the nice stuff that I mean it's just it says you don't expect you wouldn't you wouldn't expect it to be it's not our focus is it honestly is Microsoft camera absolutely life cam that's what it is life cam HD you can't focus it it doesn't focus at least for my other one this went wrong with me using the other one but at least then I get to focus on the front if necessary I can twiddle it but on this one I can't twiddle anything so yeah I was hoping it was going to be a list of the improvements but I was actually looking on the website for that there it is and I'll put it over here and I'll tell you what it says