 Welcome to DeskLadyAida. Okay, hello everybody and welcome to DeskLadyAida. It's me LadyAida with me, Mr. LadyAida on camera control and also testing out a new AV system which should be no different. We upgrade over time. So good. So good. Okay, well you need your updates. You want me to just jump right in. Regular old shows this week and more. Come on by and show and share your stuff this week on Show & Tell and of course check out all the shows that we have all week long. What is on your desk this week, LadyAida? Okay this week on my desk is a lot of TFTs. So the chip short, pardon me, the chip shortage you know like I said has been getting a little easier to deal with and one of the things that's been more available are displays. The displays are one of the first things that just became ludicrously expensive. You know the prices went up like 300%. Prices are back down to normal and also you know since we were repricing all of our TFTs we actually sent out some you know quote requests and got another company. It's always going to dual source to have another company that could supply the same TFTs for us. So you know no matter what happens you know if there's lockdowns or companies don't have some parts available or they have different parts available we have another supplier and as I was doing this I was like well if I'm going to maybe like update and redo some of these TFTs let's also update the boards. So I thought let's maybe let's look at the TFT samples first. I have this big box of TFT samples right here and we can also just talk about TFTs and I'll show you the board versions I'm doing and then that'll lead us into the great search. Cool. That was nice. Okay so let's go so yeah so this is some of the TFTs. I just gonna show this later. All sorts of TFTs, SPI TFTs and you know TTL and more so let's take a look. So I'm just going to start with the smallest one so this is okay this is actually oh this is like the same TFT is the 1.8 inch 1.9 inch TFT that I use here so yeah it looks like pretty much identical you know that it's not exactly the same the FPC is a little bit different you can see but you know I'll test this in in situ so all you know I'll pop this out and pop this one in and just make sure that it works the same. Again always good to have multiple sources. Okay so that's that one. Let's see this. Oh this is like the two inch display so that's like this one. Let's look at the FPC connector so these without tearing apart the screen. Oh wait tore apart the screen. I think this FPC might be a little bit different. Let me see how it goes. No it's just the FPC is a little different but it actually ends up being the same length and size so that's kind of good so we'll test this one as well. This is a two inch IPS display that's kind of good. This is the I can already tell it's a rounded rectangle. This is the 1.69 IPS rounded rectangle TFT. These are all SPI TFTs so pretty much anything under 320 by 240 you know I tend to use SPI as the protocol. You know it works it works well enough and it can transfer enough data and now we're going to get into some other displays. This is a 2.8 inch capacitive touch so you can tell it's capacitive just got that nice shiny black top and this is the capacitive touch chip. One of the things that I like is even though it's not done I have you know I've kind of requested it because I saw it once is the capacitive touch actually the chip even though it's a separate it's a totally separate circuit you know the capacitive touch FPC is totally separate it gets soldered on to the main FPC and then instead of the four resistive lines you get SDA, SCL, you know IRQ and address or whatever coming out so it's like you get to reuse those four lines but they're for capacitive touch so this is this display is interesting because it's 16 bit or SPI you can see the pins that are available so we do use 16 bit mode on like the pipe portal for like high speed and you can also the ESP32 has a 8 or 16 bit mode it's just isn't actually faster I don't know 16 bit is it is a bit faster 8 bit it depends okay this one okay this is a 2.8 inch resistive so you can see it's got the same you know basic connector but this one has the resistive touch panel and this one has capacitive so two two options and these should be drop-in replacements for the current displays we've got which will should be nice I kind of I don't like to change chipsets or connectors it's a lot of work to update okay let's see what else we got here okay more displays these are oh this is cute so this is the 2.4 inch display and also a capacitive touch version which I've not had before so this is actually kind of nice the current supplier we have of TFTs did not have a 2.4 inch display option so this is pretty cool we'll be able to update the display maybe and have a capacitive touch version as well as the resistive put this away and this has the same connector as the 2.8 so just you know I use the same connector pin out okay 2.8 inches 2.4 inches this is a 1.3 inch this is a 1.5 yes is a 1.3 no 1.44 this is a classic 1.44 128 by 128 display this is like the OG TFT SPI display used in pocket like this little keychain image viewers from like 10 15 years ago that's what they originally used for that's you know then they became popular for hobbyist purposes is there any benefit from resistive touch over capacitive it's much cheaper for sure resistive is cheaper this is much much cheaper capacitive usually adds 10 bucks or so it's pricey all right any other reasons that one would be better the other some people like the pressure but you know most people like capacitive okay here's another round wreck display well you know we use this this is actually yeah 1.47 inch and I think it's like 240 by 150 or something it's a very high resolution IPS display and then this is the 1.3 inch IPS display you know very popular we use this on the clue and a bunch of other boards and then this is the this is the standard 1.5 inch display so classic also used in a lot of different boards let's see what uses the 1.5 inch of the monster mask the Halloween uses this display one here another 3 1.44 so I'm gonna put all these SPI displays in here there's a lot of them it took about a month to get all these samples by the way you have to really you have to look at the data sheets and you have to approve them and then takes a while okay so that's that all right here's some more larger displays okay so now we're getting to the chunkies this is 3.2 or 3.5 let's see is this 3.5 so this is the largest SPI display we we used it's 320 by 480 again one with capacitive touch that's nice I think I don't know that we had capacitive touch for the one well for 3.5 I know we did for the 2.8 3.5 I think we didn't and then here's a well I'm not gonna pull it out but this is the resistive version so capacitive touch resistive touch again pricing differences we'll determine which one we go with okay so that's that okay now now we're gonna do the big one they're getting bigger and bigger as we get deeper into the the bin this is a 5 inch display resistive touch so at this point we no longer use SPI we use now a 40-pin TTL connector you know for this a Raspberry Pi can drive it the ESP32 S3 actually has a peripheral that can drive not all 24 bits but 16 bit color it can do for a zoom out because it's getting kind of big so this is 5 inch and this is another 5 inch one of these is I guess sorry this is 4.3 inch so 4.3 inch also this is the TTL display 40 pin connector standard 40 pin connector we have an HDMI TTL converter and also the RA8875 can you know drive this drive these displays but you know there are a lot of the a lot of pixels like 800 by 40 so you need you need a lot of bandwidth okay and now capacitive touch version of the 5 inch this one you know they didn't do the thing which where I wanted which is you know this would connect through to here I'm gonna ask if they can do that but they might not because it looks like this is a 10-pin connector and they might be like no there's actually not enough GPIO you need more GPIO than the four pads that are afforded to you here yeah whatever so check that out and then really like two more to go 4.3 inch capacitive nice see now this is bring into the chunkers so this is a 7 inch capacitive this is 7 I don't know the resolution it could be 800 by 480 or it could be just gonna be 480 by 800 or it might be 1,000 by 600 I think it's 800 by 480 though also separate capacitive touch fpc and then this is probably a 7 inch resistive yeah 7 inch resistive interesting at some point they also sort of give up on trying to make this one connector and they're like look the resistive is on a separate connector can be used can be just too difficult to get the sizing right all right so that's the display bonus display at the bottom here oh my god what is this beast oh this is a iPad display so replacement iPad display I think which or maybe it's a 10 inch IPS yes a 10 display all right huge pile of tfts I have my work cut out for me all right that's a saying people still use when we put this all away all right you want to roll into the great search well I'm gonna show off one quick thing but I just thought you know it's gonna be fun to show people all the different tfts I don't know if you're if you're somebody who wants to put a display on something now you know all the options all of them okay so yeah we're gonna quickly show off these boards so what I've been doing so you saw like I had this gigantic pile of tfts so what I've been doing is you know the newer tft displays have a I spy connector on them which means that you know you can solderlessly connect it's kind of like a stem acute connector with FPC but some are older displays you know I didn't I hadn't decided to do that yet because this is from like 10 years ago 12 years ago so this display you know doesn't and this display doesn't but since I'm you know maybe updating the tfts I was like you know why maybe it's a good time to also update the especially if I can get IPS versions I thought it's a good time to update the display breakout so like for example this breakout here you know there's a space that is available so I added a I spy connector here and you know I have it running off of a QT pie board I made a little I'll right get four and so you can just connect it up and I haven't do the test you see I'll restart the test and then you know it's kind of nice so it's a very actually it's actually kind of nice because the faster way to test than to solder and connect all the pins and headers this is a you know how I can check all of these boards very quickly so you know as I go through that gigantic pile and approve them you'll also see updates to all our tfts because I do want to you know one of the things that is you know I'm trying to get towards this like you know less soldering or no soldering required to build a lot of projects you know the QT pies and the stem and QTs are a big part of that I spy is gonna make it easier to do display type projects so let's go to the computer so I've got you know a couple of the most recent displays you know the 1.9 1.47 1.69 do you have the connector and then of course recently we put in the connector breakout but I was like oh you know now that I've got kind of a I'm kind of going through and doing this let's also make a accessory for the Raspberry Pi to connect displays because we have the pie tft and stuff but it would probably be you know there's a lot of people who are like I want the Raspberry Pi mounted elsewhere than the display or you want like you want to build a project where it's separated where you have an ink or something so it's like you know sometimes it makes sense to have it attached to the back but sometimes it doesn't so and this is what you know that the pie tft looked like you know it's like you plug down to the Raspberry Pi so you know I thought I'm maybe designing something like this where you know it plugs this is like the 2 by 20 header that plugs into the top of a Raspberry Pi and it's like a little it's a little shim little strip and then you get I really only wanted to have the I spy connector but then basically it's like you used so many pins that it didn't like it didn't make sense like once you go past like 12 I was like I you know what I should just have it be like all the GPIO so then I asked Mr. Lady in it for some suggestions like well maybe put a slide switch on there or two buttons and you have a 7qt connector so it's like you can make you know a couple different projects maybe select different modes you can use a slide switch maybe an on-off switch type thing and then you know this would allow you to connect any of our tfts again without any soldering or you know effort you just you just be able to plug it right in so that would be and then we super handy so that's that's gonna I'm gonna show you out in this you can see I've got a couple more air wires to go but this will support our e breakouts or tft breakouts OLED breakouts whatever and then as we add more and more displays because one thing that's nice is that there's always like more displays being made that you know from from having like they somewhat crummy 128 by 128 1.44 inch tft it's like every month now I look there's a new tft that's on the market that's available that's low-cost that's SPI that could be a fun little accessory for a Raspberry Pi or something so this is the board I'm working on this weekend is sort of like incentive for me to get all these I spy redesigns done yay but as I was doing this one of the things I thought I would do for the great search is show how to find this 2x20 pass-through connector that I really like to use so that leads us into the great search the great search brought to you by Digikey and Adafruit this is the time of the week where the data shows you how to find the things you're looking for on digikey.com what is a great search this week Lady Eda. Okay so this week I was just chatting about how we're redoing a lot of our tft displays and we're adding any little connector that will make it easy to add a flex fpc to not require any soldering for attaching a tft display to a project or product and so on the computer I can go there I designed this board that has the fpc connector here and then it connects to a Raspberry Pi header you can just plonk it onto a Raspberry Pi header the ideal is would be fully assembled no soldering is required and then you know you plug it on to a Raspberry Pi or actually any single board computer with that 2x20 header almost all of them now have the same standard header which is like pretty sweet and then you would be able to plug in a tft display so like just less work less wiring effort and people are always kind of struggling with wiring this will make it so you know the flex sector goes in you're good to go so this connector we use in a lot of our bonnets so let's look at our bonnets so for example this is a pack so this voice bonnet for example so this bonnet what we do is we like to use a slim 2x20 connector on the back and the reason I like to use these slim style ones and their SMT is one if you're doing SMT there's no hand soldering like it's even though these characters are like kind of chunky and like hand placing limit you know sometimes it's required they come on tubes it's still a lot faster to place it and put it through the oven than it is to hand solder 40 pins especially if you don't have a selective solder machine so for you know or even if you do it's it's a very labor-intensive it's a very messy process so you know using these slim 2x20 headers is great see if I can see another thing that's nice is that you can have these plated holes up top and then you can actually stick a stacking header through so something like this this extra long stacking header these pins go through the SMT header and through that holes like the SMT legs go out so that these long legs can go through it means that you can stack multiple boards if you'd like as long as there's no pin incompatibilities or you can probe or you can attach other accessories I think the the sense hat also did this if you look the sense hat similarly has a 2x20 connector what's interesting about how they did is actually they to save on assembly costs this header here on the bottom actually is through hole and it sticks through and you can kind of see the little the pads maybe it's kind of tough to see yeah here you can kind of see you can see the legs stick through and that's how it attaches it actually saved a little bit of money because they didn't do a double-sided process it's a one-side process SMT on the top and then just somebody before they package it they stick a 2x20 header through the pins go you know through the PCB through the header and make contact and some it's actually quite mechanically strong so it's another hack again to save money you know a little bit less assembly cost because a single anytime you do single-sided SMT is worth it only trade off is you know SMT headers are gonna be more expensive than through hole headers they're not as common and again you know they're often don't come in a tape-and-reel you might be able to get them tape-and-reeled but they often come tube or bulk is just so long so let's go to did you key and find this so I want to find header and you know this is the closest image I do like the new image search so it's a it's called a female receptacle rectangular connector because I never quite remember the difference between like board to wire wire header connector rectangular I just type in header and then I just click on the image that and then oh yeah that's right that's what they call these there's like a quarter million different items but we're gonna we're gonna get through them very quickly so number one we only really want active or preliminary so we're gonna select those and we only want to grow because we want the 2x20 connector so let's apply that'll cut it in half great next up is the number of positions and we want 40 remember it's 2x20 so the number of positions total is 40 and then number of positions loaded is good to be all you're wondering like why would you have sometimes not it's actually not uncommon for there to be one pin missing because it's the key pin so like if you remember floppy drives I think or like IDE drives they had one pin that was like filled in and that way you couldn't plug in the connector upside down so the only thing about I see connectors is like it's kind of easy to flip them upside down but we want all of the the connectors attached and then how we look in so yeah these are looking pretty good these are all through a hole so now oh here's one SMT so now we want to find surface mount so we want surface mount not right angle we want it to be pointing up and then the pitch that's important so we want point one inch by point one inch so mating pitch is the pitch down the 20 connectors and the real pitch is the distance between sorry the real spacing is this is between but it's gonna be square point one inch by point one inch there's already down to like only 500 options so let's let's take a look alright so yeah they're looking pretty good so big low profile ultra low profile a lot of good options here okay so the next app some of these you have board guides next up let's only look at normally stocking although I will say actually let's not look at normally stocking because actually there were a few things that were not normally stocking but maybe if the lead time is you're with the lead time it's worth it so the next thing is the height the insulation height so some of these are quite tall they're the standard seven millimeters high and remember we want to actually have it be slimmer so you know not too picky about the height but I definitely don't want to be like the eight and a half that normally is so I'm gonna say you know maybe five point two or less height you know basically those those legs of the the stacking headers have to make it all the way through and then you know let's say we're gonna quote it at about 500 pieces and we're gonna look at the options so again some of these are they're not available they're not in stock but they are a little expensive this one in particular was like it's kind of cheap and it actually looks pretty good but it's not in stock and it has a lead time of four weeks I think yeah so you know the question is you know what was nice is that the price is low it's like you know $1.28 which is a really good price for a 40 pin header but I'm gonna have it in stock right now so this might be something where you're like okay I'll for what I go to manufacturing manufacturing I'll get this but for now there's this one actually came up in theirs it's not you know not too expensive it's a couple dollars and it looks good this one was nice and slim and one thing I'll notice that you do watch out it has mounting nubs let me see if I can you can see the mounting nubs here so there's two mounting nubs which are actually not traditionally you know I didn't normally used to have these on the headers but now you see I have to make a little you know it's a two millimeter hole and so you see that it actually affects the size of the annular ring around my through hole that would go through so instead of having it be like this nice chunky annular ring it's only a five millimeter annular ring you know it's a little bit close to the edge but it's it's okay I think it'll be fine but the mounting posts are good because especially if you're gonna have someone hand place these it just makes it so they don't skew you know it's like what's they sit in place they're good to go so this one is actually pretty nice and you can tell it's definitely hollow and you can see through it which is good that means those long pins will enter through and exit at the top so this is my pick the Harwin M20 781 and it's in stock right now and that's just a line in a great search okay 30 minutes but yeah a couple people said funny the topic is live been thinking about various displays I was looking for low-profile connectors looking for a stockable 7-pin today so right before we do the show you know that thing in the professor X has you put the helmet on the helmet would like to look like that stick out yeah so whatever everyone's searching for that's how we I can actually see everybody so well it's it's it's to the according to the terms of service of YouTube you agree to have all of your thoughts broadcasted yes so we just built the machine that can yeah receive those or like the Riddler and Batman 2 yeah yeah okay all right well I'm reading your thoughts and finding your parts all right so that's the Descalade 8 of this week thank you so much everybody for stopping by very much appreciated we'll see everybody throughout the week for a bunch of cool shows projects new products you name it we'll be doing it together yeah if you have a great search requests send them in can always go easy email me ptdatafruit.com email ptdatafruit all right thanks everybody have a great week