 All right the great search with digikey every single week late 80s is their superpowers of searching the digikey site to find a type of electronics and parts and more that you're looking for you need everyone needs and With billions of parts you got to figure out how to find them. So what is the great search this week? Okay, the great search this week is going to be on micro SD card holders Is there a common little accessory that we like to put on boards and a lot of people like to put on boards Why because you can get a micro SD card anywhere. It's very standardized. They're very inexpensive. They come in like every Capacity you could ever need like gigabytes down to like a couple megabytes if you really you don't need that much They're easy to interface with every micro controller micro processor has a library for interfacing with SD cards So if you need storage SD is definitely the way to go but you need to have a holder you need to have something that you plug that SD card into and I realized while we're doing this design that it's actually kind of not intuitive all the different kinds of SD card holders That are available a little different than battery holders even though they look similar so before we Go to the great search technically let's go to the overhead real fast and I want to show off the difference Kind so when I talk about them, you know what I'm talking about. So this is a micro SD card This is a common little Do Hickey it's got eight pads on it You can talk to it via SDL or SPI and check your micro controller libraries for which one you're going to use This is a common holder that we like and I'll show how we find this one But what I like about this one is it's push push. So you see there's this loose card and you push it in And it's clicks in and then when you push it again, it pops out Nice thing about this is it's like I find it like oh, it's like you push it in and it pops out How convenient there is this problem though, and of course it won't happen now, but like Yeah, actually it did happen you you do it long and it flicks across the room, and I'm never gonna find that SD card It's okay. It's a blank one Thank you, Mr.. Lady For for finding the SD card I had a spare So this is a you know another another version again push push same card holder and then This is a tinsy board and this has a slimmer one so what what's nice about this one's you can see physically It's slimmer. It's a much smaller Holder because to fit between these two headers. This one is not a push push. It's a push and then pull So I have to pull it out Which one's easier? I don't know I mean like some people like one some people like the other the Raspberry Pi used to be push push and now They're push pull So you see you have to push pull There's one thing if you have a push push type and you pull it out It can kind of get into this weird like confused state where it's like why did you just pull like it'll let you pull the SD card out But like the spring will be like Confused and you'll have to like push it in a couple times for it to reset what it thinks it's doing But now that we've you know looked at the two different kinds that are I think the most important Let's go to the computer now. We can really Great search it out. Okay, so Let's go this is that the carbon will start from beginning So one thing that's interesting is if you type in micro SD card holder, which like, you know, you'd think you would do It actually comes up with no results that's because these Like you know, we've talked before sometimes Mechanical stuff, especially is in a place. You don't necessarily expect it Card holders are actually under PC Card sockets, they're actually called memory connectors How are you gonna remember that? Well, you watch the great search and you remember it's called a PC card socket So the PC card socket area. It's it's it's kind of a busy place You've got and then we'll get card type here You've got the MMC SD. You've got memory stick nano sim Micro SD and sim the combos that you can get compact flash If you're designing some of the compact flash, I feel really sorry for you, but you can get those fax modem socket PCI sim sim PCM CIA Secure digital so there's a lot and the thing is it's a little confusing because you'll actually see the same thing up here a Couple different times like for example micro SD has micro SD and UFS Why I don't know. There's also micro SD up here. There's also mini SD, which is actually different It's a it's now a dead standard. There was a something in between micro and You know full SD card The rest are these sim cards So, you know, there's MMC, but multimedia usually that means the large SD card Not here but on other sites you might also see this called trans flash or TF card Why so many cards? I don't know the card itself is standardized everything else isn't that said I think we've picked out all the ones that say micro SD So let's apply. Okay, great So now we have 131 to look at and we can start looking at images and say, okay Yeah, this starts to look right, but there is like, you know, like what's this one? Why is it so short? And what's going on here? Like why did it has a hinge? Why is it was it hinged? So let's also just look at the active ones. That's about half and then So mounting type is really easy to Review because again, there's through hole and then there's service mountain. There's dash I don't want to show you the through hole because I thought this was like super cool I was like, well, so why would there be a through hole? So this is a through hole vertical style and I don't know what it's good for but I'm sure somebody's watching is like That's really something I need. It's like a vertical stuff. It sticks straight up, right, which is cool. Like it's unusual You're not gonna see that most of the time what you're gonna see is Right angle flat against a PCB why because you have so much pressure Going against it that you need to have it flat and well soldered so that when people Like they do a bad job inserting it. They don't like wrench it off of the board You can see here the insertion method Push in pull out or push and push out. So you that's the thing I showed you There's also hinged which I don't have any examples here. I've never actually seen a hinged one But the hinge ones are cool. They're like SD card Sockets which I do have the SD cards. I can show you what it kind of looks like So maybe you'll go to the overhead real fast. I'll show you this is this is not an SD card to sim card But it's the same concept. So with the hinged like you you slip the card in and then you click it Why I think first off you don't have to have it in your card You don't have to have this on an edge of a PCB You can have it anywhere on the PCB because you open it up instead of having to like You know with these it has to be at the edge Otherwise you can't get the SD card in because you have to maneuver it has to be a flat Insertion but with the hinge you don't have that that said, you know in this case, we're not going to do hinge So I'm going to I'm going to not select those Although I'll say sometimes I see like hinged even though it's not hinged. Okay, so let's go back to the computer Sorry Okay, so I selected only the push pull and then you're like well What's this these are actually really cool, and I wanted to point them out even though I have not used them But I have seen these the first time I saw these was on the VS 1000 audio module and this SD card slot What's cool about it is it's like the SD card sticks out a lot Like it sticks out quite far past the PCB, but the connector is so slim and another thing That's nice about it is the connector is a little elevated And so you can actually put it like alongside a Chip like it doesn't it can be In it doesn't have to be at the edge It can be a little bit inset and then there can be like components where the SD card Would cover it if that makes sense because only the end of the SD card Gets inserted into the socket so I've seen this where it's like Weird angles like you need it to come in weird or there there's not enough space for the full SD card So like this overhangs So these overhang style, I don't know what they're called But I'm gonna call them overhang style or like mini style. I've never used them, but they're like super cool Okay, then there's that slim style. This is the you know what we saw on that that teensy but the style we want is actually You know like the like the ones I have on the feather they're very inexpensive So let's go for push push type Because that's what I use The rest of this is not like you know, there's there's You know board guide switch, whatever contact finishes none of these are really important to me I'm gonna select normally stocking and Then I sort by price and especially if you're looking at prices of like, you know 250 pieces or more This one actually have this one's a new one the men 2051 but this one like is basically what I use. This is kind of a generic Connector, so I would recommend this one I Will say that there is this very cute The second one on the list by price is this very cute hinged one, which I think if you're going for a hinge design I like this it has the lock, you know, it slides out like the same you plug in the micro SD and you slip it in and then For those ultra slim style this kind it's only pull pull or push pull So it depends, you know, if you need that some style, you're not going to get the spring One thing I will say to watch out for with these is You can use these for SPI or SDIO. It doesn't matter. They give you all the pins available This is a pretty generic type however The back pins there's these two back pins there's you can kind of barely see like right here they are a card detect and What happens is that? They're kind of it's kind of shown here this little pad here connects to a mechanical piece That when you insert and remove the card Makes a short to ground so you can use it to detect physically if there's something in the slot However, some have opposing polarities and some have like two pins that you have to connect or disconnect and some are normally open Normally closed I'm only letting you know because I've had the issue where it's like I found a connector and I was like Oh, this SD card is the exact same SD card slot. Yay. I have two options And I didn't realize that even though mechanically like it looked the same Um, one had the switch normally opened So when there's a card in it's open and one had it when the card is in it's closed And so like that like really confused customers and testing and I've actually sorted it out But like I didn't think to check for Whether the switch which way the switch worked and it's that's not standard even if the rest of the pins are standard Um, that said is a great part. I like the price. How can you how can you say no? It's You know 70 cents in quantity comes in real Um, it's a good deal lens in stock. So this is a good micro SD card holder and I recommend it All right, that's a great search. Yay