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hello and welcome today’s video is about the daughterboard I came up with a spinoff from the landing gear video it basically costs a couple of bucks to build it I would suggest getting two of these guys in case you brick one you can always use one as an ISP to reprogram it or you can use it to program your APM or whatever here’s the specs you don’t have to get it from this seller just as long as it’s got the same specs you also need to get a barometer I got him from this guy here was five of them for nine bucks but he screwed up the price I think right now and it says nineteen dollars it should only say nine dollars so I would suggest just doing a basic search on it here’s one here for 279 also make sure it has a transistor or regulator on it this guy has it here what that does is basically you can input five volts into it and it’ll convert three volts for this guy here instead of being worried about trying to find a stable 3.3 volts the board does have it this guy here does have three volts and 5 volts but I would still suggest trying to get one with the regulator on it anyways other things you can get to are these cables here probably you’d want male or female and female on both ends but whatever they’re usually only 99 cents for a bunch of cables and I believe that it so I’m going to jump into the video it’s gonna be a pretty quick video I’ll show maybe symma the mod I did on there to say my x5c just to prove a point all right two different styles I’ll show you both of them so open up your board all right the first thing I suggest to do is download my firmware you’ll also need mission planner if you’re not used to mission planner I’ll show you a link where to get that from plug this guy in and next step I’ll show you how to load the firmware all right plug in your Nano this is the important part here is make sure it says 57600 and then find the comport it gets detected on so this would be comm 3 and now you’ll want to go to initial setup go to install firmware download my zip file and unzip it and load up the landing gear daughterboard whatever version it might be by the time you guys get to it that’s done just confirm go to terminal because the barometer is not attached you should get an air push connect and there’s the right error here error no barometer so the next step is gonna be soldering on the barometer all right once you have the firmware loaded up depending in which barometer you ended up getting they have to do that all right so here’s the pins here get this in the camera so the ones we’re gonna be after is a four a five five volts and ground and I’ll show you guys how to hook that up now you have different ways of doing it you can if you ordered all that wire I’d showed you at the beginning of the video this kind of stuff here you can just connect them like that with the headers you can solder the whole rails on both sides it’s really up to you which way you want to do it but for the barometer it also depends which way you’re gonna fly it or how you’re gonna mount this you’re gonna melt it upside down you might want to mount this guy this way but I’m gonna show you this way so basically on this board here you’ll have I can get into focus there you go so we’re after the SDA and SCL VCC and ground and we’re not going to use a 3.3 volts we’re going to introduce five volts into this because

it has the regulator on it so this is just my way of doing it again you can put the headers that came with it like that it’s up to you guys how you want to do it I’m just going to show you my way so I’m just gonna cut these and separate just two of them for a four a five no chef this is hot enough yet all right so that’s going to be for the barometer the way I’m going to do it here as you plug it into the SDA and the SEL now it’s going to hit the reset button that’s okay just have it rest on top of it and you can actually push this down to click the reset button that’s got a handy I guess that’s the way this guy would get started on for SD SCL and SDA you can also mount it upside down this way as well it’s up to you and then the other one it’s marked on the back so SDA SEL are there so this one has to be mounted this way that’s the way this guy would get started on do you like this guy here right don’t be so lazy and clip this guy in alright so now you can clip those if you want like I said it’s red above the reset button so you can still reset it by pushing this down so the VCC would get hooked up to the 5 volts right there so what you can do is slap a pin in there and I get another one – you thought the best things that cut these with show that one after in a second so I’m just gonna create solder this guy in and the ground

okay so that’s the positive and then we’ll want to run run one to ground all right so the next one is at the ground and I’m going to use it the ground off the ISP I’d be this guy right there we’re that’s big enough I want to go too far down with it all right as is you should now be able to plug this in and be able to detect the barometer all right so now we’re basically already done the things here is off your CX 20 or whatever for the VD in and the ground that’s most likely where you’re gonna want to plug it in so you might want to make two headers for that depends how you’re gonna want to do it so this will be foreground ground and you’re positive all right so the barometer 100% done and we got our volts in and our ground for our tests we’re just gonna be using USB but off your CX 20 or whatever kind of quadcopter you’re gonna be using all you need is 5 volts here and then the last pin here is going to be D 9 and D 9 is going to be for your servo all right so we’re pretty much done with this guy here last thing you’ll want to do is add some hot glue on this side it’s a hot glue on this side get a piece of foam Square and then add it on top of the barometer like that if it’s mounted inside the 620 should be good like I said you’ll want to get your 5 volts from either a Beck or something like that most likely you wouldn’t be using one of these but if you are the light can be plugged here there’s a 3 volt right here you want to add another header to it plug in the 5 for the positive there and in the ground will want to be plugged just for testing like this if you using USB power you can leave it like that and plug in USB and test it it might suck too much power and reset or Brown out the Nano if you have 2 of these motors you’re gonna want to why the lights and same with the more expensive landing gear just if you usually comes with an orange wire so just why those two together and then plug it in just to this one pin here and that’ll be the trigger to make the legs all to retract just make sure this board here and your legs are sharing the same ground because it needs it alright so now I’ll show you guys some software and that should be it for this part of it alright open up mission planner after you have the barometer wired up choose your comp or and make sure it’s at 57600 don’t push the connect button here go to terminal push connect so alright so the firmware I tried to make it as simple as possible for the menu the default is thousand and two thousand that’s pretty much good for all the servos that come with the landing gears

basically treats it as an on/off there is like no middle so even if you picked 1500 it’s not like your legs gonna stop halfway it’s either on or off type setup 60 is about 5 feet so you can’t change that the menus a little ugly so just type menu and then here’s the settings here that I’ll have so say if you want to change the altitude for the different height all you would have to do is type alt colon and then type the height you want and it’s in inches so we’ll say 80 inches so now I know wrote it to 6 feet now so if you want to change the servos will say because some of them say if you have like the little blue one I show in the video the settings for that would be 900 to 1500 you have to type it like that there’s no real error checking so then push enter so that’s good a couple of other things here I just put here for kicks is you can check out the typical stuff so if you want to see the temperature sensor just type T on Edna so I’ll show you the sent the temperature then T off if you want to see the altitude the current altitude keep in mind I’m using the baseline so from start up when you plug it in it’s actually minus 6 and then this would be the difference from that in real time so a 1/2 and then your pressure and pressure off so I tried my best to make it mission planner friendly so you don’t need any extra tools and I didn’t have to waste time making it gooey so that’s basically it for this I believe I want to show you yep you might have to reset the 902 to take the settings but most likely you to reset it anyways but to see the settings now if you push disconnect and reconnect I should bring up the new settings so now that doesn’t show the defaults are being used and now the server low is 900 server high is 1500 and they altitude trigger also I’ll probably touch on this a couple of times in it the midpoint yeah what I call midpoint glitching here I added an extra 40 inches so say if you set it to 80 it might not actually trigger until plus 40 so an extra 3 feet will say the reason why it does is because once it goes past the 80 if you’re floating red at 80 the barometer will get confusing my software gets confused obviously and it’s gonna keep want to extend the landing gear and retract them so I thought it would be best just to add a pad of 40 I might make that user changeable eventually but basically it’s a 43 feet play because if you notice here there’s actually quite a bit of error so it’s going from okay off so it just stops doing it so I will see if we have any minuses here but basically 30 and I’ve seen it a bit even as high as 50 sometimes so that’s the error ratio of the barometer or I’ll just show you with this little mortar here most likely you wouldn’t be using a little mortar like this anyways but who knows what your projects gonna be maybe you’ll want to have an antenna stick straight up in the air something weird okay so we’re gonna be using the three volts here most likely you’d want to use a power brick or something like that because it might Brown out the Nano it won’t mess it up it just might reset it so this guy here I’ll just move it down here like this what should happen with my software should I automatically go back up or down whichever way it is I’m not sure it now so all I should have to do is plug this guy in there you go so that it automatically put the legs back down just in case they were up and yeah so to see I can push that again move it up and it goes right back down and it’s good to go so right now if I go up about six feet it should retract so what you can do before you put it into your quadcopter you can just like walk up and down some stairs just to make sure it’s working but it should all right so I got my x5c here I

actually did manage to add the stuff inside it’s a little too heavy I’ll show a very small video of this guy working I’ll just show you how I mounted it in this guy so basically what I did here was it’s directly on two servos I would really strongly suggest probably not doing that plus these little guys here I ordered about eight of them and I think five of them came dead so they break really really easy but anyways the mounting inside this guy gets I’ll show you the mess so basically I was impatient I didn’t want to order another three volt 5 to 5 volt step up so I tried using one of these USB guys and trust me it’s just a pain in the ass it just doesn’t work too good but basically it fits well in here what I ended up doing here for the two servos was I just ran a really small battery one of those small little batteries and that guy fits in right there so yeah I’ll show a quick video of this guy flying it was totally pointless because these guys don’t come with Gimbels anyways it’s more just for looks I guess to have it go up like this but it’s really not worth it because the trade-off is the limit time limit in the air because of the extra weight so I think at total it’s only an extra 20 grams or so but it could also be my batteries are pretty much toast they’re all swelled up and stuff like that so it could very well be that but anyways hopefully my little daughter board hope helps out somebody there’s a fun little project and that’s it guys I’ll just end it with the video of the semi flying and that’s it guys thanks for watching bye

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