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the next connector were going to do is the db9 9 pin okay were going to do the male connector on this one and Ive already opened the package and you can see theres a number of pieces here some pieces for the back for strain release and were going to use the smaller cable here just a twisted pair with shield so were going to use the the smaller strain relief of the bunch and the way this is going to go together this actually fits in a little slot here in the back the connector is going to slot in up here at the front were going to put the top part of this on and then were going to use some of the machine screws nuts to hold the whole assembly together is how thats going to work okay so lets go ahead and begin by preparing our cable like the rest of the cables we do we want to make sure that we have things like our strain relief goes on and also want to make sure that our heat shrink is on so were going to make sure all of that is on before we start and then since this is a you know half shell arrangement we can put this on after we do our solder work here so were going to take a look at our connector and its like okay what pins are what and theyre very difficult to see but if you look closely youll find that the top left here is actually pin 1 and then you go 2 3 4 5 and then the bottom rows 7 8 Im sorry 6 7 8 9 so when were doing something like rs-232 were typically soldering or crimping or connecting two pins 2 3 and 5 so here its going to be pin 1 so were going to be do pin 2 and thats going to be transmitted and
3 is going to be received and pin 5 is going to be the common shield connection so as I go to flip this over and one is now here and 10 five is here so I know my shield connection is going to go there so 2 is going to be there thats going to be my transmit and you can see the way the solder cups are if I were doing pin 7 8 for CTS RTS those would go here on the bottom but Im only doing 2 3 & 5 so were going to work on the connectors here at the top all right so lets go ahead and begin to finish preparing our cable here weve got a good bit of room to work with with the connector lets go ahead and begin by removing the jacket you take the jacket off you see some of the little orange nylon that were going to remove here were going to find our drain wire twist those strands together and were going to find also our foil shield okay so we take a look at this connector remember thats pin 1 so pin 5 is going to be over here so thats going to be your shield connection for 5 and then 2 and 3 for our transmit and receive so all of this is going to fit inside this connector and I can even trim a little bit of this back I dont want to trim this one back too far because I dont want to put any strain actually on the solder connections themselves so 5 is going to be over here and then we have 2 & 3 so this is how its going to go together and these solder cups are not very deep by the way so were not going to have to trim too much off lets go ahead and again removing some of the outer jacket here and
again we can test fit here pintu and see how far it goes into the solder cup which is about right and then pin three and then well do pin five so lets go ahead and finish preparing our wire here were just going to lightly Tim the conductors themselves make sure our iron is clean and were going to tin our iron here lightly tin our wires bring the soldering iron to the backside of the wire applying the solder to the wire itself now our cable is ready lets go ahead and prepare our connector were going to be working on the top row here we have five two and three that were going to be working with lets go ahead and add a little hotter to these cups make sure air is clean pretty tin it these cops are very small so its changed to a smaller tip to make it easier so were going to go ahead and apply heat to the cup and put solder in the cops here and making sure the iron is 10 is going to help our heat transfer make sure its clean the brown stuff that you see there are actually the impurities that the flux is cleaning up for us okay so weve prepared our connector and were going to do two three and five make sure our iron is clean and that were pretty tuned and we can do pin two and let it cool and Im going to preposition this slightly so it goes into the copies here and just trying to make sure the tip is clean and then its pretend oops and were getting a little hot no is this some tip smaller it also runs at a hotter temperature so I cant be on here too long so let it cool and now Im going to go ahead and put some heat-shrink on the shield get some of our small heat shrink
here Wow trim it back song and then we can go ahead and put this into the cow take our iron out make sure its pretend and then we can come around and connect our shield and let it cool down Ive got a little bit of a whisker there it just doesnt want to go away today okay so weve got pins 2 3 & 5 when I go ahead and bring my heat-shrink up what Im going to do with my heat shrink is Im going to shrink down the part on the shield first and then Im going to bring this heat shrink up and make sure it covers the transition point here so lets go ahead and bring over our heat gun we can bring up our rubber grommet which is slid way down the cable here theres our rubber grommet and we can go ahead and begin to put the shell together and this will vary a little bit depending on manufacturer thats how that goes together you can see theres already nut there from earlier so we can put in one of the machine screws one side and the way the nut fits in there it actually keeps it from turning yes we finish this up okay and thats our db9 nail and now well move on to the db9 female Ive already opened up the parts package here and you can see all the parts to it at the back here attached to the little rubber strip you see the strain reliefs for it you can see the various sizes were going to be doing some small cable here so were going to use the smallest and the strainer leaves and the way this is going to go together you can see our half shells here and this is going to fit in the back and then the connector is going to go on slot there and then were going to
side of the shell on it and then were going to use some machine screws nuts to hold the assembly together okay so we prepare our cable lets go ahead and prepare our connector so this is the front of our db9 and its a little hard to read but you would find the pins labeled here on the front 1 2 3 4 5 and the bottom row 6 7 8 9 so were going to turn this over and were going to find that pin 1 is now over here on the left so 1 2 3 4 5 and on the other connector that we did pin 3 was transmitted so were going to put that to the receive here so that was the read so now were going to put that to pin 3 so what were looking at is black red and a common shield so again black red and common shoot lets go ahead and prepare our connector here now that weve prepared our connector lets go ahead and put our conductors in now we can apply our heat-shrink lets go ahead and finish up our assembly our little rubber grommet slid almost all the way down to the other end of the cable so lets go ahead and bring that back heres one half of our shell assembly put the rubber grommet in the slot well put on the other side we can slot on the nuts in insert the machine screw the other side thats our first one go ahead and do the other one all right putting our nut down the backside again Im putting machine screw in this side yeah we can tighten it down okay and thats our db9 female weve completed our db9 female and now we have a db9 male to db9 female such as we would use for rs-232 communications like any other cable assembly we make well test it and were good to go
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