Pm sent.
Always good to see you Chris-ROC 40 was great fun for me. I'm pretty sure Wayne and Sharon would give you superlative reviews as Sharon's wound up past the power lines after the drag race to 13k and she retrieved in good time thanks to your magic box!
Here's a shot of the completed project. That antenna was for testing purposes:
View attachment 247939
Kurt
Man that looks really nice! Cant wait to get the ones I'm assembling
If I was going to be doing a bunch of these, I'd try to come up with an SMT soldering jig. Google these three words and you'll get some pictures.
I didn't have a good smooth tweezers and very carefully used two toothpicks to manipulate the "grain of rice" parts. I don't recommend it to neophytes. Get the tiny tipped tweezers but I was used to building some SMT projects like this a long time ago. If one catches a raised pad on
the board with the component while manipulating it, "flick" and it's gone!. It took about 8 hours and I did it in a clear glass casserole pyrex dish with sides. Didn't lose anything but that's because I went very sloooooow with the tiny SMT stuff.
I will say it pays to be careful but when I thought I had a problem with the serial connection, (before I realized it took 30 to 45 seconds before the EF TRS can even recognize the USB device and that the green and white connecting wires are reverse as compared to the Egg Timer),
I re-hit the board with the 25 watt soldering pen at all the Atmel pins and the NOR gate. Also "cleaned up" some of the accessible pads.
ie. even if I didn't see a short on magnification. If there was a "little peak" in the solder, I tried to melt it down and make it "look better".
Turns out all that was unneeded as all I would had to have done was switch the the green and white wires of the USB cable and wait 30 to 45 seconds before the TRS can be read from the terminal program. So it shows that the stuff is resilent. Kurt
thanks I should be fine though. I assembled Derek's mini tracker together which was all small smt parts that are a 1/4 the size of these smt parts. It may still be smart time wise though to come up with a Jig. I will look into it.
https://www.rocketryforum.com/attachment.php?attachmentid=247063&d=1416508280
I just got done flashing the LCD Rx and tested the TRS. I hope to fly it next Saturday, can't wait :grin:
View attachment 252067
View attachment 252066
Nice collection!!! I don't feel so bad about the number of trackers I have now. Gotta wait for the weather to break so I can put mine to use. Kurt
Great pics Juan. Can you post pics of the finished wiring details when you finish? Thanks.
Nice setup. Looks like you had enough room you could have used a single battery of 850mah or more to power the unit and the pyro circuit. I sometimes look at the battery as nose weight. If one needs noseweight for W/B might as well add something that can do some "useful" work. Kurt
I'm using a 2S 1000 mah battery to power the computer side of the TRS.
GPS units are notorious for consuming battery life.
I ran the antenna out the bottom through the bulkhead.
I also packed foam on both sides of the mounting plate.
JD
I really like this design! I was thinking of ways of building a glue-less nosecone a la the sticky Jart thread for my 3" FG Adventurer 3, but didn't love the idea of threaded rod running up through the center. This is an elegant way around that, but I can't quite make out how the sled is attached to the pem nuts? I imagine there's a bulkhead plate, through which the two rods run, and engage the sled with batteries and switches?
Enter your email address to join: