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  1. #31
    Join Date
    26th November 2009
    Posts
    4,939
    I echo the response above. I'm just a script kiddie and wouldn't be able to experiment without learning for the experiences and posts of others.
    It takes a fair amount of humility to post one's endeavor's leaving one open to "public baths" as A. Lincoln used to call his public audiences.

    I have no scruples copying somebody else's methods especially if they are a heck of a lot better than what I intended to do. I try to give credit if anyone see's
    what I've done and like it too. If I don't remember the name I at least state it wasn't my idea.

    Best advice a prefect ever gave me me (along the lines of the advice given Benjamin Braddock in the Graduate, "Plastics".)
    was "Press fit when you can." Kurt


  2. #32
    Join Date
    13th December 2011
    Location
    Edmonton,Alberta
    Posts
    295
    double posted pics grr


  3. #33
    Join Date
    13th December 2011
    Location
    Edmonton,Alberta
    Posts
    295
    I finished soldering the GPS add-on, updated the software on the LCD Receiver, and installed them in the 3D printed case I designed and printed to hold both parts along with the Bluetooth module.

    Now I just have to go outside and play with the new GPS add-on before flying.

    Sent from my iPhone using Rocketry Forum
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  4. #34
    Join Date
    19th June 2017
    Location
    Vacaville, CA
    Posts
    261
    I flew my EF mini to 5445' on Saturday. Never lost contact with the rocket. The GPS-LCD module aloud me to walk right to it. Even though visual was reacquired around a thousand feet. And it landed 890 ft from me as per my LCD. But it worked perfectly as intended. I did still have my smartphone running GPS rocket locator. But it was not necessary

    Sent from my VS988 using Tapatalk
    Eric Hamilton, NAR, TRA
    SARG, LUNAR
    Level 1, April 2017, Estes Argent, H115DM
    Level 2, September 2017, Scratchbuilt 2.6", J270G

  5. #35
    Join Date
    19th June 2017
    Location
    Vacaville, CA
    Posts
    261
    I finished rebuilding my LCD box. I can now fly and track my two stage rocket, with just one box.

    I mounted two LCD units with one LCD-GPS module feeding both displays. Currently have a BT module hooked up to the top display. But I'm going split the TX and RX with a DPDT switch so either unit can use it.

    Right now I have a 1000 mAh 2s lipo running everything. A bigger 2200 mAh is currently on its way and will attach to the case back.

    Everything seams to work. But numbers seamed kind of off while just stationary testing. Click image for larger version. 

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    Sent from my VS988 using Tapatalk
    Eric Hamilton, NAR, TRA
    SARG, LUNAR
    Level 1, April 2017, Estes Argent, H115DM
    Level 2, September 2017, Scratchbuilt 2.6", J270G

  6. #36
    Join Date
    26th November 2009
    Posts
    4,939
    Dastardly build! Looks great. You got your power switches set up so you can use one or the other or both? Kurt

  7. #37
    Join Date
    10th July 2007
    Location
    Melbourne, Australia
    Posts
    1,267
    Just a reminder to everyone using these. Don't point the antennas in the direction of the rocket. Best reception is with the signal side-on to the sticks. I have seen many people at launches getting this wrong. It won't help with your tracking
    TRA 13430, Level 3

    "Everybody's simulation model is guilty until proven innocent" (Thomas H. Lawrence 1994)

  8. #38
    Join Date
    19th June 2017
    Location
    Vacaville, CA
    Posts
    261
    Quote Originally Posted by ksaves2 View Post
    Dastardly build! Looks great. You got your power switches set up so you can use one or the other or both? Kurt
    Currently, one switch is power for both and the other switch is for back light for both. They each have their own push button. I believe I can run all day on One battery charge with the current setup.

    Sent from my VS988 using Tapatalk
    Eric Hamilton, NAR, TRA
    SARG, LUNAR
    Level 1, April 2017, Estes Argent, H115DM
    Level 2, September 2017, Scratchbuilt 2.6", J270G

  9. #39
    Join Date
    26th November 2009
    Posts
    4,939
    Yessir, that's correct! Fight that urge, fight that urge, fight that urge! Unless using a Yagi on 70cm (400Mhz), 1.25meters (215Mhz), or 2 meter band (144Mhz). Technically the beamwidth of a Yagi on 33cm (900Mhz ISM) is pretty narrow and might be
    hard to keep properly pointed at a rocket in flight. Exception is for ground recovery I've found on three tests that a Yagi on 900Mhz most definitely increases the ground footprint of the tracker. The rocket is generally stationary or if blowing across the ground
    from the wind it's easy to keep the Yagi pointed at it. For sport flying where the rocket is relatively close, the Yagi will tell you a bit "sooner" you will find it as opposed to reacquiring the signal a little later.
    The 900Mhz Yagi might prove it's worth for a project that lands a far distance away where the last known position and the final landing point is out of the ground footprint of a vertical antenna on the receiver. For most of us including myself
    this is not necessary 90% of the time. Kurt


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