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  1. #91
    Join Date
    23rd October 2015
    Location
    Canberra, Australia
    Posts
    94
    Quote Originally Posted by wighty44 View Post
    I could not agree more! As an electronics enthusiast and retired engineer, I find that Eggtimer products are miles above hodgepodge...
    Quote Originally Posted by OverTheTop View Post
    ... As an electronic engineer for 25 years (and senior technical officer before that) I see this Egg stuff as a very solid product. ...
    Sounds like my story and I couldn’t agree more either.

    John
    TRA #14574 L2

  2. #92
    Join Date
    26th November 2009
    Posts
    5,217
    I finished up on the GPS module last night and mounted on top of my black Aero case. My switches are off to the side so I have room on the top to put the module on. Mr. Simpleton used servo tape and it seems to be mounted securely.
    I just need to lay a bead of J & B to secure the GPS antenna.

    It seems to work and I can have GPS Rocket Locator running on my Nexus device or another live terminal app concurrently. One can have a live map with backup it they want. Kurt


  3. #93
    Join Date
    19th June 2015
    Location
    Dallas, OR
    Posts
    67
    Completed my LCD-GPS module today, and it works Huge thanks to Cris for a nice mod to the LCD....it's going to be sooooo nice to walk through the sage w/one hand free, now that I don't have to keep my smart-phone out.

    Love that EggTimer stuff...
    TRA #15744
    NAR #99564
    L2 Binder Excel/J340M 9/2015
    Total Impulse 2016: 3196N

  4. #94
    Join Date
    26th November 2009
    Posts
    5,217

  5. #95
    Join Date
    18th October 2016
    Posts
    597
    I finally used the new GPS module with my Eggfinder Rx LCD. It worked like a champ. The track update rate seems too slow (especially when I'm driving across the lakebed on the way to my rocket), but everything worked great with it. I even managed to get the coveted "*" number of satellites on my Eggfinder Mini.

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    TRA L2. I-class record: "Vanish 29" with an I224, 14,596ft, Mach 1.92. Video here.

  6. #96
    Join Date
    26th November 2009
    Posts
    5,217
    Quote Originally Posted by GrouchoDuke View Post
    I finally used the new GPS module with my Eggfinder Rx LCD. It worked like a champ. The track update rate seems too slow (especially when I'm driving across the lakebed on the way to my rocket), but everything worked great with it. I even managed to get the coveted "*" number of satellites on my Eggfinder Mini.

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    The base station updates occur once every 10 seconds and are fixed in the firmware. That is what you might have been seeing. For a walking recovery it's not noticeable but if one is in or on a vehicle a little delay could be noticed. Kurt

  7. #97
    Join Date
    18th October 2016
    Posts
    597
    Quote Originally Posted by ksaves2 View Post
    The base station updates occur once every 10 seconds and are fixed in the firmware. That is what you might have been seeing. For a walking recovery it's not noticeable but if one is in or on a vehicle a little delay could be noticed.
    Yup, I know. I think the time delay is too long for either walking or driving. It feels like an update about every 3 seconds would be much better - a weighted (perhaps Kalman) filtered ground track over the last 10 seconds should be plenty to get good headings in either movement case.
    TRA L2. I-class record: "Vanish 29" with an I224, 14,596ft, Mach 1.92. Video here.

  8. #98
    Join Date
    13th March 2010
    Location
    Bentonville, AR
    Posts
    750
    Quote Originally Posted by ksaves2 View Post
    The base station updates occur once every 10 seconds and are fixed in the firmware. That is what you might have been seeing. For a walking recovery it's not noticeable but if one is in or on a vehicle a little delay could be noticed. Kurt
    The first time couple of times I used my TRS with the base station the updates seemed that they were about every second. The last time I used it, they were much more infrequently. I will have to go back and see if they were 10 seconds apart (I had a video camera running).

    Here is an excerpt from the LCD user manual that would indicate one second (or so) intervals would be normal:

    "The final number on the top display is the number of elapsed seconds since the last fix. If
    you’re getting constant data, this is going to be a zero, and you will hear a nice beep every
    second or so. Once your rocket launches and you lose GPS lock under boost, the beeps will go
    away, and you’ll see the counter start incrementing. Typically, in 5-20 seconds depending on
    the speed of your rocket you’ll start hearing the beeps again, and the position will update.
    When that happens, the timer will reset to zero again."
    Dwayne Shmel
    TRA 13137 / NAR 88172
    Tulsa Rocketry
    K.L.O.U.D. Busters
    L3

  9. #99
    Join Date
    9th October 2013
    Location
    San Jose, CA
    Posts
    691
    The signal sent from the rocket (TRS or TX) is sent once a second. The GPS attached to the LCD is only processed once every 10 seconds. And you need to have moved 30' from the previous reading for it to have a bearing for you and the direction to the rocket. The distance value (D:, lower-left corner) is supposed to be updated every 10 seconds regardless of motion. So assuming that the LCD is moving and not the rocket you'll only get position/direction/distance updates every 10 seconds, and if you don't move enough only the distance is updated. If the LCD had lost contact with the rocket as you get closer and it re-acquires the rocket then you might obviously get another jump, though I suspect the LCD might only re-calculate the rocket direction/distance whenever it gets an update from the on-board GPS, not the once-a-second updates from the rocket.

    Will Ferry (Launches & Videos) NAR #96512 (L2) / TRA #15328 (L2) / LUNAR #2759
    L1: 9/2013 @ XPRS, GLR T-Bolt "Thunderbolt" (R.I.P.), H148R
    L2: 4/2016 @ TCC Helm, Binder Design Excel w/DD "dd2.xls", J315R
    Impulse flown (flights): 2013: 767Ns (2), 2014: 4298Ns (8), 2015: 7486Ns (16), 2016: 11693Ns (18), 2017: 11138Ns (16), 2018: 3879Ns (5)

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