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  1. #1
    Join Date
    26th August 2012
    Location
    Somewhere in the Bay Area
    Posts
    138

    Pnut altimeter - barometer sensorlocation?

    Gentledudes and dudettes,

    I'm working with a TARC team that will be flying the Pnut altimeter. It will live in a carrier made of a section of carved out pool noodle. I want to make sure that the sensor is positioned so that it is not obstructed by the pool noodle foam, and I'm not sure where the sensor is on the board.

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    Pics of both sides of the board are above (front the PerfectFlite web site). My guess is that it is that the sensor is that tiny gold pad on the bottom side of the board, upper left edge just to the right of the mounting hole. But just a guess.

    For the next launch I will suggest that they mount the altimeter on a small board, so that stand-offs keep the sensor in clear air and away from the pool noodle cavity walls. But no time for that tonight, they are working on getting their rockets finished for a launch tomorrow.

    Any ideas? Thanks in advance!

    Dad is sad.
    Very, very sad.
    He had a bad day.
    What a day Dad had!

    _______________________________________________
    NAR 92379/TRA 17422/L3
    LUNAR

  2. #2
    Join Date
    9th October 2013
    Location
    San Jose, CA
    Posts
    659
    In all likelihood it will be a small metal part with a hole on the top metal. That image isn't high-enough quality to say for certain, but I do think that may be the part lurking behind the left-most black IC in the bottom-side picture (left of the "P" in PerfectFlite).

    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)

  3. #3
    Join Date
    14th March 2009
    Location
    Ohio
    Posts
    3,239
    Your must be newer than mine, but I think the barometer is one of the small chips. What I always assumed was the barometer on mine has 4 legs into the circuit board and two holes in the top of it. Edit: Look for a chip with a holes or holes in it.
    Zeus-cat
    NAR# 92125 L1
    Total Impulse for 2017: 1,493.8 N/s Flights: 56
    2017: 1/2A:0, A:6, B:11, C:2, D:12, E:4, F:1, G: I have NEVER launched a G motor, H:1, I:1

  4. #4
    Join Date
    19th June 2014
    Posts
    36
    Pretty sure the Pnut uses the MS5607 Baro sensor so it will look like one of those. It looks like there is a piece of tape or something hiding the chip, you can see a tiny little hole in a silver thing by the P in perfect flight, thats the pressure port of the sensor
    -Stephen A.

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