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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/CBSU33MREDBJKHK7AL7Y7ER65NUV33RM/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "CAJUhCTN3oxcyjj1Sm2Go5EoHmcWU_S=T5-Ob4x_+JTVyqhOyxA@mail.gmail.com",
    "message_id_hash": "CBSU33MREDBJKHK7AL7Y7ER65NUV33RM",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/FPQ3IOK7YULKQEKW67HZNRPRRJI64S2V/",
    "sender": {
        "address": "normanlizeth (a) gmail.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Lizeth Norman",
    "subject": "[amsat-bb] Re: inquiry about homebrew az-el systems",
    "date": "2013-02-24T03:41:52Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/YEO43V5RVMTOUK2XC4U7PUMNSLELQWMG/",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/NW53CE4FTP3WRU4B5EEKPCK5Z77WD45S/",
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/WEDIA6IS5PW4AGA5FY3M54CZGWTRJW4Z/"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Samudra,\nThis is a good question for a first year engineering student like\nmyself: How does one bring home the best bang for the buck out of an\nengineering dollar?\n\nFeel free to ask around. A few on the list have driven unusual devices\nto get antennas moved.\n\nHow does a project get into the hands of people who will actually do\nit? A one off I can do for you in my basement. Probably with parts\nfrom radio shack, a grinder and a few hand tools.. A reproducible\nproject 10 years from now? Hardly likely.\n\nI submit to you that irrespective of the metalwork this is a simple\nproject as you propose, however it must be reproducible. With a\nstudent copy of SolidWorks, a circular saw, drill and the Arduino IDE\nit could be prototyped by two people in a weekend. Refining it so that\na relatively new ham with a smidgin of technical ability could do it\nmight take a little longer. These days with the internet and cad, the\nreal issue is the tooling. How do you design/layout such that it can\nbe done with snips/file/saw/fill in the blunt instrument here..\n73 es have fun..\n\nNorm n3ykf\n\n\n\n\n\nOn Sat, Feb 23, 2013 at 10:19 PM, Samudra Haque <[email protected]> wrote:\n> I hope it is evident, I am not focusing on the\n> controller/microcontroller/computer interface/az-el controller/etc. The real\n> issue is how cheaply can an antenna be mounted on a kingpost somewhere on a\n> surface, with a view towards the sky, and how conveniently can that mount be\n> motorized, with a sensor to give feedback to the ground station.\n> electronics, seem to be, (apologises to EE friends) a dime a dozen, cheaper\n> if made in hundreds, but the key drawback of any design is the mechanical\n> and electromechanical (can we use, mechatronics) system that serves as the\n> actuators. I am not referring to a hand held antenna assembly, but rather\n> something that we can all use in cold/hot weather and that can be put\n> together by one / two persons on an average post.\n>\n> Comments welcome, I think the future holds bright for amsats and edu based\n> cubesats.\n>\n>\n> -samudra\n>\n>\n> On Sat, Feb 23, 2013 at 9:50 PM, Lizeth Norman <[email protected]>\n> wrote:\n>>\n>> Gus and the group:\n>> Lots of birds going up in the next year. Success rate not 100% as it's\n>> rocket science oftentimes on a budget. Hopefully we'll get a few out\n>> of it.\n>> The Arduino IDE install supports PPM. The nice thing about that\n>> platform is that configuration is doable for just about all forms of\n>> hardware that you might drive with it and scaling can be done in\n>> software for the various different bits of kit.\n>>\n>> I am sure that with the appropriate development environment and having\n>> the hardware on hand IN a well equipped lab, it should be a weekend\n>> project to get running.\n>>\n>> The hard bit in my opinion is how to mount the antennas to the az/el\n>> clockwork. Will require a little woodwork/metalwork to finish.\n>>\n>> Everyone who does this will have a problem with some phase of it.\n>> Needs to be simple and repeatable.\n>>\n>> Norm n3ykf\n>> _______________________________________________\n>> Sent via [email protected]. Opinions expressed are those of the author.\n>> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>\n>\n",
    "attachments": []
}