[NRVR-Members] EggTimer Sale and NRVR Build Session

Mon Nov 26 10:26:02 CST 2018

I've ordered the basic Tx and "dongle" Rx (no LCD for now).

On Mon, Nov 26, 2018 at 12:43 AM Thomas Tweeks Weeks <tom at theweeks.org>
wrote:

> *Q: How many of you are thinking about getting some form of the Eggfinder
> GPS transmitter? *
>
>
>
>
>
> I have android.. but am still going with Jordan's 2b option (full wireless
> GPS data back to my own GPS-LCD for bearing & distance arrow pointing to
> where my rocket landed..)
>
> No muss.. no fuss..
>
>
>
> One note.. The creator Cris said you'll also get much better reception on
> the LCD receiver with the extra high gain external antenna.. (which I opted
> for).
>
>
>
> I'm also using the full "Eggtimer TRS GPS/Flight Computer" ($70) which is
> a great deal (full flight computer, wireless programming,
> continuity/voltage status, arming, remote deployment testing + GPS on the
> rocket.. all for $70).
>
>
>
> I love hardware hacking.. This is going to be a fun little project...
> Thanks for the nudge Jordan! :)
>
>
>
> Tweeks
>
> p.s. Bob asked about the club getting a GPS/LCD Receiver.. I can't
> see justifying this if only a couple of us have a GPS xmitters in our
> rockets.. but if more than that end up doing this.. say like 4-6 of us or
> more.. then I think that might be a nice "club service" we offer our
> flyers. Thoughts?
>
>
>
>
>
> On Sunday, November 25, 2018 10:01pm, "Jordan Truesdell" <
> jordan at truesdell.org> said:
>
> I just wrote this up for an iPhone user. I meant to forward it to the
> group but...email is hard.
>
> The question was "what do I need to get this data onto my iPhone"
>
> *tl;dr*.
> (1) All the GPS transmitters work with all the receivers he sells.
> (2) Apple and generic GPS data don't mix.
> *      A * buy LCD receiver and manually type the coordinates into Maps,
>       *B * get Android, or
>       *C  *buy the "extra" GPS RX module and forget the phones
> altogether.
>
> *Long version. (sit down, grab a beer)*
> Bluetooth GPS and iPhones don't play nice. More specifically, Apple
> doesn't support external serial data over bluetooth, so even if you find a
> module that will say the magic Apple words, there are no apps which can
> take that data and put it on a map. If you want a snazzy GPS+iPhone app,
> you'll have to spend $350 on a Featherweight GPS tracker. Or go find a $10
> Android phone and dedicate it to rocket tracking. Kroger has LG tracphones
> on sale every few months.
>
> On to the product dump. BTW - I made this myself, so it's probably
> slightly wrong. But I think it's mostly right.
>
> There is one altimeter which includes GPS, which is the *Eggtimer TRS
> GPS/Flight Computer *($70). The whole line goes like this:
>
> *GPS ONLY*
> Mini - GPS transmitter that fits in a 24mm body tube
> TX GPS transmitter that fits in a 38mm body tube
>
> *GPS + Altimeter*
> TRS - a flight computer / altimeter which also has a GPS transmitter on it
>
> *Altimeter Only*
> Quark - 2 outputs at apogee and 500', barometric only, peak altitude beeps
> out at landing
> Classic - flight altimeter that's easy to assembly (no surface mount); 2
> channels, flight data recorder, USB interface with PC
> Quantum - Classic, but with surface mount components and wifi programming
> (and possibly arming..I'm not sure)
> Proton - flight altimeter with 6 channels, 120G accelerometer, wifi
> programming/arming
> It doesn't matter which GPS you get, they all work with all of the GPS
> receivers.
>   ***The GPS Receivers aren't used for setting the altimeter, they just
> receive data from the GPS***
> The receiver for the GPS module breaks down into two options, each with a
> sub-variant, and these all get data from all of the GPS transmitters
>
> (1a) Wireless receiver board + USB cable - you plug it into your PC and it
> sends GPS data to you just like you had a 1000' long serial cable plugged
> into your rocket
> (1b) Wireless Receiver board + bluetooth module - you virtually plug the
> BT into your Android phone or PC and it sends GPS data to you just like
> you had a 1000' long serial cable plugged into your rocket
>
>           You can upgrade from 1a to 1b at any time with a $7 HC06
> Bluetooth board off Amazon and a 4 pin standard jumper cable.
>
> (2a) LCD display and small microprocessor with a wireless module all on
> one board. It displays the current GPS coordinates of your rocket, which
> you can type into your iPhone Maps application
> (2b)  LCD display and small microprocessor with a wireless module PLUS
> another GPS receiver module that plugs into it.  It displays the current
> GPS coordinates of your rocket, distance to your rocket, and an arrow
> pointing towards your rocket. No other device is required.
>
>          You can upgrade from 2a to 2b at any time with the $40 GPS ($34
> on sale) module from EggTimer
>          You can put a USB cable or a bluetooth module on the LCD version
> - it has the pin header for it - and get both the LCD readout and the link
> to your PC or Android phone at the same time.
>          You CANNOT upgrade from 1 to 2. You buy a new one and you now
> have a backup receiver. Or use a second receiver for staged flights with
> two transmitters (because we haven't spent enough money already, amirite?)
>
>
> --
> Jordan
>
> On 11/25/2018 7:16:46 PM, Jordan Truesdell <jordan at truesdell.org> wrote:
> Hey everybody,
>
> Egg Timer Rocketry is having a sale. It happens once a year and you can
> get their rocketry electronics (altimeters, wifi switches, deployment
> computers, GPS trackers etc.) for $5-20 off. The gear is generally very
> affordable, from $15 for a dual deployment altimeter to $70 for the
> cheapest GPS receiver/transmitter kit. The catch is that you have to
> *build* the electronics from a kit. You get a bag o' parts - everything
> you need from pcbs to solder to heat shrink - and a link to an assembly PDF
> with detailed instructions. You supply the soldering iron, some tape, and
> your time.  The simple kits take less than an hour to build, the more
> complex ones can take two hours.
>
> As challenging as they are to build alone, I think they'd be fun - and a
> lot less stressful - to build as a group. They're not difficult, per se,
> but there are some tricks to working with the small parts and assembly
> techniques. To that end, if anyone wants to try out a build-you-own
> avionics I'm going to host a build party for the Eggfinder(/timer) kits in
> mid-January. I'm thinking around the last week of January would be best.
> If you get a kit, ping me off-list (jordan at truesdell.org). Presuming we
> have interest we'll set up a date and converge on a convenient location
> with soldering irons, magnifying glasses, and spare hands to put them all
> together and test them.
> --
> Jordan
>
> On 11/25/2018 6:18:56 PM, Thomas Tweeks Weeks <tom at theweeks.org> wrote:
>
> Got the links reversed.. :)
>
>
>
> If you're not on fbook.. the sale info is here:
>
> http://eggtimerrocketry.com/eggtimer-rocketry-holiday-sale/
> <http://eggtimerrocketry.com/eggtimer-rocketry-holiday-sale/?fbclid=IwAR1CFBoxIUR5y--AxIHzOtsGrwtJoHNmB6ndxotdjdvxnA3u53GJ8X63eeI>
>
>
>
> Cris (the owner) only does purchases via email + paypal.. So jump in now
> if you're thinking about doing so.
>
>
>
> Stay tuned for a Q1 date or Jordan to post follow up details here.
>
>
>
> Anything else Jordan?
>
>
>
> Tweeks
>
>
>
> On Sunday, November 25, 2018 5:03pm, "Thomas Tweeks Weeks" <
> tom at theweeks.org> said:
>
> Hey all..
>
>
>
> Jordan posted something on our fbook group about doing a group build of
> EggTimer trackers and flight computers:
>
> http://eggtimerrocketry.com/eggtimer-rocketry-holiday-sale/
> <http://eggtimerrocketry.com/eggtimer-rocketry-holiday-sale/?fbclid=IwAR1CFBoxIUR5y--AxIHzOtsGrwtJoHNmB6ndxotdjdvxnA3u53GJ8X63eeI>
>
>
>
> If you're not on fbook, see here:
>
> https://www.facebook.com/groups/NRV.Rocketry/permalink/2464862803540486/
>
>
>
>
>
> Maybe Jordan can follow up on specifics (dates, etc) here and I can book
> us a room (probably some time in Jan/Feb).
>
>
>
> Tweeks
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>
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-- 

*Quidquid latine dictum sit, altum viditur.*
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