User`s manual

- 5 -
Other Features
Can be programmed and armed remotely using an Eggfinder LCD receiver
Also programmable using USB-TTL data cable (not included) and standard VT100/ANSI text terminal
programs, compatible with virtually all computers (PC, Mac, Linux)
Firmware can be updated from a standard PC using the serial cable
Power: 4.5-30v. 2S 7.4V LiPo’s, 350 mAH minimum recommended.
Current draw: 70 mA average (200 mA at startup)
Weight about 25 grams, size approx. 3.9” x 1.2”; fits in BT-55 body tube or 38mm coupler.
Disclaimers, Legal Stuff, Etc.
The Eggtimer TRS is meant to be used for hobby and experimental rocketry purposes. Although
hobby rocketry has an admirable safety record, largely due to the efforts of the good people at
the National Association of Rocketry (NAR) and the Tripoli Rocketry Association (TRA),
rocketry can be dangerous if proper safety precautions are not observed. This is particularly true
with some of the advanced techniques like pyrotechnic parachute deployment. People can and
have been seriously injured by not following recognized and accepted safety practices. We
cannot be responsible for your actions.
We strongly recommend that if you are not a member of either the NAR or the TRA, you join
one of them, join a local rocketry club, and pick the brains of experienced members before you
try any kind of multiple deployment. The safety information included in these instructions is by
no means comprehensive or complete, and is no substitute for the supervision and advice of
experienced rocketeers, and most importantly, common sense.
Limited Warranty
Eggtimer Rocketry warrants that all of the parts on the packing list of the Eggtimer TRS kit have
been included, and that they are all in working condition. If you are missing something, contact
us immediately at [e-mail] and we will send you whatever it is that you
are missing. If you are missing something really egregious (like the PC board or the processor,
for example), we may ask you to return the entire kit unbuilt, we will send you a prepaid
shipping label for this purpose. We’d especially like to see the packing list so we can figure out
what went wrong so it doesn’t happen again…
If your Eggtimer TRS does not work properly after assembly, take a deep breath, get out the
magnifying glass and a good light, and see if you have inadvertently created a solder bridge
somewhere. Chances are pretty good that you have, or that you have installed a part incorrectly.
We are a very small company and we just don’t have the resources to repair your board, but we