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July 16, 2009
about 9 years ago
I forsee a problem where you are using the barrel jack and the alligators short out and ruin your fun. Ether the alligator clip should have a longer sleeve (so it can be fully protected) or the alligator clip version should be a standalone cable...
Tutorial - Run SPOT Run
about 10 years ago
I think (but cannot be sure) that the GPS accuracy problem has more to do with the limited number of bytes that are reserved for position information in the satellite uplink payload than the GPS receiver on the SPOT itself. At least on 409 beacons, a few of the least significant bits on the lat/lon are sacrificed, giving only about a 150m accuracy window. Something similar is probably done with SPOT to give the ability to send more freeform user data in the payload, though I do not know the GlobalStar specifications for this.
I think someone broke out the NMEA serial data from the SPOT as well. If you could pick up the missing position bits from this datastream you could send them along with your message and reconstruct the more precise position on the receiving side, no extra GPS required, and no need to send an entire position in your user message...
Tutorial - Nest Teardown
about 10 years ago
My theory on why the IC's are bonded to the board -- if they intend to sell this for use in commercial, industrial, or medical environments it may be that the standards specify additional shielding and hardening that is often found in industrial control systems.
What reason would they have to do this to prevent reverse engineering? It's not exactly rocket science how this thing works; it's just presumably really really excellent execution that makes this thing work well. In either case, the build quality is absolutely superb. I wish more devices were built to this sort of standard.
about 12 years ago
For whatever it's worth, it may not be as cheap, but the TechSpray wick you sell is 100% made right here in the US. I live in Amarillo, TX and have walked through their wick production line. They have a long machine that braids it and draws it down. It's fluxed and put onto these huge spools with thousands of feet of wick on them. There is a lady who sits there and hand winds each of the small quantity spools. They even do their own labels.
As a hobbyist, at least sometimes I get to make a decision about where my parts and supplies are sourced or manufactured, so if that's important to anyone else, I wanted to point out the domestic alternative.
No public wish lists :(