[Space] the APRS gear hath arrived

Mikolaj Habryn dichro at rcpt.to
Fri Feb 5 06:12:46 UTC 2010

Sadly, it looks like the SD400 I bought off ebay has too recent a
firmware version to be compatible with CHDK. I'm trying to find a way
to downgrade firmware but getting no joy - Canon won't let me download
their software without a valid serial number, and the one on this
camera is faded into illegibility.

In short, we get no time lapse photographs with this, although we can
start it recording video as we launch.


On Thu, Feb 4, 2010 at 5:20 PM, Mikolaj Habryn <dichro at rcpt.to> wrote:
> (also arrived: two more balloons, to be sure, to be sure)
> On Thu, Feb 4, 2010 at 4:17 PM, Mikolaj Habryn <dichro at rcpt.to> wrote:
>> I'll bring it by Noisebridge around 8.30 tonight. We have a pair of 5W
>> transceivers (ham license required to operate, so easy on the trigger
>> fingers :), a pair of APRS trackers, and a Garmin GPS.
>> Things to do:
>> * solder up the opentracker kits
>> * solder cables to connect tracker to radio
>> * upgrade firmware on Garmin GPS, make sure it's in aviation mode (and
>> whatever else it says to do on the argentdata product page for it)
>> * connect one of the radios to a laptop
>> * power tracker off lab power supply
>> * bench test - measure tracker current draw, confirm we get position
>> data end to end
>> * hook up antenna that Christie bought
>> * work out battery supplies for tracker (has an on-board regulator, supposedly)
>> * distance test (across the bay?) - probably for Saturday
>> I also have an SD card for the camera that's in the balloon box and
>> will bring my universal lithium charger. The pressure sensors are in
>> the box as well, and have a 6 pin SIP connector that ought be simple
>> to connect up to the opentracker, and the final bonus points shall be
>> awarded to whomever builds a trivial voltage divider that will let us
>> monitor voltage and current draw from the battery pack via the
>> tracker.
>> m.

More information about the Space mailing list