http://www.pegasushabproject.org.uk/wiki/ 2012-02-04T13:37:34+00:00 http://www.pegasushabproject.org.uk/wiki/ http://www.pegasushabproject.org.uk/wiki/lib/images/favicon.ico text/html 2011-11-12T15:12:24+00:00 James Coxon http://www.pegasushabproject.org.uk/wiki/doku.php/start?rev=1321110744&do=diff Updates * Atlas3 - 11/11/11 - launched, floated for 30minutes at 36-37km, burst and dumped over North Sea, payload worked excellently * Constructing the Atlas flight computer for a second floater launch May 2011 * Atlas launch 13/11/10 - Summary: great launch, gps fail, didn't float, crystal oven worked well, dumped into North Sea. * Currently working on BallastHalo 6 - just finished designing the new flight computer and am currently doing some testing on maintaining the radio crystal… text/html 2011-11-12T15:08:36+00:00 James Coxon http://www.pegasushabproject.org.uk/wiki/doku.php/missions:atlas:atlas3?rev=1321110516&do=diff Aim * To explore the phenomena of 36km floats with Howyee balloons * To test the Atlas flight computer at altitude Components * Atlas PCB * ATmega328 + 8Mhz Crystal * Radiometrix NTX2 10mW 434.075Mhz + Crystal oven * GPSbee (Ublox 5) GPS * 3 x DS18b20 * Photosensor text/html 2011-06-30T06:53:32+00:00 James Coxon http://www.pegasushabproject.org.uk/wiki/doku.php/private:drop:nereus1?rev=1309416812&do=diff Jobs * fix arduino to read voltage * possible to put photodiode onto charge light, able to know if charging * external photodiode ?day/night * add GM862 * AT commands to receive sms, read - allows to be programable * temperature sensor * avoid low power reset loops though will need breakout counter * webpage * occasionally power cycle of gsm goes out of sync - need to check is powered on * need better data * switch to sms2email * stripboard text/html 2011-06-15T07:04:10+00:00 James Coxon http://www.pegasushabproject.org.uk/wiki/doku.php/private:start?rev=1308121450&do=diff Mythology * Nereus on Wikipedia Mission Objective * Long duration boat - at sea for up to 1 month... (simple hull with keel and flat surface for solar panels). * Maintain approximate position over a period of time * Move to waypoints * Transmit data back and receive commands * Make it go somewhere one day... * Long duration text/html 2011-05-09T13:02:30+00:00 James Coxon http://www.pegasushabproject.org.uk/wiki/doku.php/missions:atlas:atlas2?rev=1304946150&do=diff Aim * Fix upon previous flight issues especially to get a reliable working GPS system * Test out a long duration floater * Improve ability to get the balloon to float * Explore methods of recruiting listeners. Components * Atlas flight computer * ATmega328 * Radiometrix NTX2 434.075Mhz 10mW * Crystal oven - set point 10degC