This will be a High Altitude Balloon project build. Basically the plan is to launch a helium filled latex weather balloon to approximately 100,000 feet carrying a payload of cameras, experiments and data logging equipment. This will put it in the realm of near-space/stratosphere.
I will post the construction videos/tutorials/source files & Arduino code as we progress through the build. All 3D printed parts will be completed on my Solidoodle 2 3D printer and should be easily replicated by others. Ideally we will complete the High Altitude Balloon (HAB) prior to April 18th 2014.
That weekend Stanford University has organized the Global Space Balloon Challenge (as well this is the best time for my area to recover the payload).
The basics will consist of:
A weather Balloon
HAB Payload enclosure
2 GPS trackers for recovery (an Android phone and a Spot Trace unit)
HD Video (hopefully I can find a suitable one)
Cannon Camera with CHDK for still images
Barometric Pressure Logging
Temperature Logging (inside and outside the payload)
Other sensors/electronics to be determined...
If you have any items, skills, or funds you wish to donate to the project please feel free to contact me. Would love to have you on the team.
Check out the build, launch and tracking at www.mkme.org
Instructions will be via the build videos and respective source files added. Multiple 3D printed parts will be required for electronics cases, camera brackets etc.
Adding RTC support
RTC Connected to VCC and Ground
RTC SDA connected to pin Analog 4
RTC SCL connected to pin Analog 5
Used I2CScanner.ino to find I2C addresses- 0x50 (EEPROM?) and 0x68 found
Used SetRTC.ino to manually set proper date/date on RTC module- This wil set the date/time as soon as serial
is initiated so set ahead by a minute and wait till time matches then open serial window to set.
Added Adafruit 992- MPL115A2 Baro/Temp Sensor 5volt 12C device
SDA connected to pin Analog 4
SCL connected to pin Analog 5
Code below should be optimized to avoid multiple I2C calls
Added Battery Voltage Monitoring:
Changed A0 to be used for Bus Voltage monitoring (on board LiPo)
Will use voltage divider with 2 10Kohm resistores to monitor the 7.4V supply from battery
Testing- Ran solid 15 hours no issues, 47000 lines recorded, Filesize 2.1MB
Added output for altitude in meters (Thanks Jon)
Used static value of 15 for Temp as using actual temp causes unreliable values indoors