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DeviceCostcomment 
raspberry pi$35  
raspberry pi wifi$12  
arduino starter$65  
arduino 32 bit$50  
arduino wifi shield$85So much more expensive - why? 
breadboard kit$25  
32 GB SD Card$27x2$54
20' Balloons$54x2$108
gps + antenna$30-90ea + shippingAccurate position information is critical. A cheaper GPS may not be able to get as accurate a fix as possible. Also, GPS must be able to function above 60,000 feet. Altitude is commonly limited because of the threat of using GPS technology in missiles. 
thermometer & barometer$20 + shippingApparently barometer modules frequently also have thermometers. 
batteries$43 + shippingThis is for a 24 pack on amazon. We could try shopping around, but it has to be Energizer Ultimate Lithium batteries 
hd camera$160 + shipping  
humidity sensor$17 + shipping  
server space$230.21/yrhosting of data 
GPS Cable$6 eahttps://www.sparkfun.com/products/9123 
Raspberry Pi GPIO Breakout Kit$10http://www.adafruit.com/products/1105 
26-pin ribbon cable$5http://www.adafruit.com/products/862 
parachute$50 ea  
onboard radio$69.50https://www.argentdata.com/catalog/product_info.php?cPath=25&products_id=134&osCsid=j2mse3238a3mt7jd5oifo2c7g7 See Communications. 

Total Budget: $1600

Remaining: $118.64

DeviceCostcomment
ground radio$0?I have a wideband receiver that can be used, but we would need a directional antenna in order to use it. It may be possible to borrow this equipment from an amateur radio operator.
antenna for ground radio$0?May be able to borrow this from an Amateur Radio operator.
grounding rod$0?Needed to reduce the chance that static electricity may ignite the balloon. Ian has some metal fence posts at home that may be used.
styrofoam cooler$7 eaCase for the stuff. A link to the Walmart page can be found here
filler foam  
altimeter---Altitude can be calculated from barometric pressure.
gravimeter---A high altitude balloon doesn't fly high enough to make a significant difference in gravity, since gravity is calculated relative to the center of mass.
anemometer---Not feasible, as this would create a "sharp" point that could hurt somebody or damage something on the return descent. May be able to get wind readings by using measuring the speed of fans, placed on different sides of the payload.

Page last modified on June 20, 2013, at 04:50 PM