Grounds and Electronics
From SEDSWiki
Contents |
Intro
This page is for the grounds and electronics team for the group.
Team Members
| Name | Contact | Area of Specialty |
|---|---|---|
| Jeff Ahern | jeffery.ahern@gmail.com | Programing |
| Matt DePorter | nfaction@gmail.com | |
| Robert Koven | ||
| Tyler Manitakos | ||
| Pye Pye Zaw | pye2zaw@email.arizona.edu |
Talk Board
Things we need to do:
Possibly set up another meeting to get local stuff done Get an Undergraduate HAM Radio Licensed Start looking up GPS information -- For ground and rocket Start looking up possible flight computer configurations Figure out what our requirements for a camera in the rocket are Decide whether recovery electronics will be part of this group or the Rocket Group Begin figuring out who/what groups you might be able to ask for hardware/assistance
Things we have done:
Find a ground station Laptop -- should have two laptops
Ground Station Laptop Ideas
Rocket Computer Configuration
The rocket payload system is a flexible flight computer. The system will have to support a GPS receiver, a wireless data telemetry system, acceleromior and optics recording system.
Verdex XL6P
Processor: Marvell PXA270 with XScale
Speed: 600MHz
Memory: 128MB RAM, 32MB Flash
Features: USB host signals, CCD camera signals
Connections: 60-pin Hirose connector, 120-pin MOLEX connector, 24-pin flex ribbon
Size: 80mm x 20mm
Balloon Computer Configuration
Transmitters and Receiver
XTend™ OEM RF Modules
- Operates within the unlicensed 900 MHz frequency band.
- Small form factor (18 g)
- up to 40 mile range with line of sight (over 200,000 feet)
- Operating temperature: -40° C to 85° C
- Cost $179
GPS
here is a quick GPS review from sparkfun
Copernicus DIP Module
- Cost $75
- Confirmed to work at 100,000 ft by amateur balloonist group link here
- Built in Eval Board
Inventeksys C5.1x
- Cheap receiver ($33)
- custom firmware update(V004) that allows for a 135000 ft
- confirmed to work at 110,000 ft by amateur balloonist Bill Brown here.
Video Feed
Board cameras are mini cameras that feature a lens mounted onto a circuit board. Their size – sometimes as small as one inch by one inch. Some board cameras even utilize pinhole lenses. The average hole size on a pinhole lens is 1/16” diameter. This is the only part of the camera that must be exposed in order for a picture to be obtained. Two camera system technologies are used for imaging in board cameras: CCD and CMOS. CCD stands for charged coupled display and it is also used for imaging in a fixed security camera system. The CCD converts light into electricity that represents picture information. Common CCD sizes are 1/3” and ¼”. 1/3” is currently the standard but larger sizes, such as 2/3” and ½” do exist. CMOS stands for Complementary metal–oxide–semiconductor. It also converts light to electricity but CMOS offers greater integration of functions, allowing for smaller overall size, and can operate at lower power requirements. The tradeoff has been at the expense of image quality. With modern security camera system technology, however, lines have been blurred as CCD cameras have lowered their power requirements and the image quality of CMOS chips have gotten better.
Board Cameras seam to be different than most web cam things. I think this is due to the fact that board cams are used for spying. From what I can tell, 420 lines of resolution is really good(have no clue how many pix that is). I also think that we need something below 1 flux. ~~ Jeff
Ideas (don't be afraid to throw some out)
Some one took a Oregon Scientific ATC3K Video Camera and made it into a spy cam here. Doing this might be the best idea with a differnt cam.
here is a site with some board cameras on it
- PC182XSO
- Sony Super HAD chipset
- 0.1 lux low light rating
- 540 of resolution
- 4mm precision lens
- $130
- KT&C ACE-M381NH
- 1/3" SONY CCD w/HQ1 Chipset
- 520 TV Lines
- 1 Lux/F.2.0
- 38x38mm
- Single Board
- $94
- CVS cam
- Its been done before and should work
- Cheap
- homemade and not tested at high altitude
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