Research Power requirements - Githubissues

UTCSheffield / thelongwellwalk

"The Backpack of Awesome" Raspberry Pi based system for recording and transmitting data from a lone long distance walker. Being built for http://thelongwellwalk.org/

Apache License 2.0

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Research Power requirements #6

Closed mr-eggleton closed 10 years ago

mr-eggleton commented 10 years ago

In order to specify the Solar panels and batteries the manufactures have asked for details of our power requirements. As a starting point we should get the requirements for the items below then add a big chunk of spare.

Running 24 hours a day
- Mobile phone
Running for 10 hours a Day
- Raspberry Pi Model A
- Raspberry Pi Camera
- Powered Hub
- Sensors / Real-time Clock ( http://airpi.es/ ? )
- GPS ( https://www.adafruit.com/products/746 ? )
- Indicator LEDs / LCD screen
- E Paper type screen for maps and info ?
Running for 2 hours per day
- Instant Video Recording on a GO Pro or similar
- Pico Laser Projector

@10hibbardj

mr-eggleton commented 10 years ago

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=29&t=32955

Model A (default clocks) Idle (console): 0.113A 0.587W cat /dev/urandom | gzip: 0.153A 0.795W

mr-eggleton commented 10 years ago

@10penab

mr-eggleton commented 10 years ago

lets assume that any charging from the battery pack to another one is only 50% effecient. I will add that to the spread sheet

mr-eggleton commented 10 years ago

GPS 20 mA

mr-eggleton commented 10 years ago

https://drive.google.com/file/d/0B0CyljGSJ8E2dFBOQS14VUJsaTA/edit?usp=sharing

stretchyboy commented 10 years ago

http://flexiblepv.com/

Tactical look good. (USB out) but the gist is it should be doable, we may need to reduce load to fit all of our criteria for weight etc. but we are not asking the impossible

mr-eggleton commented 10 years ago

Batteries and solar panels on order so we can test it.