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Re: [LUG] Battery power for Pi etc

 
Just spotted this:

http://www.instructables.com/id/Create-Your-Own-Solar-Powered-Raspberry-Pi-Weather/step6/Safely-Turning-the-Pi-On-and-Off/

Apologies for the double post.

On 04/09/15 15:00, Tom wrote:

On 04/09/15 14:35, Ben Whorwood wrote:

I use a similar setup for using 12v lead acid batteries from phone
systems as "power banks" at festivals and such for charging devices
using their USB chargers.

You'll need...
http://www.ebay.co.uk/itm/Motorcycle12V-120W-Car-Motorbike-Boat-Tractor-Cigarette-Lighter-Power-Socket-New-/350864583010?hash=item51b128a962 


(Other variations exist (such as crocodile clips for connecting to the
battery), this is just the first one I found similar to the one I have.)

And then a standard cigarette lighter to USB charger (check the specs
for amps you require and that the 12v socket is capable of supplying
enough power for it):
http://www.ebay.co.uk/itm/Micro-Mini-Car-Cigarette-Lighter-to-USB-Charger-Adapter-for-MP3-/251478257627?hash=item3a8d45afdb 


With double+ USB adaptors (ones that have two or more USB sockets), test
before charging using both USB sockets as they have been known to melt!

This creates quite a nice future proofed setup as most things charge
from USB these days.

Depending on the type of battery used it can be set up as a UPS with
trickle charging into the battery as required.

Another cheap option for RPi UPS (mileage may vary):

https://www.youtube.com/watch?v=qev1E7bqNjA

On 04/09/15 14:12, Tom wrote:

Just wondering if anyone knows of a cheap (or DIY Pic job??) Car
Battery to 5v Pi/USB sort of UPS arrangement?
Google is not my friend today....
Tom te tom te tom





Cheers for all the responses.
I was looking for one that actually lets the Pi know the 12V is getting low so the Pi has time to shut-down cleanly (after sending appropriate messages to base ) hence the UPS bit. I've looked at about 100 options (out of several 1000) but none do the battery getting low thingy. 
Tom te tom te tom





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