[Linux] Beagleboard on Batteries
You can choose for the $80 Beaglejuice battery that carries a small lipo battery. But i find the price a bit too hefty, although it looks good. The prices of liquidware are not quite cheap as well; plus, they advertise “open source electronics” but their circuitry seems closed source as i cound’t find a single schematic; which i don’t really need.
For use with beagleboard [needs 5V +-1A], you can use a single 3.7V lipo and boost it to 5. Its hard to do well if you want the 1A power. Easier and more reliable is just to take two lipo’s and regulate them down to 5V. This needs a total of 1 component; the regulator: and some capacitors for filtering.
It’s fairly ineffecient (regulator gets warm) but so ok.
You can also use some AA batteries. Using four rechargables work (1.2×4=4.8V) but this is dangerous due to overcharge or whatever, so don’t do this. Otherwise, just use more AA’s and regulate it down.
My first measurements indicate the beagleboard runs at 5.00V exactly, using 0.3A during startup and 0.6A during idle state running Ubuntu-Ethernet-Remote Desktop. The setup as indicated in the video ran well for one hour, after i decided the setup worked well.
I have tried to draw this schematic to comply to ISO regulations: