Timo Juhani Lindfors timo.lindf...@iki.fi writes:
joa...@verona.se writes:
I would like to calculate how large battery capacity I need to have all
the subsystems running(wifi, gps, gsm, bluetooth) + an external 3g
modem. I would like to have 24h continuous uptime without suspend. (if i
need a car battery to do it, so be it :)
$ wget http://iki.fi/lindi/openmoko/energy2.txt$ cut -d' ' -f6 energy2.txt |
sort -n | tail -n1
896437
shows that the largest peak consumption I have ever hit is 900 mA
(voltage is around 4.3 V).
$ grep Discharging energy2.txt | cut -d' ' -f6 | grep ^[1-9] a
$ gnuplot
gnuplot set terminal dumb
gnuplot plot a
90 ++-+-+--+-+--+--+-+--+-+-A+
+ + + + + + + + + a + A AA+
80 ++ A++
| A |
70 ++ A++
| A |
| A |
60 ++ A++
| A |
50 ++ A++
| AA |
40 ++AA ++
| |
30 ++AA ++
| |
| |
20 ++ AA++
| AA |
10 ++ AA ++
+ + + + + + + + + +
0 AAA+-+--+-+--+--+-+--+-+-++
0 500 1000 1500 2000 2500 3000 3500 4000 4500
5000
shows that the normal consumption in my use is around 300 mA.
Fantastic answer, thanks!
--
Joakim Verona
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