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Simple battery meter in raspi project
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PhelarNord:
Hi!

I´m in need of a simple battery meter for device that needs to tell its battery status over a ip network.

The device loads a raspi so i´ll use this one for the input...and on to the network. I dont want to use the i2c or the spi intefaces so
im now left with the gpio´s.

So, what i came up with was the LM339 and four of the raspi's gpio´s. I´ll get four voltage thresholds to display battery health.

Now i wonder if there is even a easier way to do this with even less of the gpios or another smart way to use them that i missed, another
ic maybe?

Cheers
viperidae:
A ds2450, 1 gpio and the w1-gpio kernel driver
PhelarNord:
The DS2450 is a great idea, but it´s obsolete, right?
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