<![CDATA[Battery Level and Step Up Power Converter]]>I don't think this was discussed before so here are the questions:

How would I know the battery level if I measure it before the step up power converter.

If I am correct I can not use the 1.1 reference because the supplied current is always the same.

Is it as simple as compare the input on A0 (in the sample) with the measured current using my multi meter?

Would the formula be comparable if I use 2 x 10MOhm resistors instead of what is mentioned 1MOhm and 470KOhm.

]]>https://forum.mysensors.org/topic/435/battery-level-and-step-up-power-converterRSS for NodeSat, 05 Sep 2026 08:31:14 GMTSat, 27 Sep 2014 21:00:04 GMT60<![CDATA[Reply to Battery Level and Step Up Power Converter on Sat, 04 Oct 2014 14:01:15 GMT]]>@marceltrapman
Good question, one in which I have no answer. My sensors typically return ~75% for 2 fully charged AA batteries.

]]>https://forum.mysensors.org/post/5246https://forum.mysensors.org/post/5246Sat, 04 Oct 2014 14:01:15 GMT<![CDATA[Reply to Battery Level and Step Up Power Converter on Sun, 28 Sep 2014 07:20:25 GMT]]>@ServiceXp said:

@marceltrapman I take "before" as before the converter as in off the battery directly?

That is exactly what I mean :)

I use the Vin post on the converter to supply the battery sense circuit.

What I fail to see, probably my ignorance, is how I can recalculate the outputted value on A0 (in case of the example) to a value that really represents the battery level.

]]>https://forum.mysensors.org/post/5058https://forum.mysensors.org/post/5058Sun, 28 Sep 2014 07:20:25 GMT<![CDATA[Reply to Battery Level and Step Up Power Converter on Sat, 27 Sep 2014 23:12:16 GMT]]>@marceltrapman
I'm not sure I understand.. I take "before" as before the converter as in off the battery directly? Do you mean something else?

I use the Vin post on the converter to supply the battery sense circuit.

]]>https://forum.mysensors.org/post/5046https://forum.mysensors.org/post/5046Sat, 27 Sep 2014 23:12:16 GMT