The batteries will power 3 volts each, combining to make 6 volts, which should be possible, right? I would be using a standard 9 volt battery, but this is for a project where the entire thing has to be under 40 grams, and considering my 9 volt weighs well over 50, that won't be an option, so I started looking for lighter alternatives, and I thought of watch batteries. If it's not possible, do you know any lighter alternatives that might be able to work? Three triple a batteries and the nano together weigh an even 40 grams, but that won't work with the sensors I plan to put on it. Any help?
Not at over 6 volts. Check each with a meter. Be sure you can easily replace them when they give up.
Not at over 6 volts.
What do you mean?
Also, IK they have a short lifespan, just would it be possible?
I mean MEASURE the actual voltage of each cell. You need to have 5 volts for your Arduino, NOT 6 or 6+ volts.
So they go down in voltage when they lose lifespan? Or does it have to be exactly 5 volts?
A 3.3V Lipo cell (say 600mAh) with a boost converter would make more sense. There are some very small boost converters out there. That would be pretty small and light.
If you are using battery power the Nano has some power wasting components that a Pro Mini does not have.
If you power a Pro Mini via the 5V pin, it will run for a short while on 3V from one CR2032, although the 16 MHz clock is out of spec and not advised.
Yes, they do. I have some old ones that have about 0.2 volts. Your NANO needs from 4.8 to perhaps 5.1 volts for operation. Read the documentation.
Ok, that sounds GREAT, but one small issue. The lipo cell is too big. Is there one under 1 inch in width that would work as well? also how heavy is it? Or would the step up work with a double a or triple a?
Huh, so guess that's out of the question.
What do you mean by that? Sry im new to this
I found a smaller one! Thanks so much for your help! this leaves 15 grams left over for the rest of it! Thx a ton!!!
Two AAA Lithium Energizers will power a 3.3V Pro Mini direct, just remove the regulator and LEDs.
AAA Lithium Energizers - Battery capacity of 1200maHr, 7.4g each. Good down to -40c, 25year shelf life.
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