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Topic: How to determine how long batteries will last for my project? (Read 681 times) previous topic - next topic


Increasing the batteries in series just increases the voltage - not the mAh.
If you connect in parallel then you have to start playing games to account for then running down at different rates.

I have a 1000mAh LiPo in a remote control running an 8 MHz promini that mostly sleeps, a 434 MHz Tx modukle, and 16 button keypad. Lasts several weeks to a month between charges.  Added a Maxim 1811 charge control chip to recharge it from 5V source.

Bring the power in to an analog pin and measure it when the PIR wakes the processor up.
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.


You guys rock - thank you so much!

By the way, I found this cool battery life calculator: http://oregonembedded.com/batterycalc.htm


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