LiPo batteries to run servo motor

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1

I have a project where I wish to run a servo motor occasionally from an Arduino and powered by a solar cell charging a LiPo battery.

The issue seems to be that the Arduino and especially the servo want more than 3.77 volts from the battery.

So… Can I use two solar cells and charge two LiPo batteries in series to get 7.54 volts? Does this require two Solar Buddy’s?

Thanks,

Peter

2

You need a special charger for two LiPo batteries in series, and most servos won’t tolerate > 7 V.

An 8MHz Arduino will run fine on 3.7 V. For the servo, use a boost converter like this (5V) one: https://www.pololu.com/product/2115

3

Wow. Thanks. $4 for a voltage step up converter looks so simple and easy.

Now I’m worried about the voltage dropping on the battery so low it cuts out and then it won’t recharge.

But, that may be for another post.

Peter