Is there a way to charge a battery with solar panels?

Other Hardware General Electronics
1

I have to make a project wich is going to be a clock working with solar energy but I don't know if there's a way to charge a battery with panels of 5v

2

Google 'solar battery charging'

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3

Kenkai:
I have to make a project wich is going to be a clock working with solar energy but I don't know if there's a way to charge a battery with panels of 5v

Use a lipo charger with a 5 volt input to charge the 3.7 volt battery. Then step the battery voltage down to 3.3 volts and run your clock off that. I really like the Adafruit Pro Trinket 3V and the LiPo backpack for this application. I have a clock that does just that at the shop. If the OP responds, I'll post the details tomorrow night.

4

Isn't it bad that we have to have "If the OP responds..." before we put any effort into the problem.

Unfortunately, with the one post wonders, this is totally justified.

Weedpharma

5

I'm assuming that your clock runs on AA battery. Simply use NiMH batteries and a solar panel + diode like shown in this video.

Solar battery charger :slight_smile:

6

weedpharma:
Isn't it bad that we have to have "If the OP responds..." before we put any effort into the problem.

Unfortunately, with the one post wonders, this is totally justified.

Weedpharma

I hear you wp. I said that for 2 reasons, 1 - to keep me from getting hyped about no response, and 2 - to entice the OP to post.

7

ChrisTenone:
I hear you wp. I said that for 2 reasons, 1 - to keep me from getting hyped about no response, and 2 - to entice the OP to post.

You scare away at least as many people with your avatar :o

8

INTP:
You scare away at least as many people with your avatar :o

In person, I'm even scarier!