Which battery for this project?

Projects General Guidance
1

Hi guys,

I am building a project with an ATmega328P (TQFP) running at 1MHz, 2x 595 shift registers, LM60 temp sensor and 14 SMD 1206 LED.

The PCB can't be bigger than 90x50mm and the battery must be the small and slimmest possible.

I tried using a button 3v Volt cell but I can't power up the board.

Do you guys have any cheap, small and slim battery solution?

Thanks.

2

I don't think button cells can provide anything close to enough current.

You can get small LiPo cells - a single cell produces 3.6v. However they can go on fire if they are not charged carefully. HobbyKing's website has a lot of them.

Apart from that you probably need to use regular Alkaline of NiMh cells.

How many amp-hrs does your project need?

...R

3

Robin2:
I don't think button cells can provide anything close to enough current.

You can get small LiPo cells - a single cell produces 3.6v. However they can go on fire if they are not charged carefully. HobbyKing's website has a lot of them.

Apart from that you probably need to use regular Alkaline of NiMh cells.

How many amp-hrs does your project need?

...R

You're right and I'll try another approach.

This board is to impress someone and it was intended to be used without any external power supply. The idea was wrap the package and see it working :wink:

So, I really needed a cheap/small/slim solution, however powering up a board like this is impossible with coin cells.

The solution I decided is using an USB plug into the board and power it up using an USB port. :confused:

Let's see if this solution creates the impression I want to.

Thanks