Arduino Forum

Using Arduino => Motors, Mechanics, Power and CNC => Topic started by: _Alain_ on Feb 16, 2016, 03:01 pm

Title: Powering Pro Mini 5V with a 3.7V Lipo ?
Post by: _Alain_ on Feb 16, 2016, 03:01 pm
Hi

By mistake I bought an Adruino Pro Mini 5V instead a 3.3V.
I have a Lipo 3.7V, 1000mAh.

I've read that I have to use a "Convertor" to power the Pro Mini 5V with a 3.7V Lipo.
But I'm unsure what kind of specifications this "Convertor" needs.
Can anybody please direct me to the right product ?

Or is there another way to use the 3.7V Lipo with Pro Mini 5V ?

Kind regards
Alain
Title: Re: Powering Pro Mini 5V with a 3.7V Lipo ?
Post by: alka on Feb 16, 2016, 04:53 pm
Here are a couple of options.

There are Dc-Dc step up converter such as this one https://www.sparkfun.com/products/10968.
There are probably cheaper sources than sparkfun but this is an example.

The arduino won't reliably run at 16 Mhz much below 5 volts.

You could burn a bootloader to use the internal clock at 8 Mhz. The Board will then run on 3 volts and above. You will want to plug your lipo in to the VCC pin rather than RAW.


You could also get a 2s (7.4v) Lipo instead and use it as is. You can probably find one that size for under 10 dollars.