Solar powered projects, you read a lot about them but still it is difficult to get signal running.
First of all I know this is not optimal. The are many better and many more expensive options. This is what I have and I wonder if we can make something work with this.
I have my solar charger:
This will charge my battery. A 18650.
And now I want to run my arduino from this battery. And here is where the problems start.
It is easy to convert the battery voltage to 5v with one of these:
Works well, led turns off at 2.7v but it has no low voltage cutoffs. So, only this is not enough, it might kill the battery.
So I tried this one:
Works like a charm. Has low voltage cutoff. But only when charging my phone. The arduino does not use enough power to turn the module on.
So, now my idea is to put one of these modules in between.
This has the low voltage cutoff, but missing the boost conversion to 5v. So my idea is to hook the battery up this last shown module, and then hook the first shown 5v boost converter up this module. So then I have cutoff protection, and 5v boost that will activate when having my arduino hooked up.
Any thoughts about this?