Is there an adapter out there to use an Arduino (over micro usb) with a LiPo?
I found something like these here:
But there is the word 'charger'. So it's only for charging LiPos? I'm searching for an adapter to power my arduino with a LiPo.
The Sparkfun ESP32 has something like this build in:
Which LiPo?
If you have a powerbank like the ones used to charge phones, you simply plug in the USB. It steps up the battery voltage to 5V and all is good.
If you have a multi-cell LiPo you can get a voltage regulator to step the voltage down to 5V.
If you want to power it over micro USB, just get a decent power bank. It'll be safer than a DIY solution.
If you insist on building it yourself, you'll need a boost (step-up) converter for a 5V Arduino, or a step-up/step-down converter for a 3.3V Arduino.
The voltage of a Li-ion cell ranges from 2.8V (or even lower) to 4.2V. You have to keep that in mind when choosing a DC-DC converter.
You need short-circuit protection and over-discharge protection as well.
A small LiPo cell like that one can easily burn your entire house down if you're not careful.
Pieter
