So I'm using LiPos to power my robot. There's a very slight problem.
I'm using the same power line to power a brushless motor and an Arduino. The problem arises when I turn on the motor.
The brushless motor draws huge amounts of power, around 20A. The problem is that the 20A power input from the batteries also goes into the Arduino because of the common power line.
Needless to say, a tiny regulator doesn't like amperages that are way over it's rating. The Nano proceeded to turn into a heating element, shorting out almost every part on the board.
How do I fix this issue? The problem with just using an absolute monster of a resistor is that the current input significantly drops when the weapon turns off, and then the Nano would have next to no input current due to the resistor.
OK so I'm hearing you had a setup wired, somewhere in your testing or operation the Nano died.
My guess is if you don't change something you will likely damage the next one.
Honestly, without a photo or sketch I don't have enough information to help you not damage your Nano's. Usually is simple to protect the Nano's but without knowing how you currently wire your project, its not possible for me to help. Sorry
Then sorry I can't help more. Perhaps you are getting an unintended connections (short). I suggest you inspect your wiring and look for areas a wire or device connection can touch something it isn't intended to.