Lipo Cut-Off Circuit

Other Hardware Motors, Mechanics, Power and CNC
1

Hello everybody.

I plan to use my Arduino Pro Mini 5V/16MHz in a RC plane for live telemetry (gps) link (my receiver has input for serial datastream).
I want to use a 2s lipo. The lipo will be monitored from the Arduino (with voltage divider).
Now I'm searching for an easy way to cut the voltage from the arduino if the lipo is under a specific voltage.

I also want to use the arduino standalone as a GPS-Logger with the 2s lipo,
but i want destroy the battery.
It should cut-off the voltage without an reaction of the user.

I hope you can understand my problem.

cheers muerzi

2

Hi !
I guess with some transistor you can achieve what you need. And to destroy your lipo, just drop it in a microwave for about 2 minutes, full power :slight_smile:

3

enjoyaol:
And to destroy your lipo, just drop it in a microwave for about 2 minutes, full power :slight_smile:

I know how to destroy my lipo.

but i want destroy the battery.

i ment that i will NOT the lipo.

4

I wouldn't try using the Arduino as a lipo cutoff to itself. You could use it to put the Arduino to sleep, but if you want to cut power to the Arduino completely, just use a dedicated lipo circuit.

A quick google for lipo cutoff circuit should provide you with a whole variety of circuits available, most a fairly simple, using only a handful of components.

5

@jraskell Nothing to add - I just like your signature.

6

you can also buy them assembled....Tenergy Power

7

If the one above doesn't suit your needs or voltage you could make one out of an op-amp (LM358), a Zenner diode and a few resistors. You could set your own cutoff voltage then.