hello am kinda stuck here , i m building a quad-copter project in class using arduino but the motors take 3.7v from the supply but i need 6v for the arduino am planning on connecting two 3.7 v 500maH batteries in series to power the arduino but then i need to step down the voltage to power the motors. The motors are being driven using mosfets and work fine when i connect the arduino to a power supply separately but when i use batteries i need to step down the voltage i am unsure of which regulator to use these are only small dc brushed micro motors so they do not draw a lot of current anyone who can help or at least point me in right direction? cheers
Hi, welcome to the forum.
Which Arduino board are you using ?
A 8MHz Arduino can run from a 3.7V Li-ion or Lipo battery.
It is possible to use a DC-DC boost converter, to make 5V out of 3.7V.
That makes it possible to power an Arduino board at the 5V pin with 5V. But in most cases a protection diode is needed from the 5V pin to the VIN pin. And current from the battery could flow into the computer when the USB cable is connected.
I think it is better to use a single battery cell, and create the voltages that you need from that.