How do I arrange the voltages..

Using Arduino General Electronics
#1

Hi there

I’m working on a quadcopter and before I start with buying anything I want to make sure everything is okay.

My power supply is a Li-Po Battery 7.4v / 2200 mAh.

It has to power the arduino, 4 Electronic speed controllers and 4 motor.
http://www.hobbyking.com/hobbyking/store/_12909__Turnigy_2730_Brushless_Motor_1500kv_DE_Warehouse.html ← Motor
http://www.hobbyking.com/hobbyking/store/__4204__TURNIGY_Plush_10amp_9gram_Speed_Controller.html ← ESC

My question is, the motor needs 7,4V input, and the ESC needs 5V how can I give 7,4V to the motor and 5V to the arduino & ESC.
I might be wrong with the voltages, so check those links if you want to!

Thanks !

#2

That is all handled inside the ESC with it's BEC (battery eliminator circuit), it takes the 2 cell Li-po voltage and internally regulates it to 5vdc for the esc controller AND outputs +5vdc to the red wire on the 3 pin servo connector. So just wire the servo connector to the arduino (ground pin, +5vdc pin, and digital output pin) and your done.

Lefty

#3

retrolefty: That is all handled inside the ESC with it's BEC (battery eliminator circuit), it takes the 2 cell Li-po voltage and internally regulates it to 5vdc for the esc controller AND outputs +5vdc to the red wire on the 3 pin servo connector. So just wire the servo connector to the arduino (ground pin, +5vdc pin, and digital output pin) and your done.

Lefty

Aha, thank you very much ! First time working with ESC's with an Arduino so, thanks for your help :).

Is there any way to give my arduino more than 5 analog input ports btw? Or do I have to get the Arduino Mega then.. Need only 8 analog inputs :)

#4