# Arduino FIO + Servo **URL:** \ **Category:** Arduino\ **Created:** [August 25, 2012, 9:08am UTC](https://community.sparkfun.com/t/arduino-fio-servo/21893 "2012-08-25T09:08:14Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![udawatabhimanyu4](https://avatars.discourse-cdn.com/v4/letter/u/ecb155/32.png) [@udawatabhimanyu4](https://community.sparkfun.com/u/udawatabhimanyu4)\ **Post date:** [August 25, 2012, 9:08am UTC](https://community.sparkfun.com/t/arduino-fio-servo/21893/1 "2012-08-25T09:08:14Z")
I am using a Tx-Rx setup as follows for controlling an RC airplane: Arduino Uno (ATMega328 + xBee Pro RPSMA at 2.4 GHz, 57600 bps) - runs at 5V Arduino FIO (ATMega328 + Joysticks + xBee Pro Wired Antenna at 2.4 GHz, 57600 bps) - runs at 3.3V with a LiPo. 3 Servos and a Brushless DC Motor with an ESC - I have an 11.1V LiPo. Now, my question is - How can i control servo movements using FIO running at 3.3V? (Does it need voltage boost?) Servos expect their signal to be at 5V. But i have a 3.7V LiPo which powers my Receiver configuration (FIO+xBee Pro). For the BLDC, i have an 11.1V LiPo which connects to the ESC for speed control. But, the ESC will also need to be programed using the FIO (at 3.3V). As in a real RC Receiver, the ESC distributes power from the battery to the Servos (i guess!), that is why i am unable to understand how to connect the FIO (3.3V), Servos (5V) and the BLDC (11.1V).