Why is uArm shield and FTDI drivers required?

1

Generally, Arduino boards do not need a driver/shield to drive the servos. Shields are used to drive stepper and DC motors. What is the reason for using the shield ?
Arduino UNO board does not require FTDI drivers to be installed because they use a different communication IC.[Source: How to Install FTDI Drivers - SparkFun Learn]
Why is it required to install FTDI drivers on the UNO board ?

2

Hi,
because arduino just give out the angle by pwm signal, the power of the servo is provided by the AC adapter.

3

Thanks Lily! If you could clarify the need to install the FTDI drivers on UNO, it would be great! I know FTDI has something to do with serial communication.

4

you no longer have to install ftdi drivers if you have a arduino board with a 8u2 or 16u2 comm chip on the arduino board

5

Thank you for the quick response Nick !

6

also the shield just provides an external power source for the servos.