Hello, I'm working on my very first Arduino project which is Robo arm.
It has 4 servos MG90S
Arduino Uno and shield
So i need help. I have no idea how to make it work. If you have a code or link with step-by-step explanaion i will appreciate it)
you mean you bought the full thing and it did not come with any documentation?
I have documentation but its all in chineese. And software that came with it doesnt work 
Don't withdraw post, just edit them and fix what was wrong.
it seems that all the parts are exposed and you get the 4 sets of wires from the Servo so it's just a matter of driving the Servos the way you want --> check the Servo library out
it also seems that the shield on top of the UNO is the "SENSOR SHIELD V5".
The 5X Version has the ability to separate the 5V supply going to all the 3-pin connectors and feed them from a separate external power supply. This is what you'll need to do for running your Servos as the UNO won't have the power to drive your 4 MG90S.
There are documentations on line for this, here is one I found with a quick googling
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