Optional type:MG90s 
Material:Acrylic 
Color:Black

Difference between MG90S  
MG90S: Metal gear,steering engine,Arduinounor3 development board (Original  version)DIY value

Learning the use of Arduino
Learning potentiometer control servo
Learning serial port control servo
Understand the control principle of automated robotic arms

This is a classic 4-DOF machine that has been around for a long time and is inSPIred by industrial robotic arms. This is an economical, powerful and easy to use Arduino robotic learning kit. The kit is suitable for use in the maker space, college students, and middle school students. The control board adopts the international version of the original arduino UNR 3, and there are many learning materials on the network for easy learning and use.

About control methods
The control method is also very simple, with four knobs to control the movement of each potentiometer, anyone can operate. After connecting the computer with USB, you can send commands through the serial port to control the movement of the servo. It is also compatible with other computer control software, and also supports writing programs to perform fixed and repeated actions.

About assembling
This product expansion board is shipped as a spare part and needs to be soldered by yourself. The assembly of acrylic parts requires a certain amount of patience, we provide a complete graphic tutorial for everyone as a guide. The original knob control program has been burned.
Quantity: 1 set
Note:
Transition: 1cm=10mm=0.39inch
No retail package.
Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid.
Due to the difference between different monitors, the picture may not reflect  the actual color of the item. Thank you!

MG90S: set Package includes:
1 set x Acrylic cutting parts + fixing screws
1 x Arduinounor3 development board (Original version)
1 x Potentiometer control board (need to be soldered by yourself)
1 x 5V2A power adapter
4 x MG90S servos(other accessories demo in the picture is not included.)