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DIY Acrylic Robot Arm Robot Claw for Arduino Kit 4DOF Toys Mechanical Grab Manipulator Tools


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100% brand new and high quality
Optional type:MG90s set, SG90 set(as your choose)

Difference between MG90S and SG90:
MG90S: Metal gear,steering engine,Arduinounor3 development board (Original version)
SG90: Plastic gear, steering engine,Arduinounor3 development board (China 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
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!

SG90 Package includes:
1 set x Acrylic cutting parts + fixing screws
1 x Arduinounor3 development board (China version)
1 x Potentiometer control board (need to be soldered by yourself)
1 x 5V2A power adapter
4 x SG90 servos(other accessories demo in the picture is not included.)


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.)

Item Type








Mfg Series Number


Completion Degree

Semi-finished Product

Commodity Attribute


By Animation Source


Soldier Accessories

Soldier Set



Remote Control


Puppets Type


Age Range



robot arm


robot arm

Model Number

for Arduino Kit 4DOF Toys

Version Type

First Edition


In-Stock Items



Original Package


Brand Name


Unit Type


Package Weight

0.5kg (1.10lb.)

Package Size

20cm x 10cm x 10cm (7.87in x 3.94in x 3.94in)

Shipping and delivery

We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.

How do you ship packages?

Packages from our warehouse in China will be shipped by ePacket or EMS depending on the weight and size of the product. Packages shipped from our US warehouse are shipped through USPS.

Do you ship worldwide?

Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.

What about customs?

We are not responsible for any custom fees once the items have shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.

How long does shipping take?

Shipping time varies by location. These are our estimates:

Location*Estimated Shipping Time
United States10-30 Business days
Canada, Europe10-30 Business days
Australia, New Zealand10-30 Business days
Central & South America15-30 Business days
Asia10-20 Business days
Africa15-45 Business days
*This doesn’t include our 2-5 day processing time.

Do you provide tracking information?

Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.

My tracking says "no information available at the moment".

For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.

Will my items be sent in one package?

For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you have specified combined shipping.

If you have any other questions, please contact us and we will do our best to help you out.

Refunds & returns policy

Order cancellation

All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.


Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:

  • You do not receive them within the guaranteed time (45 days not including 2-5 day processing)
  • You receive the wrong item
  • You do not want the product you have received (but you must return the item at your expense and the item must be unused)

We do not issue the refund if:

  • Your order does not arrive due to factors within your control (e.g. providing the wrong shipping address)
  • Your order does not arrive due to exceptional circumstances outside our control (e.g. not cleared by customs, delayed by a natural disaster)
  • Other exceptional circumstances outside the control of

*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on page.

If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.


If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.

Please do not send your purchase back to us unless we authorise you to do so.

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