I want to use an external 12V DC power supply. What should be the max current rating of the power supply? Would 2 Amps be sufficient?

Do you have any cad drawings for it. Becasue the link that was posted for the 3D model doesn't work.

Can I have the link to the best arduino that I can use to control the motors, and the lidar and ultrasonic sensors?

Can it support both a lidar and ultrasonic sensors, or do they have to be attached seperately?

Hello, Do you know where to buy just the little frontside plate ?
I need just this plate for my project
thanks in advance

Sorry for the ambiguous specification of Servo port. We will later modify this part in our wiki page.

Here is the detailed explanation:
https://www.dfrobot.com/wik...

###Servo Power terminal

* It integrated an external servo power terminal. The range of this power input is about 5~12v. We recommend you to use 5v. So the servo power supply extension won't break the digital sensors connected to the 3p digital sensor interface. However,for driving 6~12v servos with the voltage input higher than 5v, it's not available to extend 5v sensor on all the digital sensor interface anymore.
* The servo power terminal won't supply system working voltage.

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In your case, we recommend get the 6 V (4*1.5V) from battery and connect to Servo port.
However noted that all the VCC port of the digital port will be 6V. https://uploads.disquscdn.c...

Higher voltage would be better.
The digital port power input is for powering the digital pins, it's the same as"SERVO PWR"
You can refer to the projects about how to use the platform.

What is the main board you are using? if possible, you can try a 7.4V Lipo battery to test, since Lipo battery has higher current to drive all the components.

Please, could you confirm that the wheel encoder with SKU: SEN0038 are compatible with the Pirate-4WD Mobile Platform?