# Ring:bit Introduction ## Expansion Board of Ring:bit car 2 - The Ring:bit expansion board is a simple PCB for the micro:bit. The Ring:bit extends the micro:bit's 3 GPIO ports. We will use this module to convert the P0/P1/P2 port to the common GVS port. It can be loaded 3 AAA batteries to drive the car or other components. ![](./images/9hlUnYx.png) ## The Special Expansion Board of Ring:bit car 2 - The Special Expansion Board of Ring:bit car 2 is for adding extendibility of Ring:bit car. With two Rainbow LEDs and a special expanded port for special expansion module connection. - There is a slide switch on the board, slide it to “Rainbow LED” for using of two Rainbow LEDs; slide the switch to the “Other modules” for using other modules. Please note that these can not be operated at the same time. ![](./images/74l1cY4.png) ![](./images/MVoGDx1.jpg) Please note that the Ring:bit car version 2 has been upgraded. It is diffrent from the Ring:bit car version 1. All related documents refers to the Ring:bit car version 2. [Information of the Ring:bit car version 1](http://www.elecfreaks.com/learn-cn/microbitKit/Ring_bit_Car_Kit/index.html)