# FB0002 fox:bit T-type robot expansion board

![1](./media/1.png)

## Description

This expansion board supports an input power supply of DC5V and comes with one IIC interface, a serial communication interface, an analog/digital interface, and a speaker interface. It is equipped with a built-in DC-DC step-down circuit for DC5V to DC3.3V step-down conversion. Besides, it supports our Fox:bit and Micro:bit series products, and can be used to connect external speakers and other sensor modules.

### Parameters

- Input voltage: 5V
- Output voltage: 3.3V/5V
- Pin functions: Analog or digital /IIC communication/speaker/serial communication
- Appearance: Black oil with white characters
- Dimensions: 57 *46.5 *12MM
- Operating temperature: 0 to 50℃
- Weight: 14g

## Schematic Diagram

![2](./media/2.png)

## Interface Introduction

| Shield | Micro:bit | Fox:bit |
| :-- | :-- | :-- |
| S1 | P9 | IO16 |
| S2 | P8 | IO17 |
| S3 | P1 | IO14 |
| s4 | P0 | IO12 |
| SDA| P19| IO22 |
| SCL| P20| IO21 |

According to the above table, you can query the corresponding extension pins with the development board you are using.

![3](./media/3.png)