# IOBit Expansion Board

IOBit(HKBC8009A)

![](https://kittenbothk-eng.readthedocs.io/en/latest/_images/27.jpg)

IOBit is a basic expansion board designed for Micro:bit, as the name suggests, IOBit makes the all IO pins of the Micro:bit accessible.

### Product Details

IOBit is a low cost expansion board for Micro:bit, it extends all the IO pins of the Micro:bit into Dupont connectors for easy access. IOBit is equipped with a buzzer and a 3.5mm audio jack for making sounds with Micro:bit. It also has a power port to supply 3V or 5V power to your hardware. The edge connectors of the Micro:bit is preserved for users familiar with using crcodile clips.

### Special Features

1. Converts the edge connectors pins of the Micro:bit to the standard 3 pin format. The singal, vcc and gnd pins can be distinguished by their colors.
2. Equipped with short circuit protection and a resettable fuse, avoiding dangers such as short circuiting because of incorrect connection.
3. Preserves the 3 pin edge connector of the Micro:bit, allowing users who are used to this system to use the board.
4. 2 pin holes compatible with standard Lego Technic pins allow easy integration of the expansion board to your robotic projects.

### Specifications

* Dimensions: 56.8x44x12 mm
* Power Input: USB 5V/Micro:bit Battery Box 3V
* Power Output: 3.3V\~5V, maximum 1A

![](https://kittenbothk-eng.readthedocs.io/en/latest/_images/18.jpg)

### Built-in devices

* 3 Pin IO Edge Connector
* Buzzer and toggle switch
* 3.5mm audio jack
* 5V USB Port
* Power switch

#### 5V Input

![../../\_images/36.jp](https://kittenbothk-eng.readthedocs.io/en/latest/_images/36.jpg)

1. Plug in a USB power supply
2. Press the power switch
3. The power indicator will light up
4. The 5V pins can now be used.

#### P0 Buzzer Toggle

![](https://kittenbothk-eng.readthedocs.io/en/latest/_images/44.jpg)

Pin 0 is occupied by the buzzer, use this switch to toggle buzzer on or off

### Demo Video

{% embed url="<https://www.youtube.com/watch?v=AAPAdGBl3ig>" %}

### Precautions:

1. Do not use high current devices, large servos or motors with this board, as this may result it damaging the Micro:bit.
2. The 5V power supply is able to run multiple small servos as long as the total current is less than 1A.
3. Using Pin 0 requires the buzzer to be switched off or the buzzer may buzz erratically.
4. Since Pin 3 to Pin 11 are used by Micro:bit’s LED Matrix, the matrix needs to be turned off or it may light up erratically.
5. Do not connect to a USB power with current exceeding 1A.