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Michal Moskal
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# telegraph activity
build a telgraph #microbit #docs
# BBC micro:bit telegraph
![](/static/mb/lessons/telegraph-0.png)
In this project, you will build your telegraph between BBC micro:bits. Project duration: 15 minutes.
## Materials
* BBC micro:bit, battery holder and 2 AAA batteries
* Crocodile clips
## Steps
### Step 1
![](/static/mb/lessons/banana-keyboard-1.png)
Using the 1st crocodile clip, connect the end of the crocodile clip onto GND pin on the BBC micro:bit.
### Step 2
![](/static/mb/lessons/ornament-chain-2.png)
Using the 2nd crocodile clip, connect the end of the crocodile clip onto the 3V pin on the BBC micro:bit.
### Step 3
![](/static/mb/lessons/ornament-chain-3.png)
Using the 3rd crocodile clip, connect the end of the crocodile clip onto pin 1 of the BBC micro:bit.
### Step 4
![](/static/mb/lessons/ornament-chain-4.png)
Using the 4th crocodile clip, connect the end of the crocodile clip onto pin 2 of the BBC micro:bit.
### Step 5
![](/static/mb/lessons/ornament-chain-5.png)
Using the 1st crocodile clip, connect the unattached end of the crocodile clip onto the GND on the 2nd BBC micro:bit.
### Step 6
![](/static/mb/lessons/ornament-chain-6.png)
Using the 2nd crocodile clip, connect the unattached end of the crocodile clip onto the 3V pin on the 2nd BBC micro:bit.
### Step 7
![](/static/mb/lessons/ornament-chain-7.png)
Using the 3rd crocodile clip, connect the unattached end of the crocodile clip onto pin 2 of the 2nd BBC micro:bit.
### Step 8
![](/static/mb/lessons/ornament-chain-8.png)
Using the 4th crocodile clip, connect the unattached end of the crocodile clip onto pin 1 of the 2nd BBC micro:bit
### Step 9
![](/static/mb/lessons/telegraph-0.png)
Your telegraph is ready!
### Step 10
* Connect the first BBC micro:bit to your computer using your USB cable and run the [telegraph](/microbit/xvmxti) script on it.
* Connect the second BBC micro:bit to your computer using your USB cable and run the [telegraph](/microbit/xvmxti) script on it.
* The first person and second person take turns pressing button A to play the telegraph game!