pxt-calliope/docs/lessons/crocodile-clip/activity.md

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# crocodile clip activity
Use the crocodile clips
# micro:bit crocodile clip
![](/static/mb/blocks/lessons/crocodile-clip-0.jpg)
In this project, you will build a circuit with the micro:bit from crocodile clips. Project duration: 15 minutes.
## Materials
* 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 micro:bit.
### Step 2
![](/static/mb/crocodile-clips-2.jpg)
Using the 1st crocodile clip, connect the unattached end of the crocodile clip onto the 0 pin on the micro:bit.
### Step 3
![](/static/mb/blocks/lessons/crocodile-clip-0.jpg)
Disconnect the end of the crocodile clip from the 0 pin of the micro:bit.
Your circuit is complete!
### Step 10
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Connect your micro:bit to your computer using your USB cable and run the [guess the number](/lhpkbr) script on it.
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