pxt-calliope/docs/projects/telegraph/make.md

# Make

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Let's build a telegraph between two @boardname@s.

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![](/static/mb/lessons/telegraph-0.png)

## Materials

* 2 @boardname@s, a battery holder, and 2 AAA batteries
* 4 crocodile clips

## Steps

### Step 1

![](/static/mb/lessons/banana-keyboard-1.png)

Connect the end of the **1st** crocodile clip to the **GND** pin on the @boardname@.

### Step 2

![](/static/mb/lessons/ornament-chain-2.png)

Connect the end of the **2nd** crocodile clip to the **3V** pin on the @boardname@.

### Step 3

![](/static/mb/lessons/ornament-chain-3.png)

Connect the end of the **3rd** crocodile clip to pin **1** of the @boardname@.

### Step 4

![](/static/mb/lessons/ornament-chain-4.png)

Connect the end of the **4th** crocodile clip to pin **2** of the @boardname@.

### Step 5

![](/static/mb/lessons/ornament-chain-5.png)

Connect the other end of the **1st** crocodile clip to the **GND** on the second @boardname@.

### Step 6

![](/static/mb/lessons/ornament-chain-6.png)

Connect the other end of the **2nd** crocodile clip to the **3V** pin on the second @boardname@.

### Step 7

![](/static/mb/lessons/ornament-chain-7.png)

Connect the other end of the **3rd** crocodile clip to pin **2** of the second @boardname@.

### Step 8

![](/static/mb/lessons/ornament-chain-8.png)

Connect the other end of the **4th** crocodile clip to pin **1** of the second @boardname@.

### Step 9

![](/static/mb/lessons/telegraph-0.png)


## ~button /projects/telegraph/code

NEXT: Code

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