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

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# telegraph - making
### ~avatar
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Let's build a telegraph between two @boardname@s.
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### ~
![](/static/mb/lessons/telegraph-0.png)
## Materials
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* @boardname@, battery holder and 2 AAA batteries
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* Crocodile clips
## Steps
### Step 1
![](/static/mb/lessons/banana-keyboard-1.png)
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Using the 1st crocodile clip, connect the end of the crocodile clip onto GND pin on the @boardname@.
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### Step 2
![](/static/mb/lessons/ornament-chain-2.png)
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Using the 2nd crocodile clip, connect the end of the crocodile clip onto the 3V pin on the @boardname@.
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### Step 3
![](/static/mb/lessons/ornament-chain-3.png)
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Using the 3rd crocodile clip, connect the end of the crocodile clip onto pin 1 of the @boardname@.
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### Step 4
![](/static/mb/lessons/ornament-chain-4.png)
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Using the 4th crocodile clip, connect the end of the crocodile clip onto pin 2 of the @boardname@.
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### Step 5
![](/static/mb/lessons/ornament-chain-5.png)
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Using the 1st crocodile clip, connect the unattached end of the crocodile clip onto the GND on the 2nd @boardname@.
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### Step 6
![](/static/mb/lessons/ornament-chain-6.png)
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Using the 2nd crocodile clip, connect the unattached end of the crocodile clip onto the 3V pin on the 2nd @boardname@.
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### Step 7
![](/static/mb/lessons/ornament-chain-7.png)
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Using the 3rd crocodile clip, connect the unattached end of the crocodile clip onto pin 2 of the 2nd @boardname@.
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### Step 8
![](/static/mb/lessons/ornament-chain-8.png)
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Using the 4th crocodile clip, connect the unattached end of the crocodile clip onto pin 1 of the 2nd @boardname@
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### Step 9
![](/static/mb/lessons/telegraph-0.png)
### ~button /projects/telegraph/manual-telegraph
NEXT: manual telegraph
### ~