49 lines
1.5 KiB
Markdown
49 lines
1.5 KiB
Markdown
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# Crocodile clips
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The large holes at the bottom of the board are designed to attach alligator/crocodile clips
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to create electrical circuit with other components.
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# ~hint
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**No crocodile clips!?!?!** Use [wires or aluminium foil](/device/foil-circuits)!
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# ~
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## Connecting crocodile clips
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The hole for ``P0`` and ``GND`` allow to grab the board on the side which makes for a great grip.
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Pass one jaw in the hole and grab the side of the board with the other jaw.
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For the center holes, ``P1`` and ``P2``, you can also grab the bottom of the board but they are a bit harder to grip.
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You can also grip the board between the jaws. In which case, you will want to make sure to avoid overlapping the jaws
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with the other pins as it will create short-circuit in the board.
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Adding a little tape helps keeping the crocodile clips in place.
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## Example: on pin pressed with random numbers
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This example displays a random number every time the crocodile clip holds `GND` then connects and disconnects the `P0` pin.
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Each time the crocodile clip is firmly connected and disconnected from pin `P0`,
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the @boardname@ will return a random Number between 0 and the parameter limit.
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```blocks
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input.onPinPressed(TouchPin.P0, () => {
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basic.showNumber(randint(0, 10))
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})
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```
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## See also
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[micro:bit pins](/device/pins)
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