40 lines
931 B
Markdown
40 lines
931 B
Markdown
# Magnetic Force
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Find the amount of magnetic force (the strength of a magnet) in the direction you say.
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```sig
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input.magneticForce(Dimension.X);
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```
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## ~hint
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The micro:bit measures magnetic force with **microteslas**.
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## ~
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### Parameters
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* a [string](/reference/types/string) that says which direction the micro:bit should measure magnetic force in: either `x` (the left-right direction), `y` (the forward/backward direction), or `z` (the up/down direction)
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### Returns
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* a [number](/reference/types/number) of microteslas that means the strength of the magnet
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### Example: metal detector
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This program makes the center LED of the micro:bit get brighter when
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the magnetic force is stronger, and dimmer when it is weaker.
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```blocks
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led.plot(2, 2)
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basic.forever(() => {
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let f = input.magneticForce(Dimension.X)
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led.setBrightness(f / 2000)
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})
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```
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### See also
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[compass heading](/reference/input/compass-heading)
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