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pxt-calliope/docs/reference/input/magnetic-force.md

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Magnetic Force

Find the amount of magnetic force (the strength of a magnet) in the direction you say.

input.magneticForce(Dimension.X);

~hint

The micro:bit measures magnetic force with microteslas.

~

Parameters

  • a 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)

Returns

  • a number of microteslas that means the strength of the magnet

Example: metal detector

This program makes the center LED of the micro:bit get brighter when the magnetic force is stronger, and dimmer when it is weaker.

led.plot(2, 2)
basic.forever(() => {
    let f = input.magneticForce("x")
    led.setBrightness(f / 2000)
})

See also

compass heading