Arduino Scratch mapping example

If you want to use sensor data in your application you probably want to map the values to a different range. Below a visualisation of the formula that you can use for that. Drag the sliders to change the virtual sensor input value and the maximum value of the sensor.

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You can use this formula in every programming/scripting language of course. Below you can download a more complex example for Scratch4Arduino (S4A) that I use in my classes (it also includes a smoothing formula). s4a-mapping-smoothing-v3.zip The Arduino and Processing languages already have an implementation of this formula in the map() function. For an example see this post: Arduino Programming – Map and smooth values