Make: Wearable Electronics by Kate Hartman

Author:Kate Hartman
Language: eng
Format: epub, mobi
Tags: COMPUTERS / Hardware / General
ISBN: 9781449336509
Publisher: Maker Media, Inc
Published: 2014-08-12T04:00:00+00:00

map(lightSensorValue, 25, 940, 0, 255)

Figure 7-14. Mapping a value from 25–940 to 0–255

If you are working with a LilyPad light sensor as your input and using the mapped value to control an LED on the analog output pin, you would have an LED that brightens and dims in a way that mimics the conditions of the room. If you wanted to inverse the relationship so that the LED gets brighter as the room gets darker, you can simply flip the to values, as illustrated in Figure 7-15:

map(lightSensorValue, 25, 940, 255, 0)

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