Calculating Arduino Write Values

2352 × 3300 Lesson 11: Arduino Circuit to Dim LED with Potentiometer
Linear Equation

We must scale our read values (0 to 1023) to suitable write values (0 to 255).

The math above shows how to derive an equation that allows us to calculate a suitable write value (0-255) from a read value (0-1023) on an arduino microcontroller.