title: How do I dim the backlight on an 20x4 LCD Display with the i2c connected on an arduino uno
body: <p>How to dim the backlight on an 20x4 LCD Display with the i2c connected to an Arduino uno?</p>
  
  <p>I use the <code>LiquidCrystal_I2C.h</code> library and I can turn on and of the light with
  <code>lcd.backlight();</code>
  and
  <code>lcd.noBacklight();</code></p>
  
  <p>But I don't want to turn off completely the backlight: I want to dim it.</p>