Anet A6 LCD Display bright control
thingiverse
Modifying the LCD Display for Brightness Control via GCODE Command M355. To enable brightness control using the M355 command, a modification is required on both the display PCB and the Marlin Firmware compilation. This mod was initially developed for the Anet A6 display and my custom project (https://www.thingiverse.com/thing:2827637), but it can also be applied to the RepRapDiscount Full Graphic Smart Controller using a standard Smart Adapter. To make this work with the RepRapDiscount controller, an additional connection is necessary to any unused PWM Arduino output - specifically between pin D45 on the RAMPS and the modified LCD. For reference, a diagram of the Arduino Mega connector pins can be found here: http://reprap.org/mediawiki/images/c/ca/Arduinomega1-4connectors.png
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