Tutorial: Arduino-controlled LCD brightness and contrast
Arduino and technology enthusiast Andy Brown has published another of his excellent tutorials. In this instalment he describes how to control both the contrast and brightness of a typical HD44780-compatible interface LCD module using pulse-width modulation. Having these parameters controlled via software allows more user-interface control and power saving for battery operated projects. Watch the following short video for some demonstration:
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When making your own Arduino projects with a character LCD - save time and move forward with the Freetronics LCD & Keypad shield which contains a bright 16x2 character LCD and five buttons that can be read from only one analog input pin: