16×2 Character LCD & Arduino. You can find numerous “16×2 Character LCD and Arduino microcontroller” projects everywhere in this website. ... 16×2 Character LCD – Contrast Control. As noted, contrast ...

I see the pot on that board (LCD contrast level) and I recognize the desire to keep pins open for other functions. In my U/I projects I’ve been using one PWM pin to supply the contrast.

Normally driving an LCD requires seven connections to pins on the display, but by using a shift register, [Phillip Warner] at Arduino Playground was able to drive an LCD using only 3 wires. The met… ...

To link a standard 16×2 LCD directly with the microcontroller, for instance Arduino, you would need atleast 6 I/O pins to talk to the LCD. However, if you use an LCD module with I2C interface, you ...