Hi everyone, I hope I'm posting this in the right place... I have an Arduino Uno R3 and made a web controlled relay system using an Arduino ethernet shield and SainSmart 8 channel relay. It all works fine, but I also purchased a 20x4 LCD display that I would like to use (this one -> http://www.amaz…

Using LCD with multiple shields...no pins left

system November 15, 2012, 2:13am 2

What are my options?

Use a shift register. You can operate a char-lcd with 3 pins using a hc164, or 3/4 using a hc595.

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