I'm a real newb here, so go easy on me. I'm playing around with an LCD touchscreen (the ezLCD), and it works great. I've got a circuit attached that sends timed pulses to a triac for AC load control. My serial communication to the LCD works 100% when the AC load isn't attached, but as soon as I plug it in I get enough noise on the serial data line that about 20% of the data is misread.
It's all hooked up on a breadboard, but it's fairly neat and I do expect some noise given the setup. What approach might I take to filter out this noise from the serial input? I've been googling decoupling capacitors and RC filters, I don't really know much about either and am wondering if that is the correct route to take. I'm not sure if I should be applying the filtering to the serial line, the VCC of the LCD or the VCC of the arduino. I'm a little confused :~