Long cables to LCD or ADC

AdrianJ · Joined: 16 Jan 2006 Posts: 2481 Location: Queensland

Although you are technically better to transfer digital signals over distance, in this case it probably better to transfer the analog. The LCD signal are fast and subject to cross-talk as well. The analog stuff is slow and the ADC input impedance is very high compared to the cable impedance, so you will have negligible loss. Also you only need 2 wires for the analog ( plus shield ) compared to 8 or so for the LCD.

PaulKTM · Joined: 28 Feb 2008 Posts: 20 Location: Huntsville, AL

Thanks sort of along the lines I was thinking. I'm pretty new to the AVR stuff and I always like to get the experts to help if I can. Thanks, Paul