I am having problems with my yoke and throttle , they just go crazy when i powerer up ,i used ALPHA linear pots (b100k) ,they are connected to the MUx. they however work fine when connected directly to the Atmega. i added the pull-up resistor(10k) as suggested but still the same problem. My cable length unfortunately is 90cm from pots to multiplexer. i have even added filter caps(0.1uf) to the pots but still. Any other recommendations ?