thunderace7
New Member
I have a 40x2 that I use for several functions, each being selected by coding 3 of the input pins of the plug-in measurement heads. Because the pull up/down resistors are housed within the plug I want to minimise them as much as I can. Although not best practice, I can't see why a single 10k resistor from +5v to 2 or 3 pins wouldn't work. Similarly, the same set up from 0v. Better still would be to leave out the pull up resistor altogether and rely on the internal resistor that I believe exists. Does all this sound ok?