Hi Liam
Sorry, I had not read through the whole thread/project and did not realise that divider is a real thing connected to an Arduino analog input. In that case the input resistance is so high it can be ignored.
I only read that post in isolation and the voltage divider bit came across as a general description. I picked up on all the bits missing which can cause headaches if not considered in the application of such a network. Sorry about that and I apologise. Will read in more detail in the future.
While on this subject though there is one thing often neglected in relation to potentiometers. Power rating. when a pot is rated as being able to dissipate say 1Watt. This means it can dissipate this power OVER THE WHOLE LENGTH of the resistive element. So if for instance you have a 1k 1W pot connected as a rheostat (variable resistor) and only are using 500Ω of it the dissipation capability becomes 0.5W. More than 1 person has come unstuck by not considering this.
Cheers Bob
