I just made a circuit consisting of a number of digital components including two microcontrollers and I will be adding a home-made radio unit to it.
I will make a few other miniature circuits which are mostly lights that connect to the main circuit through cables.
Due to space and my design limitations, I have considered eliminating some parts of my circuit to allow the battery to barely fit, but that is not possible, so now, my only option is to run two 3 foot wires just for batteries.
But in terms of everything, both analog and digital, I feel I need to add other components to make the circuit function with the battery source connected so far away.
So far, on the main circuit board where the battery connections are, I connected the connections together through a 10uF capacitor and I plan to connect another capacitor right next to the battery (so that I have a 10uF at each end of the 3 foot wire pair).
Is there anything else I should take into consideration when running power (+5VDC and ground) through long wires? These long wires will deliver power to a radio unit and the digital components and I don't want them to suddenly stop working, just because I increased the length of the power wires.
And also, what is the maximum AWG (thinnest wire) I'm allowed to use to make the circuit run efficiently?