u/LordMcFly

I find this most useful and thought others might too. Blueprint in comments. This does several things:

- top left display tells me how many hours I have left before all patches of this resource dry up

- top right display tells me how many mining outposts are currently full and ready to load a full train

-each line of lamp indicates the remaining resource of a specific ore patch (from zero to 7 million but these numbers can be easily adjusted)

How it works:

- each of my mining outpost send 3 signals: the remaining resources, the remaining resources translated into a unique letter and a color specific to that resource that is sent whenever the loading chests are full (blue for all iron patches, red for copper, etc. for simplicity, this signal is the same that is transmitted to the train station as train limit instead of L)
- top left arithmetic combinator divides total raw resources by my hourly consumption and outputs the result to the 2 display panels

- top right arithmetic combinator simply outputs how many color signals are received for this resource, corresponding to the number of mining outposts fully loaded

- then each line lights up according to how much ore remains

It's simple: it monitors the total number of each item and the percentage at which the stock is full (the lower display panels can only display up to 950k but the lamps and percentage have no limit). Blueprint in comment.

How to use:

1 - the blue wire from the electric pole brings the reading of all chests to monitor (can include different items)

2 - set the total number of chests available for a specific item on the constant combinator on the left

3 - set the desired item on the first arithmetic combinator of each line (iron plates in the picture)

4 - profit (optional: adjust the color with the constant combinator near the lamps)