... an existing rail signal, causes the error sound ("durrp-durrp") to play. The error sound is overlayed above the sound that placing ghosts usuallay plays.

Expected behaviour: No error sound, only ghosting sound is played, as ghosting rail signals over each other to swap their type is a valid action.

TL;DR
Hold randomly selected signals until they are no longer detected.

What?
Selector combinator hold random.jpg
Currently signals can be selected randomly but there is a set refresh rate. This refresh rate can result in the signal being dropped early, or the signal can be held long after it ...

Ref 126886 The new virtual icons are not visible in Description Editing.

Duplicate of 126702 New virtual signals sometimes hard to read.

Requesters send green signals.
Trains listen only to red signals.


It appears that you don't mean "green signal" or "red signal" but instead you mean using a "green wire" and a "red wire", this is because a green signal is comonly used to talk about the signal for the color green.

Train stop are ...

... into trash slots, it does not start another craft cycle.
My guess for you encountering it is due to combinator delays in circuit network, or some signals interference/leakage.

Have you experimented with your circuitry reacting to Read working signal?
For example, if it detects the machine started ...

Seems i missed them, thanks.

Issue remains though.

... input count and rare carbon asteroid input count" (the condition doesn't matter as long as it's always true, it's just to filter out these two signals), the second one set to "if uncommon carbon asteroid = 0 and rare carbon asteroid = 0, then output normal carbon asteroid input count".
Thank you ...

Is this intended?

Yes. The conditions using Each don't select the signal chosen on the right hand side, but all signals with the same value. In the screenshot that's all signals with the value 2.
You can mouse over the signals displayed near the bottom to see how they're evaluated.

I do not ...

... items with quality, any item with the correct amount will pass, even when the item type is incorrect, as long as the item count is equal.
See image for where I encountered the issue:


Issue.png

Is this intended? I do not currently know how to filter signals for specific items with a given quality.

There are quality signals in the unsorted tab. They are just not recognized by the inserters. Also see Allow combinators to generate "pure" quality signals.

It doesn't make sense to me that there is no set of "generic quality" signals in the circuit network.

I would like to be able to turn off or on generic quality filters for inserters through the circuit network.

Yes, there is "quality filter" and "quality transfer" options in the selector combinator ...

... multiply the different signal types with different factors of ten.
- Resources that uses long 8 trains multiply with one. 8-trains will trigger on signals that have the value 0>X>10
- Resources that uses long 4 trains multiply with 10. 4-trains will trigger on signals that have the value 10>X>100 ...

... to which stations.


Basically, the Requesters tell the Providers when they want some stuff. And the Providers tell the trains when they have stuff AND a Requester wants stuff.
The Communication happen by radar. Requesters send green signals.
Provider send red.
Trains listen only to red signals.

Currently they look like the "element of" symbol, which is annoying as they don't really mean that. Even when interpreting the graphic as not mathematical symbols but squiggles that suggest splitting and merging, they are still incorrect, as neither splits the input, only merges it, so they should be ...

Also see [UI] Decider combinator input signals preview minimum height .
when you add more conditions, scroll bar dissapear for good.
Whole UI design is unfortunate.
Wube has a company policy that :
- all windows are fixed size
- one information per line : which means there are three full lines on ...

Ref 126808 Combinator UI resize self and hide scroll bar.

Also see [UI] Decider combinator input signals preview minimum height.

1. Input section could resize self to one line even when RED and GREEN signals are present.
FIX : in case both colors signals are incoming keep two lines always. If number if signals overflow UI spacee, apply horizontal scrollbar.
2. Input section has no scroll bar to see all signals.
FIX : make sure it ...

I like more signals and their description. Also usage of 3 colours : dark-white - plus one color it is great style. Artistic AND readable.

However ... you know why sans-serif fonts are used in gaming, manuals and important presentations - it is readable ! Simple shapes helps brain focus at important ...