Reliable valve meters

[Unlikus]

When you have used one of the meters you probably experienced that they are extremely unreliable.
There purpose should be that they let a specific amount go through whenever they receive a signal. This should not depend on the length of the signal.

Just reset the meter whenever the input signal switches from red to green.

In the current state it is nearly impossible to get precise amounts, because the meter will keep resetting as long it gets a green signal.

With the change it would be absolutely unambitious when and how often the meter should reset.

[yoakenashi]

Using a filter and an XOR will also resolve this issue. The filter would be set to a small number like 0.1 or 0.2 so the downstream XOR output is only active for that amount of time when the input signal goes green, and then goes red if the input stays green. It is a simple rising edge detector.

[Unlikus]

This does not work reliable in my experiments. There is a fundamental problem that the meter does not behave predictable with respect to the length of the input pulse.