See attached images. I am proud that I was able to build this tool to make a chest-minecart pause while it gets loaded from a hopper, and when the hopper is emptied, the powered rail beneath it powers again and the minecart travels off. This construction is working perfectly. I admit I learned most of it from a video and slightly rearranged it.
The basic function is: When there is nothing in the hopper, then the various blocks cause the powered rail to have power. But if there is something in the hopper, then the various blocks cause the powered rail to lose power, so the minecart stops. It works great.
But, my problem is that I don't understand the logical sequence that makes each of the parts work in sequence!
Can a redstone genius out there please:
Look at the two attached images (one of the rail receiving power because the hopper has no items in it, and one where the rail is not getting power because the hopper has items)
Clearly explain the logical chain of events that makes it work. For example:
- The hopper has something in it, so it causes a redstone charge to come out of it into the block next to it.
- The redstone comparator then causes XXXX... this makes the YYYY...