I haven't seen a design for one of these before, so let me share mine! All you have to do is plant your crop and then let automation take care of the rest!
Miffed by the fact that I didn't think it was possible to detect when crops were fully grown, I had to find a way to be able to do this. Using an Observer and redstone counter, I found that you can detect each growth state of crops and then send a signal once all of them have been complete.
There are two tricks I found, and thats Observers send a verrrry short redstone pulse (2 ticks) and the redstone counter requires more (I use a pulse extender for this purpose). The pistons holding back the water flow would also benefit from a pulse extender.
The second is that you will want to start your counter with one count already started. Thats because when the water harvests the crop, it will count as a state change. You can modify this by resetting a locked repeater by breaking and replacing them.
Underneath my netherwart, I have the redstone counter. To the sides I have the pulse extenders.
There were two designs for pulse extenders. I have had good success with the stacked comparator version. I have recently made use of the hopper and comparator one and am testing.
I haven't seen a design for one of these before, so let me share mine! All you have to do is plant your crop and then let automation take care of the rest!
Miffed by the fact that I didn't think it was possible to detect when crops were fully grown, I had to find a way to be able to do this. Using an Observer and redstone counter, I found that you can detect each growth state of crops and then send a signal once all of them have been complete.
There are two tricks I found, and thats Observers send a verrrry short redstone pulse (2 ticks) and the redstone counter requires more (I use a pulse extender for this purpose). The pistons holding back the water flow would also benefit from a pulse extender.
The second is that you will want to start your counter with one count already started. Thats because when the water harvests the crop, it will count as a state change. You can modify this by resetting a locked repeater by breaking and replacing them.
Underneath my netherwart, I have the redstone counter. To the sides I have the pulse extenders.
Redstone counter:
https://www.minecraftforum.net/forums/minecraft-java-edition/redstone-discussion-and/2538740-how-do-i-make-a-redstone-pulse-counter?comment=5
There were two designs for pulse extenders. I have had good success with the stacked comparator version. I have recently made use of the hopper and comparator one and am testing.
Pulse extender:
Basic design
Dude that is actually really cool
There is a topic for this; Redstone Discussion and Mechanisms. Really awesome build though!!
I am most active on Discussion, but you'll see my messages all around the place since threads get moved a lot.