Ideas with Redstone

A fully automated house in the mountain.

The circuit can shorten the signal duration of switches, levers etc.. The circuit does not need a piston (the piston that can be seen is not absolutely necessary) and is easy to rebuild. Application is e.g. to be able to process the signal from the daylight sensor.

A medium sized pool with lava lighting and stairs.

As soon as there is only max 64 coal left in the oven, a light starts flashing and you know that you should refill.

A working airplane based on slime blocks.

A simple clock with a block of slime.

An assembly line that isn't much use, but looks great in a factory.

A purely decorative oil drill.

When you step on one of the pressure plates, you get shot with an arrow from below.

The principle works with a bug: If a block is in front of a caster, it is penetrated by e.g. an arrow. This way an opponent can be attacked unnoticed, e.g. in a prepared canyon.