Ideas with Redstone

Here you can see a track system operated by daylight sensors. D. I.e. the track works only during the day, so that no other players can come unnoticed at night in the base:)

Convenient activation and deactivation at will to avoid disturbing particles and noises or to prevent mobs from entering the portal unintentionally. This variant makes it very compact and unobtrusive!

A fully automatic melon or pumpkin farm

This simple redstone machine makes the dragon head added in 1.9 randomly open and close its mouth.

One slime kicks you up and 2 other slimes kick you forward. Very easy to build

In this occult sacrificial temple or altar room, the tortured souls of previously tortured and sacrificed prisoners emerge again from the depths of hellish lava to exact vengeance.

Fairy lights can be used to be strung from house to house or from spruce to spruce.

A simple piston gate. If you step on the pressure plate, the gate opens.

Slime vehicle with two cabins, TNT bombs and rear and front lamps

This fully automatic cactus farm works highly efficient, is enormously cheap, simple and completely without redstone to build. As soon as a cactus grows, the block drops due to the neighboring blocks occupied by the shields, falls into the water stream and can be collected through a funnel.