Use wooden chopsticks to make an automatic hooking float. Outside the wooden chopsticks, waterproofing should be done.
Drill 1mm hole below 1 cm below the round float.
Under the wooden chopsticks, you can drill the hole at the top 3 cm.
Use a 1mm stainless steel wire.
Adhesion with super glue or epoxy.
Use a float with 10 - 15 g buoyancy.
If you want to attach the sink, please attach it.
Shows the line rigging.
The red is the main line and the yellow is the leader line.
You can adjust the sensitivity by adjusting the connecting link.
It is a completed product and shows it works.