Halloween is coming and spiders are perfect for creating a good scare. This project can be either 3D printed or made from wood. A great and challenging introduction to Arduino that demonstrates a practical use of multiple inputs and outputs.

Using a PIR sensor our target is automatically detected and our spider deployed rapidly for the perfect fright.

Build video: https://youtu.be/XWuaHZWFXcw Build doc: https://jasonwinfield.nz/sensing-spider/

No supports are required except for the spool and spider. If you are FDM printing the spider should be printed upside down.