Well as the Halloween is coming close I thought why not show you how to make an interactive electronic Halloween prop. All we need is a PIR sensor, an Arduino/ ATMega8 board and couple of other electronic components to make this Haunted Post box. In this project, a scary element pops out of the post box as soon as the PIR sensor senses a human nearby the door step. It stays out for a while and again goes back into the post-box and stays there till the next victim comes close. The scary element is of your choice. It can be a plastic skull or a monster mask or a toy hand or anything which scares people when they see it suddenly. Be creative! And use your own imagination. Continue reading to find out how the project is assembled and how it works.