The special effects in a haunted house need to be well timed. The best way to do this is to use sensors to detect where your guests are in the haunted house. So I am doing a series of projects that demonstrate a variety of sensors that you can use to automate your haunted house. Last week I showed how to make a simple DIY pressure plate switch.
This week, I am going to show you how to make a proximity sensor and how you can implement it to activate special effects.
Step 1: Materials
33 ohm Resistor
10 kohm Resistor
Black Heat Shrink Tubing (the same diameter as the phototransistor)