Over the past two weeks, I have been working towards creating a 'stupid pet trick' using relays to control a household electronic device. I chose to use a fan as the manipulated item because fans interact with the viewer both through motion and the creation of wind. When I heard the name of the project I immediately thought of optical illusions, as for the most part, they are just a 'stupid' visual trick. I had a collection of spinning optical illusions (meant for a spinning top) and I chose the best one and put it inside the fan. It became even more silly when I added a rainbow 'wig' and stem to the fan. I am using an ultrasonic sensor to turn on the fan, and after two seconds it turns back off. A light is on the other side of the motor relay, so the light can turn back on as the fan is slowing down, which is when the illusion looks the best. Here is a photo of my stupid pet trick: Here is a video of my stupid pet trick: Here are two photos of the circuit: Here...