Many people have watched our chicken incubator video and asked specific questions on our you tube site about how to wire the incubator to include the thermostat, computer fan, and light bulb. Please watch. This incubator has worked great for us. We started our flock with this video. Our neighbor gave us fertilized eggs and we built the incubator out of items around the house. We did have to purchase the thermostat. We bought it from Lowes in the water heater section. We put 11 eggs in and 8 hatched. That's a great result for our DIY Incubator. Keep watching for more videos.