The materials required to construct an incubator would be a small Styrofoam cooler, a 15 to 25 watt light bulb, an electric cord with a light socket on the end of it, some nylon mesh door screen, a thermometer, something to read humidity and a little glue.
To construct the incubator for hatching quail eggs, you will have to make a small circular hole in the center of the cooler lid. Cover any excess opening with tape. That will take care of your heat.
Then I would measure about 3 to 4 inches up from the bottom of the cooler, whatever it would take to give the pan of water you will be using on the bottom of the cooler to provide humidity for the quail eggs to hatch. You will have to measure this distance up from the bottom all the way around, draw a line as straight as possible and cut the bottom off. Note: once you have the bottom cut off, you will have to cut down and across the bottom providing a big enough area to slide your water pan in. After that piece has been cut right, then put it back in place and tape the 2 sides and the bottom. Now your ready to glue your mesh netting on.
Glue the netting to the upper side of your cut, this way it won’t interfere with the cut out for your pan. You do not want this to be extremely tight, it needs to sag to provide a low end when placing the eggs in. Now you want to glue the cooler back together avoiding getting glue on you pan door. You can always run a piece of tape across the door seam on the top also. By now everything should be dry and you incubator is almost complete. The final touches are to poke 2 holes all the way through each side and the front and back. This will provide ventilation. These holes will also act as a way to control humidity. You can also add a small fan in the bottom for circulation.
You are now ready to test the incubator. Put a thermometer on the netting a pan of water in under the netting with something to read humidity. Then just plug in the light. Give it a few hours and check your readings. Your temperature should be at about 99.5 to 99.75 degrees and humidity at 60 percent. This will take some time and patience to achieve.
The only way to adjust the heat by changing the wattage of the bulb. The humidity will be adjusted by covering or uncovering the holes that you placed in the side and also by the amount of water added.
This will be good practice to learn how to make adjustments to the incubator. It will change when actual quail eggs are in it.