Build Digital Controller using PC

Digital Controller using PC
Do you have old Personal Computer junk in your stock room?
You can use personal computer to controlled the incubator.

It is very expensive to buy incubator with digital controller, using electronics controlled or computerized controlled incubators. If you have old computer that you never used it but it is in running condition you can use that computer to control the system that manipulate the temperature of the incubator. The Temperature System, Humidity System, Cooling System, and Turning System those system will consider to perfectly controlled the have a better machine hatchability. The circuit is very simple but a lot of knowledge in electronics and computer programming using Visual Basic. Printer Port Programming will be consider to, control the devices like relay using PC and that relay will activate the device connected in the terminal. Like for example the normally open of the relay is connected to the one line of heater and the common terminal is connected to the supply current. If the relay activated by the Printer Port using the program the relay will turning on the contact by normally open to close state therefore the currnt will flow and the heater will turning on.