Abstract
This paper aimed at designing and evaluating the performance of a circuit that can be used in an egg incubator, capable of controlling and monitoring of the required temperature automatically within the range of 32 to 39 C in a chamber using nonlinear sensor with possible linearization. Monitoring of temperature can be done using different types of sensors such as infrared sensors, thermal cameras, or any other alternative temperature measurement technique. This paper considers the use of thermistor due to its ruggedness and high level of sensitivity. Thermistor is a semiconductor device which senses the temperature in the chamber and the action of its output is send to a comparator which serves as a switching device in the circuit with the help of fast action of relay. The development of embryos in an incubator is highly sensitive to the environmental temperatures, studies shows that temperature manipulations around 38 C can be appropriate for hatching. The circuit consists of different stages: Power stage, stabilizing and amplifying stage, sensing and comparing stage, switching stage and loading stage respectively. All the stages work simultaneously to control the temperature in the chamber within the hatching period of 21 days with periodic turning of eggs manually. The performance evaluation and its output response show a favorable outcome as compared to standard hatching period.
Highlights
The egg incubator is an equipment designed to give eggs the necessary condition for hatching such as temperature, humidity, ventilation and sanitation for a specified period of time before hatching
The incubator is constructed in form of a box that is made up of plywood for retaining the heat generated by the bulbs inside the box and has two holes on both sides for proper ventilation
There is a water tray inside the chamber which is in the incubator for the control of humidity, and the incubator has the capacity of hatching 50 eggs, which is placed inside the chamber by means of net arrangement
Summary
The egg incubator is an equipment designed to give eggs the necessary condition for hatching such as temperature, humidity, ventilation and sanitation for a specified period of time before hatching. This paper aimed at improving the productivity of the Nation and the provision of a cheap source of protein. It is aimed at simplifying the work in the farm and at the same time increasing the output. The power-supply unit from the first stage which in employed to power the electronic circuit of the system. This stage provides the necessary DC voltage current re-
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