![]() For controlling and measuring temperature and humidity, we use the Humidity and Temperature Sensor Demo board, which is based on the PIC18F2620 microcontroller and the SHT21 sensor from Sensirion. Inside cabinet, two little fans were installed near the top wall to provide stable air circulation. However, in case of emergency, two 40W incandescent lamps can be placed on them to replace the main heating element. These sockets are powered together with the main heating element. We have also included two sockets for incandescent lamps, to be used as backup heating elements. One, 100W silicon heating cable, approximately 8 meters long & supplied with clips on wire ends, was selected as the main heating source. In our experiments, humidity was adjusted within 60%-90% RH, using two, and separate water pans. Within the incubator cabinet, the temperature is kept at 37.6☌. Walls made from plywood and were covered inside and outside with acrylic paint. The dimension of incubator cabinet is 50×50×50cm. Our incubator was designed to incubate 42 eggs each time. The last part is the device used for automatic egg turning. The second part is the electronic equipment used to measure and control temperature and humidity. The enclosure must have good physical properties, to ensure good thermal isolation between the interior room of the incubator and the external environment. An automatic incubator turns eggs automatically, usually by slowly rocking them backward and forwards continuously.īuilding an automatic incubator consists of three main parts. Hatching eggs need to be kept at the right temperature and humidity, as well as need to be turned at regular intervals to stop the developing embryos from sticking to the inside of the shell. Tutorial on how to build an Automatic Egg Incubator by George Adamidis is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.Īn incubator is an enclosure having controlled temperature, humidity, and ventilation. With some minor modifications, the proposed automatic egg incubator can be also used for other commonly incubated poultry and game bird species. ![]() But, Please check twice the design before using it.We hope that this article will help you to build your own Egg Incubator, to incubate and brood small numbers of chicks. I fixed the problem when I discovered that, and for this version should be OK. I made a mistake in my first version of the PCB design, when I designed the PCB by choosing a wrong footprint for the MOSFETs. I don't want to put it here and make a two copy of them which might be difficult to update. The code, and the KICAD project and other PDF files with Gerber files are on my github. That is why my constants will not work for you. Depending on the box you are using for the Incubator, you get different constants. You need to make your measurements and find out the constants. You find it in the schematic and it was salvaged from an old motherboard.įor any PID controller, there are several things that affect the constants. My design keeps these constants saved in a serial EEProm. The biggest challenge in this project is to calculate the constants for the PID. Take in consideration that it will invert the signal. The opt-coupler is to protect the Arduino GPIO. So you don't burn the Mosfet.Īfter using this setup, the Mosfet is quite cold. You need to adjust the MT3608's voltage to be 24Volts before mounting it. Sure there are other ways to achieve 24Volts but, mine is depending on the MT3608 module. The simplest way to achieve that, was to use a boost converter and I had many of the MT3608. To achieve that, I needed to have 24 volts at the gate. Look at my schematic, I have a 12V supply. The output voltage of the bootstrapping wasn't enough. To achieve that for my circuit, I thought about using bootstrapping. Looking to any N-Channel Mosfet datasheet, you will find that at the top of the diagram, the RDS is the lowest when the VGS is higher. To be able to apply high current to the load which is here is the heater. The idea of this design is to let the Mosfet run in the lowest RDS-ON area, and to let the power dissipation as low as possible. The project consist of Temp sensor, LCD, Heater, Arduino which controls the components, Rotary encoder with switch, N-Mosfet and a boost converter.
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