![]() Sensors (LM35 & DHT11) are connected to A1 and D13 respectively. We used this to prevent Arduino to be damaged due to overvoltage. After that, we used a voltage regulator LM7812 to power Arduino. The power supply for this project is made with a 12V/3000mA Transformer (TR1), Bridge diode (BR1), and Capacitor C1. We also have a buzzer as an audio alarming system and to tune the temperature, we used a variable resistor. And ULN2003A is used as the relay driver. Relays are used to control lamps and cooling fans and turning motors. You can see that the control circuit is a very simple one. Here is the block diagram of our Arduino-based egg incubator: A smart Battery charger circuit design guide. ![]() Solar Charge Controller circuit & working principle of ON/OFF charge controller.Capacitor Power Supply parts calculator.How to design a voltage stabilizer using a micro-controller from A to Z.How to remove noise/garbage from the HD44780 LCD display.Digital Clock using a PIC microcontroller & RTC DS1307.Digital Clock with PIC16F676 & Seven Segment Display.Digital Clock with DS3231 & PIC microcontroller.Top 5 Digital Multimeters for beginners.Top 5 handheld oscilloscopes you can try.Voltage Stabilizer Circuit with 4 Relays.Simple Component Detector using PIC16F877A.Simple voltage protector for your appliances.Read ThingSpeak Channel using ESP8266 and Arduino.Not Enough ROM/RAM error with micro-controllers.Interfacing External EEPROM with PIC microcontroller.Connect to Raspberry Pi from your Laptop/Desktop using VNC Viewer.We need to turn the eggs from -45′ to +45′ from the middle in 30~45minutes intervals. Here there is a bi-directional turning motor that helps the tray to turn and the interesting thing is this motor is rated 220V AC. I had this tray in stock so I used it for this project but it’s your choice. A positioning like this will be enough to maintain proper air circulation. This will maintain good air circulation as well as it will reduce concentrated heat build-up. These circulating fans should be positioned inside in a circular way. ![]() Two or Four fans will be good for our incubator. We can use the cooling fan as our circulating fan. This gas build-up reduces chicken production. Yes, hatching eggs need Oxygen like we breathe but not in high volume. We need to heat the eggs but we must have to maintain little airflow inside from outside to supply some Oxygen to the eggs. There may have a question if we use the fan in the outside to inside way then where the inside air will go? Yes, we should not make the incubator airtight. Positioning this way do these two job at the same time. The benefits of using in this way are, that we need to cool the inside air temperature but we also need to reduce the CO2 level of the inside air. This cooling fan should be positioned in the outside to the inside way. If you want to use more lamps in series, it will be less intensity of light but the heat will be more spread. To reduce the light intensity, we can use lamps in series which will draw the same 100Watts and will generate the same heat but the heat will be more spread than using the single lamp. A 100Watt lamp for this purpose will be enough. In the big incubator, large heater elements are used but for our small one, we will use simple incandescent lamps as our heater.
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