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Closed house chicken coop is an innovation from the development of technology in the livestock sector. In closed house chicken coops, many arrangements and adjustments to environmental conditions in the chicken coop are carried out which are expected to increase broiler chicken production. In this study, researchers created a centralized control system on 2 closed house chicken coops to make it easier for broiler chicken entrepreneurs to monitor and control the closed house chicken coops owned by the entrepreneur through one place, without having to go directly to the closed house chicken coop to monitor and control the chicken coop which of course will be quite draining time and energy. This study uses Haiwell Cloud Scada as an interface device connected to the Arduino Nano microcontroller, DHT-22 sensor as a humidity and temperature detector sensor, MQ-135 sensor as an Ammonia gas detector, water level sensor as a reader of the remaining chicken drinking water level, IR sensor as a reader of the remaining chicken food level, DC fan which has 2 functions, namely inlet and exhaust in the chicken coop. Servo motor as a silo damper controller to fill chicken food from the silo to the chicken feeder located in the chicken coop.

The aviation industry is one of the service sectors. Due to its large number of users, safety is the primary concern in this industry. To ensure this safety, routine maintenance of operating aircraft is crucial, leading to the emergence of the aircraft maintenance industry. Due to the safety factors of the workpiece, installing ladders requires a significant workforce to supervise the workpiece, namely the aircraft itself, to prevent the ladder from hitting the aircraft body, which can result in COPQ (Cost Of Poor Quality). However, the use of many workers for ladder installation is considered inefficient because the maintenance process could be expedited if these workers could be utilized to install ladders on other parts of the aircraft. Therefore, if maintenance can be completed more quickly, the aircraft can return to flight sooner, meeting the airline's flight demands. Addressing this issue, this study aims to facilitate the ladder installation and removal process, thereby reducing the potential for collisions and ensuring the ladder is positioned at the required distance. This is achieved through ultrasonic sensors mounted on the work ladder, connected to a motor via Arduino Uno. The motor will stop when the input from the ultrasonic sensor reaches the predetermined distance. Additionally, if the aircraft tail moves while the ladder is installed, the system will automatically adjust the ladder's position to maintain the necessary distance, thus minimizing losses during aircraft maintenance.    

Autoclaves are the most widely used tool for sterilization worldwide and are considered the most effective and cost-effective method for sterilizing medical equipment. The research aims to design and build an autoclave that uses an Arduino microcontroller as the brain of the system and is equipped with a temperature sensor, heater driver, heater and power supply. This autoclave will help ensure that the medical equipment used is sterile by using a working system using a 121℃ pressurized steam heat method for 15 minutes. Based on the results obtained, an Arduino nano-based autoclave device has been successfully created. By measuring each measurement point, the error value is very small, namely TP1 at a voltage of 5.1 with an error of 2%, TP2 at a voltage of 4.8 with an error of 0.4%, TP2 at a voltage of 4.8 with an error of 0, 4%, TP4 at a voltage of 225 with an error of 2%, TP5 at a temperature of 121 with an error of 0%.