In order to reduce the spread of the corona virus in office areas, malls or housing, a sterilizer chamber is installed . It is used to detect someone who will enter an area and he must be sterilized first by spraying the entire body with disinfectant liquid automatically. By combining the sterilizer chamber tool with IoT technology, the sterilizer chamber tool can be monitored continuously at a certain distance using a sensor as a d etec to r which will provide information to one of the operators of the tool conditio n , about the remaining liquid, the number of people who have been sterilized. The system works by providing information on the liquid spray time of about 5 seconds and information on the liquid level in the tube from level 5-70. The average output pin voltage is 4.89 V when the sensor detects an obstacle in front of the sensor and the NODEMCU will receive a voltage 4.89 V from the output pin and ultrasonic sensor HC-SR04. The highest voltage reaches 673.2 Mv, when the distance to the object is 40 cm with the lowest voltage is 100.3 mV with the closest distance being 5 cm.

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Cotton candy is one of Indonesia's traditional foods which was quite popular in its time. Cotton candy is made from sugar that is given food coloring, cotton candy is made using a special tool that rotates and produces refined sugar fibers. Most cotton candy consists of air cotton candy feels sweet and sticky. Even though it looks like wool yarn ... The design of this cotton candy maker uses an arduino uno microcontroller, equipped with a temperature sensor, 3 push buttons and a heating stove as a heating container for the sugar container design of this tool. All Arduino Uno microcontroller working systems have been programmed using the C program language on the Arduino Uno microcontroller. Using a dose of 1/2 spoonful sugar, the average initial temperature (54.5 ° C) and the average final temperature (64.8 ° C) were obtained. Measuring one (1) spoonful of sugar, the initial heating temperature with an average (68.8oC) average final temperature (74.2oC). The dose of sugar 1 1/2 spoon, the initial temperature of the heater with an average (70.4 ° C) the average temperature of the final heater (77.4). This tool takes time to heat the heating stove in approximately 2 minutes to reach ambient temperature (54oC). Testing to find out the exact time of each dose of sugar. as in the dose of half a sugar (1/2) a spoon an average of about 120 seconds is obtained, a dose of sugar (one) spoon is obtained an average time of about 150 seconds and in a sugar one and a half (1½) spoon an average time is obtained about 180 seconds. ABSTRAK:Permen kapas adalah salah satu makanan tradisional khas Indonesia yang cukup populer pada masanya. Permen kapas dibuat dari gula yang diberi pewarna makanan, permen kapas dibuat menggunakan sebuah alat khusus yang berputar  dan menghasilkan serat – serat gula yang halus. Sebagian besar permen kapas terdiri dari udara permen kapas terasa manis dan lengket. Meskipun terlihat seperti benang wol..Perancangan pembuat permen kapas ini menggunakan mikrokontroler arduino uno, dilengkapi sensor suhu, 3 buah push button  dan kompor pemanas sebagai pemanas wadah penampung gula perancangan alat ini. Semua sistem kerja mikrokontroller arduino uno  sudah diprogram menggunakan bahasa program C  pada mikrokontroler Arduino Uno.Menggunakan takaran gula 1/2 sendok, didapatkan suhu awal rata-rata (54,5oC) dan suhu akhir rata-rata (64,8oC).  Takaran gula satu (1) sendok, suhu awal pemanas dengan rata-rata (68,8oC) suhu akhir rata-rata (74,2oC). Takaran gula 1 1/2 sendok, suhu awal pemanas dengan rata-rata (70,4oC) suhu akhir pemanas rata-rata (77,4). Alat ini membutuhkan waktu untuk memanaskan kompor pemanas dalam waktu kurang lebih 2 menit  untuk mencapai suhu sekitar (54oC). Pengujian untuk mengetahui waktu yang tepat dari setiap takaran gula. seperti pada takaran gula  setengah (1/2) sendok diperoleh rata-rata waktu sekitar120 detik, takaran gula  satu (1) sendok diperoleh rata-rata waktu sekitar150 detik dan pada takarang gula satu setengah (1 ½) sendok diperoleh rata-rata waktusekitar 180 detik.

A visual guidance display is a module that was created to assist the pilot task when parking his plane or helping to control aircraft parking at the airport. Up to now, the pilot task is still assisted by a parking attendant (Marshaller) whose aim is to guide the movement of the aircraft to the parking lot. So, a practicum module was made as a medium of learning and knowledge along with the use of alternative technology. This module uses a Visual Guidance Display (automatic aircraft parking aid). This module design uses 3 32x8 pixel dot matrix display boards with dimensions of 13x3.5 cm which are combined into one to form an appropriate combination to produce a parking direction display. The display used is a super right led dot matrix. The controller is an ESP32 microcontroller and a series of shift registers to display the right, left, straight, and stop motion views as well as the distance display of the aircraft to the parking stop point on the apron.