One of the common causes of accidents is physiological factors such as drowsiness. A helmet is a device used to reduce the risk of head injury when an accident occurs while driving. Helmets placed on motorbikes often experience theft to the detriment of the helmet owner. A helmet was created to reduce the risk of an accident, warn motorists when they are drowsy, and provide a warning when a helmet is stolen. The method begins with designing devices, preparing devices, testing, repairing, and adjusting devices. The main components used are Arduino Nano and Arduino Pro Mini. The input components are a pulse sensor, MPU6050 sensor, touch switch, NRF24L01 receiver, rope clip, on/off push button, and limit switch. The output components are one channel relay, NRF24L01 transmitter, and speakers. From the results of testing the device, the helmet will be connected to the motorbike if appropriately used, the speaker will send a rest notification if the rider is drowsy, and the helmet alarm will sound loud when someone wants to steal the helmet.

In the transition from the dry season to the rainy season, betta fish breeders are particularly affected. Betta fish cubs are prone to death. Betta fish fry are betta fish children after 1 to 7 days. The feedstock of betta fish cubs, namely water fleas, is greatly reduced due to overflowing water. Unstable temperature attacks the body resistance of betta fish cubs. This study designed and made a conditioning device for the growth of betta fish fry using PLC Zelio SR3B261BD and NodeMCU ESP8266.  Features of the tool consist of making artemia feed, distributing artemia feed, telling breeders to mix feed, controlling, and monitoring the temperature of the pond water. The results of the study showed that the device can work to hatch artemia eggs, distribute artemia to fry, notify farmers via telegram to mix feed, monitor the temperature, and maintain the temperature of the pond water in the range of 24?C - 27?C. The difference with previous fish farming research, this research adds a feature of making betta fish feed through the process of hatching artemia eggs.

<p>This study aims to design and create an automation system for filling products into packaging. PLC CP1E-N30DR-A system can be controlled and monitored via Omron NB7W-TW00B HMI. HMI programming using NB-Designer software. The product used is a steel ball. The number of steel balls is set via HMI.  The HMI screen display consists of inputs: Push Button Start, Push Button Stop, input the number of products in the packaging, packaging sensor, and steel ball sensor; outputs: conveyor and counter display. The test results show that HMI could provide variations in the number of products in the packaging. The present value counter can be displayed on the HMI. The control and monitor automation system of filling the product in the packaging worked well.<em> </em> <em></em></p>

Transmission of COVID-19 occurs between humans through droplets or splashes of body fluids containing SARS-CoV-2 particles. If a COVID-19 patient does not cover his mouth and nose when coughing or sneezing, the patient will emit droplets containing the virus. Droplets can stick to the patient's hands and surrounding items. Anyone can get the virus when shaking hands or touching items that have the virus and contracting the virus if they touch their eyes, nose, or mouth without washing their hands first. In public places such as schools, offices, and hospitals, many pieces of equipment are controlled using the help/touch of a hand. The use of equipment in public places by many vulnerable people is the cause of the rapid spread of infectious diseases. The research that will be carried out is to design and manufacture tools to control equipment without touching hands to prevent the spread of infectious diseases. The controlled equipment consists of water faucets, lights, fans, and curtains. The lights, fans, and water faucets are controlled using palm movements with the max distance from the Smart IR Switch being 11 cm. If there is palm movement within the working range of the Smart Switch IR, the solenoid valve, lights and fans will change from their previous conditions. If the initial condition is 'off' it will change to 'on' or vice versa. The curtain is controlled using palm movements with the max distance to the GP2Y0A21YK0F IR sensor being 10 cm. If there is palm movement within the working range of the GP2Y0A21YK0F IR sensor then the curtain will change from its previous condition. If the initial condition of the closed curtain changes to open or vice versa.