As the worlds energy resources are currently insufficient to meet human needs energy-saving and energy-efficient appliances have to be invented that are readily available and accessible to everyone. To have enough energy to meet human needs and to reduce the waste from the waste of energy resources each year to meet the demand for energy that can be produced by itself. This research presents the construction of a portable DC to AC voltage converter or “Constrution of Portable DC to AC Voltage Converter” which can be operated through a solar cell. By charging energy from the sun and storing energy at the battery. and can also bring electrical energy to use inside the pressure converter There is an inverter circuit that converts voltage from DC to AC so that AC power can be used in daily life. which has a lighting system power socket USB port and helps reduce electricity bills in the house and is convenient to carry From the experimental results of creating a portable DC to AC voltage converter it can be used in daily life and saves electricity and is also clean energy from sunlight that does not cause pollution like a generator that uses oil. be a generator

The development of accessories for the sewing system aims to 1) To design and develop accessories for sewing system 2) To reduce the time of taking off the bobbin inserting the bobbin filling the bobbin and increasing the efficiency in the continuous sewing process. 3) To study consumer satisfaction towards accessories for sewing system The sample group used in the study was a sewing worker Monster Screen Factor Company Limited amounting to 20 people. The instrument used to collect data was a questionnaire on the satisfaction of the consumer group towards accessories. for sewing system and prototype accessory kit For the sewing system the amount of 1 set was randomly distributed questionnaire. Data analysis uses percentage statistics. Arithmetic mean and standard deviation The results of the study of preliminary data showed that most of the samples were female. less than 25 years old marital status Monthly employment and has an average monthly income of less than 15000 baht from a study of consumer satisfaction with accessories As for the sewing system it was found that most of the samples had the highest level of satisfaction. Accessories for the sewing system that could reduce the threading time the most followed by the accessories for the sewing system. Continuous sewing efficiency are suitable for use It is necessary for the garment industry. Improves the working efficiency of the sewing machine. and accessories for sewing system There is a quick and easy work process. with mean 4.95 4.70 4.55 4.40 and 4.25 respectively

Nowadays artificial intelligence is being used in a growing variety of applications. Whether in public health the areas of cybersecurity agriculture finance and many others have resulted in the countrys rapid development. In spite of the leap in progress but the problem of thefts increased steadily. According to the statistics collection in 2011 there were 152228 crimes and 92.5% of the property incidents occurred. The injured person will know the cause later and tracking the villain quite difficult development of home intrusion detection devices with Line notifications as a way to proactively alert when such an event occurs. Based on the principle of artificial intelligence to help it.

Currently car theft in Thailand is one problem that affects the economy and involves transnational criminals although there are many anti-theft devices available on the market. These mechanisms include gear locking devices steering wheel locking devices clutch/brake locking systems TDS systems voice transmissions wireless door-lock remote control system and GPS car tracking devices. Of the mentioned devices the GPS tracking devices are interesting as they use the principle of connecting to the cell phone system to send on-demand the GPS location of the car to the owners phone in the case that the vehicle is stolen. However these devices are not popular in the marketplace because the service fees are quite expensive. Also the function of these devices is to send the vehicles location to the verified car owner so the protection function is activated after the vehicle is stolen and the owner is only then aware that the car has been stolen. This is different from the devices that researchers have developed. The researchers equipment for when someone tries to steal a vehicle is the system will detect the movement inside the car and send the GPS location to the car owner instantaneously. Additionally the device was developed by using LoRa technology to transmit the data giving a lower operating cost than by using a GPS tracking device as sold on the market presently.

The objective of this research is to construct a phased array device to be able to inspect all sizes of welded pipes and to study materials suitable for creating a phased array. The results obtained from testing both materials are PLA plastics carbon fiber. In order to obtain the force exerted on the material and the intensity of the force exerted on the same material it is found that the strength of the comparison between the two materials is different from the PLA plastic test. Of carbon fibers will be strong and lighter than plastic. Result from the test for Elastic In the impact and strength tests of both materials it can be used to examine pipes with a circumference of 50 centimeters to 100 centimeters and to use a 34 mm. length phased array probe with a width of 24.6 mm. 36 degrees angle and then adjust the strap as needed to reduce the steps during the use of inspection equipment.