http://localhost:8080/xmlui/handle/123456789/49 Wed, 08 Apr 2026 14:20:29 GMT 2026-04-08T14:20:29Z http://localhost:8080/xmlui/handle/123456789/1248 Design and development of plastic bottle bank vending Kairoek Choeychuen; Natpapas tienchan This research report presents a design and development of used plastic bottle seller based on internet of things (IoTs). The objective of this project is to realize importance of the world conservation by recycling the used plastic bottle via seller machine. For system working, user submits their account to the seller machine via key pad. The machine is commanded to open hole for putting bottles in tray and controller board, raspberry pi, gets bottle picture via webcam. Color-projection histogram, combined spatial and color information, was computed to classify bottle size and brand. After that the size and brand including user account will be sent to online web hosting to record point. The collection of point can be show on web page and can be change to products or services in category such as coke, a bottle of drinking water, snake, donation to temple etc. For future work, we can improve mechanic of bottle conveyer to increase speed of the machine seller and also improve money transfer system via online banking. Mon, 01 Jan 2018 00:00:00 GMT http://localhost:8080/xmlui/handle/123456789/1248 2018-01-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/1242 RFID Tag Antenna Design on Curved Surface for Industrial Product Pitchanun Wongsiritron; Tajchai Pumpoung This research presents a design and fabrication of UHF RFID tag antenna. The antenna design is based on microstrip and slot antenna. The antennas are designed for the metallic surface curve surface and non-metallic surface which are appropriated for automatic identification inventory management logistics management and industrial product with a variety of surface materials. The tag antennas are designed for NXP G2XL chip with the impedance of 15.873+j148.82 ohm considering at the center frequency with 922.5 MHz. The proposed antennas can operate covering the frequency band of 920-925 MHz along the UHF RFID Thailand standard. The simulated was done by the program using electromagnetic waveform analysis. The proposed antennas were measured to evaluate the performances. The proposed antennas can be operated on metallic surface curve surface and non-metallic surface. Mon, 01 Jan 2018 00:00:00 GMT http://localhost:8080/xmlui/handle/123456789/1242 2018-01-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/1241 Position Controller of Kinetics Rain via Intranet Adisak Khaengsarigid The research presents the position controller of kinetics rain via Intranet. The design requires the internet communication board to accept the selection form of kinetics rain from the web. The Arduino Mega 2560 microcontroller board was defined to trajectory generator and PID controller. The experiments perform to position control for three Kinetics Rain form follow as: Sine wave pattern, the supine bell and the bell inverted. By choosing a pattern from the web. The internet communication board accept the pattern and send the pattern to the microcontroller board. Which the microcontroller board performs to generate the path to control, the PID controller and sending the signal to the motor driver. The feedback signal uses a potentiometer. The results of the experiment showed that the controller can control all 3 forms. Mon, 01 Jan 2018 00:00:00 GMT http://localhost:8080/xmlui/handle/123456789/1241 2018-01-01T00:00:00Z http://localhost:8080/xmlui/handle/123456789/1240 Design and development of circular antenna for FM broadcasting radio Kunnthphong Srisathit; Pitchanun Wongsiritorn The report is a planning of create a circular antenna with in radio frequency which applies some knowledge about antenna engineering to build it for learning about the diffraction of waves and parameter in antenna. For example, reflection coefficient (S11), voltage standing wave ratio (VSWR), impedance, and radiation pattern. The test should calculate a radio frequency and the aerial were made by the CST Microwave Studio program. Then, uses stainless steel to create all of a circular aerial after calculates diameter antenna. After that, brings it to do the parameter test for compare in the CST Microwave Studio program. For the aerial testing, uses some equipment like MFJ, the Signal generator, the Spectrum analyzer, and Network analyzer to do the parameter test. In conclusion, the result of the aerial testing has the same tendency with the theory which had learned before Mon, 01 Jan 2018 00:00:00 GMT http://localhost:8080/xmlui/handle/123456789/1240 2018-01-01T00:00:00Z