Addoddorn, Chaiporn. 2022. “THE DESIGN AND CONSTRUCTION OF AUTOMATIC 3 SPEED SOLAR PANEL CLEANING MACHINE CONTROLLED BY MICROCONTROLLER”. Journal of Energy and Environment Technology of Graduate School Siam Technology College 9 (1):56-69. https://ph01.tci-thaijo.org/index.php/JEET/article/view/247534.