Addoddorn, Chaiporn. “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, no. 1 (June 23, 2022): 56–69. Accessed October 2, 2022. https://ph01.tci-thaijo.org/index.php/JEET/article/view/247534.