Miftakul Amin, M, M Azel Aji Nugratama, Andino Maseleno, Miftachul Huda, and Kamarul Azmi Jasmi. “Design of Cigarette Disposal Blower and Automatic Freshner Using Mq-5 Sensor Based on Atmega 8535 Microcontroller”. International Journal of Engineering & Technology 7, no. 3 (June 23, 2018): 1108–1113. Accessed May 2, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/11917.