@article{Wei20221 title = "Design of Stopwatch based on STC89C52 Single Chip Microcomputer", journal = "Journal of Current Scientific Research", volume = "1", number = "4", pages = "1 - 8", year = "2022", note = "", issn = "2766-8681", doi = "https://doi.org/10.14302/issn.2766-8681.jcsr-22-4126", url = "http://oap-journals.infojcsr/article/1790", author = "Wang Wei and Sun Yongjian", keywords = "Microcomputer", keywords = "LED", keywords = "Proteus" }