Umar L, Hamzah Y, Setiadi RN. MULTI-CHANNEL FRY COUNTER DESIGN USING OPTOCOUPLER SENSOR. SPEKTRA [Internet]. 2019Aug.31 [cited 2026Apr.8];4(2):97 - 104. Available from: http://103.8.12.212:33180/unj/index.php/spektra/article/view/11887