Budiyono, B., 		Sutrisno, E., & 		Wibowo, T.
(2022).
 Design of a Falling Ball Speed Measuring Instrument in Viscosity Experiment Using Arduino UNO ATmega.
<em>BERKALA SAINSTEK, 10</em>(1), 10-16.
doi:10.19184/bst.v10i1.27315