Design and Construction of an Infrared Activated Entrance and Exit Counting Device

Abstract

This paper presents the design procedure and construction of a low powered entrance and exit counting device. It uses infrared activated transmitter and receiver. The particular circuits that have been employed have been constructed using available components. The counter is capable of counting solid objects to a maximum value of nine thousand nine hundred and ninety nine.


(Nigeria Journal of Pure and Applied Physics: 2003 2 (1): 54-58)