Bi-directional participant counter in conference hall / Nafiza Mohd Yazzit

There is a constant need in today’s world for appliances that are automatic. With the rise in living standard and new norm that must be follow, there is an urgent need for circuit to be built that will transforming the complexity of life into simplicity. This Bi-Directional Participant Counter in Conference Hall is designed and presented in order to count the participant of the conference hall. The counter is a reliable circuit that takes over the task of controlling the number of participants and beeps a warning alarm when the number of participants exceed the capacity limit. The total number of participants will be displayed in the LCD outside of the room. The circuit also included with an interface using Blynk app that will give access to admin to set the limit number of participants can enter conference hall. Arduino Uno is used for detecting and entry or exit action and do the addition and subtraction of the participant. It receives signal from sensor, and this signal is operated under the control of embedded programming code which stored in ROM of the microcontroller.