KNUST develops wireless quiz buzzer
The College of Science, Kwame Nkrumah University of Science and Technology is preparing to host a quiz competition. The Department of Physics was tasked to come up with a system that will facilitate some aspects of the quiz competition – where multiple contestants would have to compete to be the first to answer one question. Some factors were considered before coming up with a design for this system. Some of these factors include, the device being user friendly and its being able to detect the first contestant to press. Based on these factors three different designs were proposed. The first was a wired design (where cables would be used to connect the devices together), wireless design, using Bluetooth technology and a wireless design using Wi-Fi technology. The final design that was chosen was the wireless design using Wi-Fi technology because it doesn’t require the use of cables which can be messy to set up. Another plus was that its range is superior to that of the Bluetooth technology. The range for 2.4 GHz Wi-Fi signal is about 40 m indoors and 80 m when outdoors whiles that of Bluetooth is about 10 m both indoors and outdoors. The system consists of five different devices, which are connected to one another wirelessly. Out of these 5 devices one device (called the master device) is be used to control the others. The others are the contestants devices (four in number).This number can be increased later as the master device can handle a maximum of eight (8) contestants at a time.
For more information see attached file.
Also see: https://youtu.be/FRc_8S9sCFk
