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CS Fun Activity: Handmade Radio Receivers

October 29, 2024

During the lunch break of Oct. 28, Mr. He organized an innovative and engaging activity at Zhongxin Building. The students were invited to craft their own radio receiver, as well as gain an in-depth understanding of AM/FM modulation techniques and how radios work by watching some short videos.



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In the video instruction, students learned that radio waves, the longest waves on the electromagnetic spectrum, play a crucial role in transmitting information from radio stations to receivers. However, radio waves do not carry information themselves; instead, they generate modulated signals by overlaying message signals onto carrier signals. Radios receive high-frequency signals from antennas through preset frequency bands, then demodulate (detect) them back into audio signals, which are amplified by headphones or speakers to form sound waves that audible by the human ear.


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In the process of making the radios, the students read the instructions carefully, held screwdrivers in their hands, step-by-step installed various components, and then conducted final adjustments. When melodious radio sounds emerged out of the speakers, everyone's face was filled with a sense of accomplishment and joy. In the process of assembly, they felt the charm of science, and experienced the fun of hands-on work, gaining a lot!




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The scene at present was full of vitality and enthusiasm, and the students' focused expression and earnest attitude towards learning became a beautiful scenery. This computer science fun activity aimed to encourage students to actively think and dare to be innovative in the classroom, cultivating their scientific literacy and creativity.


(Written/Pictures by Tianzhou He    Edited by Cody Turner    Reviewed by Qian Zuo)