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We've researched IR sensor modules that can be purchased on Amazon for about 60 yen each, so we'd like to introduce them to you! What is an IR sensor? How do you use it? As we researched, we discovered some amazing performance, so we'd like to introduce it to you! IR infrared sensor module, pack of 10, for 599 yen (as of 4/22/2022) https://amzn.to/3OjQFPL 60 yen each! Still as cheap as ever! Pin header, male and female, 40 pins, pack of 10, for 465 yen (as of 4/22/2022) https://amzn.to/3PHmYJD Previous videos featured in the video Amazingly low price! Voice recording/playback module ISD1820 • Incredibly low price! Introducing the voice recording/playback module ISD1820! This is useful! Super cheap infrared sensor HC-SR501 • This is useful! Super cheap infrared sensor HC-SR501