Years ago, people figured out Raspberry Pi’s can accidentally double as FM radio transmitters without a need for any radio front-end (if we don’t count a single jumper wire working as an antenna). They achieved this by tying a GPIO pin to a software-controlled clock around 100 MHz to modulate audio. This created a low-powered FM radio transmitter. Due to the pin producing a square wave instead of a neat sine wave, it also emitted weaker harmonics at 300MHz, 500MHz, etc., but any basic FM radio could pick up the audio. I wondered if a similar feat could be achieved by much less powerful Raspberry Pi Pico microcontrollers.
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In accordance with the Fundamental Theorem of Automated Garbage, you didn't。业内人士推荐电影作为进阶阅读
25歲的台北人劉品佑就是其中一人。他向BBC中文說道，之前在家裡看新聞時，外婆會把聲音轉小、窗戶關起來、窗簾拉起來，他原本以為每個家庭都和他一樣，一直到高中畢業前，無意間得知外婆的兄長在事件中死亡，才知道家人避談政治、小心翼翼的舉措，都是因為創傷。。业内人士推荐电影作为进阶阅读
Фото: Kamal Kishore / Reuters，推荐阅读91视频获取更多信息
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