2026-03-04 00:00:00:03014331110http://paper.people.com.cn/rmrb/pc/content/202603/04/content_30143311.htmlhttp://paper.people.com.cn/rmrb/pad/content/202603/04/content_30143311.html11921 以全面从严治党为根本保障
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.
，这一点在体育直播中也有详细论述
Фото: IRGC via Wana News Agency / Reuters
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