This guy has an open schematic:
replyhttps://github.com/cifertech/RF-Clown
You can use their files to make one via a pcb vendor like jlpcb or you can look for someone who has already done that:
https://www.tindie.com/products/ryanyu/rf-clown-v20-esp32-wi...
Unfortunately for me, when I hear music it's from the horrible audio of a cell phone speaker.
replyAre they? You can make one pretty easily and sew it into your backpack for added camouflage. I heard.
replyIf I am not mistaken, this type of jammer can severily affect people with pacemakers. But, as a Brazilian citizen, I can understand the feeling of being forced to listen other's people music.
replyits myth youre mistaken because that would mean all the wifi devices and normal bt devices will also stop pacemaker. only early version of pacemaker before internet would be affected modern pacemakers have protection as long as you keep a safe 6 inch distance
replyhow i even make a clunky one ? need one for a neighbor in 3rd world country with lowest civic sense.
replyi tried that esp32 that uses nRF24 but it doesnt seem to jam all the time. i heard about hackrf one dont know if its can properly do that.
You can brute-force jam the entire 80MHz range. However, it would require roughly 13dB more power compared to jamming a narrow-band signal.
replyIn theory, you could try to exploit the adaptive frequency hopping that bluetooth does, nudging it to switch to specific bands, which you will then jam; this could save on energy, but I don't know if anybody's done it.