![]() ![]() There were a couple of little surprises hiding in the spectrum, like two unmodulated analog TV carriers in one spot, and the fact that there are over 400 virtual channels jammed into 41 6-MHz QAM channels. We were surprised to learn that these start at just about the FM broadcast band - about 108 MHz. ![]() The scans are interesting - you can clearly see the 6-MHz quadrature amplitude modulation (QAM) digital channels. The first 11 minutes or so of the video are devoted to setting up the hardware and software, although there is some interesting stuff about broadband network architecture right up at the start. Using an RTL-SDR dongle and some spectrum analyzer software they probed the RF signals on the cable, with some fascinating results. If you’ve ever wondered exactly what the signals going up and down your cable line look like, you’ll want to check out this video from Double A Labs. And then there’s the money - Sonos charged the customer for all the unordered goods, and won’t issue a refund till it’s all returned. Sonos doesn’t appear to be doing much to make it right while offering the customer free shipping labels to return the goods, they were expected to schlep the packages to a UPS store. The customer reports ordering five Sonos items, but the company saw fit to fill the order six times, stuffing their apartment with goods. Speaking of bad outcomes, pity the poor Sonos customers and their ongoing battle with the company’s odd “glitches.” For whatever reason, customers have been getting shipments of Sonos products they never ordered, with at least one customer getting over $15,000 worth of products shipped. But then again, this is the 2020s, and pretty much everything bad seems like it’s possible. So no, this sunspot is probably not going to kill us all. About the best this class of sunspot can manage is an M-class solar flare, which generally cause radio blackouts only at the poles, and may present a radiation problem for the crew of the ISS. While any sunspot that doubles in size within a matter of days as AR3038 has done is worth looking at, chances are pretty low that it will cause problems here on Earth. Head for the hills!! We’re all doomed! At least that’s the impression you might get from the headlines about the monster Earth-facing sunspot this week. You can read about the controversy surrounding Sonos here, and we discussed the issue on the Hackaday Podcast in episode 058.Ĭontinue reading “Sonos Speakers Free To Sing Again” → Posted in digital audio hacks, Teardown Tagged bluetooth speaker, dumpster diving, recycling, sonos We wrote about the opposite conversion last year, where old speakers from the 1960s were hacked to add Sonos capability. ![]() The resulting modified unit looks very professional, and works well as a Bluetooth speaker for the lab. This also gave him a reason to toss out the Sonos badge. It could have easily been oriented either way, but chose to install it knobs-forward. The new amplifier board is mounted in the shallow base of the speaker cabinet. He also removed the Sonos wireless interface board from the cabinet, and used an online design tool to make a simple first order Butterworth crossover network set to 2800 Hz to connect the speakers. couldn’t use the existing amplifiers, so he removed them from their power supply and re-routed the power supply to the Fosi module. It turned out the power supply section of the Sonos main board was easy to isolate. This particular model, the Fosi TB21, is almost a perfect fit for the Sonos cabinet - with only minimal Dremel tool encouragement required. The hack here involves fitting the speaker cabinet with new “guts” in the form of a wireless stereo 2×50 watt digital amplifier found online for under $30. Bluetooth Audio Amplifier Module (Fosi Audio) Not to be defeated, he hacks these speakers to make them work standalone. Despite being solidly built, discovered that even the stereo line-in jack can’t be used without registering an account with Sonos. Over at the EEVBlog, takes a second look at the Sonos Play 5 Gen 1 that he rescued from the dumpster recently. ![]()
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