October 2, 2022

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Hackaday Links: June 26, 2022

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Head for the hills!! We’re all doomed! At minimum that is the perception you could possibly get from the headlines about the monster Earth-struggling with sunspot this week. Though any sunspot that doubles in dimension in a make a difference of days as AR3038 has completed is worth on the lookout at, probabilities are really low that it will result in problems in this article on Earth. About the greatest this course of sunspot can regulate is an M-course photo voltaic flare, which frequently cause radio blackouts only at the poles, and may current a radiation trouble for the crew of the ISS. So no, this sunspot is most likely not going to destroy us all. But then again, this is the 2020s, and quite a lot all the things terrible seems like it’s probable.

Talking of negative outcomes, pity the very poor Sonos prospects and their ongoing struggle with the company’s odd “glitches.” For no matter what explanation, clients have been getting shipments of Sonos merchandise they hardly ever ordered, with at least a single client getting about $15,000 well worth of solutions shipped. The consumer experiences purchasing five Sonos goods, but the organization observed match to fill the purchase six moments, stuffing their apartment with goods. Sonos does not surface to be executing a lot to make it correct while featuring the client cost-free transport labels to return the items, they were being expected to schlep the offers to a UPS shop. And then there is the revenue — Sonos billed the customer for all the unordered merchandise, and will not challenge a refund until it’s all returned.

If you have ever wondered precisely what the alerts heading up and down your cable line search like, you will want to test out this video from Double A Labs. Making use of an RTL-SDR dongle and some spectrum analyzer computer software they probed the RF indicators on the cable, with some intriguing effects. The to start with 11 minutes or so of the online video are devoted to placing up the hardware and software program, even though there is some intriguing things about broadband network architecture suitable up at the get started. The scans are appealing — you can evidently see the 6-MHz quadrature amplitude modulation (QAM) electronic channels. We were being stunned to understand that these get started at just about the FM broadcast band — about 108 MHz. There had been a couple of very little surprises hiding in the spectrum, like two unmodulated analog Television carriers in one particular spot, and the point that there are in excess of 400 virtual channels jammed into 41 6-MHz QAM channels. Broadband certainly.

On a relevant observe, we obtained a tip this 7 days on an RF design and style collection on YouTube that appears to be like rather thorough. It handles the essentials, from filters and impedance matching to RF oscillators and amps. Each individual video is from 15 to 30-ish minutes prolonged, so pretty digestible, and the manufacturing high quality is excellent. You might want to check it out if you need to have to get up to speed on the Dark Arts.

And last but not least, if none of the over tickles your extravagant, or if you just truly need to have to rest, you might want to devote a half-hour to looking at an analog plotter do its issue. It arrives to us from our buddy CuriousMarc, who a short while ago fixed the traditional Hewlett Packard 7035B X-Y recorder, a wonderful 1960s design and style with some attention-grabbing features. Main amongst these is the use of photochoppers to offer with the DC offset on the enter. Marc explains it all in the initial teardown and repair videos, leaving us with practically nothing but the sluggish Cartesian dance of the pen in an (almost) never-ending Lissajous pattern. It’s quite soothing.

https://www.youtube.com/view?v=tWBqoiX3KKU

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