Every #computer has built into it a device capable of generating or digitizing more-or-less-arbitrary analog signals of up to ~24kHz frequency.
It is mainly used for playing and recording sound, but I wonder what other creative uses people have found for it.
Why 56k Modems Relied On Digital Phone Lines You Didn’t Know We Had - If you came of age in the 1990s, you’ll remember the unmistakable auditory handsha... - https://hackaday.com/2025/03/06/why-56k-modems-relied-on-digital-phone-lines-you-didnt-know-we-had/ #peripheralshacks #digitalsignal0 #originalart #modulation #phoneline #featured #56kmodem #history #56kpbs #modem #pcm
Випадкове відкриття: вчені знизили енергоспоживання пам’яті PCM у 1 млрд разів https://itc.ua/ua/novini/vypadkove-vidkryttya-vcheni-znyzyly-energospozhyvannya-pam-yati-pcm-u-1-mlrd-raziv/ #Універсальнапам'ять #Оперативнапам'ять #Наукатакосмос #Накопичувачі #Технології #Пам'ять #Новини #PCM
Do people know about phase change material vests? They cool your core body temperature down because the surface of material stays the same temperature until it melts. For water, that’s 0°C. But not comfy and it takes a huge amount of energy to get water to freeze again. What if the material froze at 18°C i.e. the material will stay at 18° until it melts and will refreeze at any temp below 18°C - you can refreeze them overnight by exposing it to the cold radiation of space - making them useable without electricity (could save lives). I’m going to experiment with them this summer. #pcm #PhaseChangeMaterials #Climate
#prigozhin #prigoschin #wagner #pcm #putin #russia #meme #mamema #memes #ukraine
#slavaukraini i gerom slava!
salute to all #nafo
Introduction: Interests
Nerdy things I happen to know part one.
Thermoaccumulators, in particular - phase-changing materials. So imagine a house being heated in winter or late autumn. The temperature outside swings from hot to cold, back and forth, and it’s aither colder inside at night or the heating is more intense, thus spending more energy and money. Would it be cool to store the excess heat accumulated during the day and release it at night?
Guess what, we can do just that. A highly concentrated salt solution stores energy when it’s being molten and releases it when solidifying, thus cutting heating costs and reducing carbon emissions. A temperature at which this transition happens depends on the solution’s composition and can be tuned to suit the particular use case.
PCM usually come in a form of plastic capsules with solution inside. They are put into heat-insulators inside walls or in some cases into bricks themselves. It’s very useful technology that is already in use, but it requires a thorough research on the water-salt system properties. That just happens to be my job.
