Slid out, not slided :)
What's that touchscreen in my room?
251–260 of 576 posts
Re: What's that touchscreen in my room?
#252I wonder if the previous tenant removed the fuse to stop the box broadcasting a wifi signal. In an apartment block the 2.4ghz band will already be congested!
Re: What's that touchscreen in my room?
#253Earlier quoted context omitted.
> A 3A fuse would burn out in a fraction of a second if you tried to do that. he bought it on Amazon. He has every reason to be worried that it won't burn out. Louis Rossman did a video[0] where he put 8 amps through a 2 amp fuse and left the room for quite a long time, I think it was several minutes with 8a going through a 2a fuse. [0]: https://www.youtube.com/watch?v=B90_SNNbcoU
Fuses are notoriously imprecise, even "fast blow" ones: https://www.youtube.com/watch?v=WG11rVcMOnY
I'm not going to watch the whole video but it doesn't seem like it supports the point you're trying to make.
> How long does it take for your 400mA multimeter fuse to blow at 600mA?
> The amazing unpredictability of fusing current ratings at low overloads.
It makes a point of saying that fuses are imprecise, i.e. that a fuse likely won't blow when 600mA of current passes through a 400mA fuse for a few seconds.
What Rossmann discovered was that fuses from Amazon took 4x the rated current for minutes. That's many orders of magnitude out of spec.
Re: What's that touchscreen in my room?
#254If you were to develop a device like that "properly", how would you do it? What kind of hardware and what software stack would one use?
Re: What's that touchscreen in my room?
#255Earlier quoted context omitted.
We have one as well, but since we're on a variable rate tariff(Octopus Tracker) it's completely useless - it doesn't know the current electricity/gas price, it seems to receive rate updates from the network about once every few weeks - so the numbers it displays are just wrong. I've made my own little Raspberry Pico display that queries today's energy prices and shows those, but I have not been able to show today's e…
If you use Home Assistant on the Pi there is an Octopus integration that you might find handy. It even works with the Octopus Mini https://bottlecapdave.github.io/HomeAssistant-OctopusEnergy/ Hope this is useful
Ooooooh thanks that is actually super useful - had no idea this existed! Thank you!
Re: What's that touchscreen in my room?
#256Earlier quoted context omitted.
SIM cards and secure elements (contactless credit cards) both use this, or did at one point.
For a time, Java was set to be the 'everything everywhere' language, IIRC in some quarters the hype behind Java on everything was even bigger than Cloud, then Crypto, then AI.
It kind of was, I remember my "pre-smart" Sony phones having Java games.
Re: What's that touchscreen in my room?
#257If you were to develop a device like that "properly", how would you do it? What kind of hardware and what software stack would one use?
Probably an esp32 on both ends. And an eink screen.
The tricky part is passing the networking and auth credentials from the server to the client. But you can marry them during manufacturing.
Re: What's that touchscreen in my room?
#258That was fun.
Are the csv files rotated or can they hypothetically make the device run out of space in n^n years? :)
Re: What's that touchscreen in my room?
#259>DATE & TIME ARE ALWAYS CORRECT AND NEVER NEED TO BE ADJUSTED Reads like a quote from a Philip K. Dick book.
Maybe it’s the technical writer’s way of saying “we ping an NTP server so don't worry” https://news.ycombinator.com/item?id=39065780 (Clearly that didn't pan out so well)
Without internet access?
Re: What's that touchscreen in my room?
#260A few years ago I came to the realisation that if you want people to be more environmentally conscious or economical in terms of utility consumption, (electricity, water, gas, etc), they need far better data than a single figure per month. You want to be able to see usage to a resolution of at most 5 minutes. That way people can spot things like “having my electric heater on for those couple of hours used more electr…
I’d argue that if you want people to be environmentally friendly, you need to abstract all data, dashboards , etc,
The system must just work behind the scenes and optimise energy use as much as possible automatically.