remipch

6 ms·

1.
by remipch 6mo ago
On the subject of higher dimension mathematics, I recently discovered this video : "The most beautiful formula not enough people understand" You might find it interesting too. https://www.youtube.com/watch?v=fsLh-N
2.
by remipch 6mo ago
There is "MESSAGE IN A BOTTLE.txt". The first game here is to understand what the code does without a high-level README.
3.
by remipch 6mo ago
Thank you for sharing, I'm just starting to dig into Lua language and Love2D game engine. I will explore your game source too.
4.
by remipch 2y ago
Hi Michael, [0] is a thread reproducing what I described. In that case I would like Phind's last answer to provide me with a link to the documentation or source code of 'NormalizedLandmarkList'. I hope you find it useful. [0]
5.
by remipch 2y ago
Unfortunately, I don't remember them anymore and I regularly clear my browser cache. Maybe it's just the case you're describing but I'm pretty sure I was really looking for appropriate sources and they weren't provi
6.
by remipch 2y ago
As an occasional user, what I really liked in your previous version was that Phind always gave the list of sources. So my workflow was : - ask a question - quickly read the given answer - go to the main sources to decide if they are trustwo
7.
Articulated Robotics: building a ROS2 mobile robot(articulatedrobotics.xyz)
3 points by remipch 2y ago|1 comments
8.
by remipch 2y ago
Hi HN! I just discovered Josh Newans' projects and tutorials about mobile robotics on ROS2. I find them particularly clear and straightforward, and I think some HN people here might find them interesting as well. It can be great for be
9.
by remipch 2y ago
I don't know if it has its place here but for a minimalist static website, here is my approach: - create a simple html template using simple.css [0] - write markdown files - wrap pandoc [1] in a simple bash script to manually convert m
10.
by remipch 2y ago
What do you mean by "better"? There are several aspects to consider. Indeed the advantage of your photovoltaic solution is versatility in the face of clouds and lower mechanical costs. But the drawback is the larger panel area, hi
11.
by remipch 2y ago
> not sure where you are based in France I answered your question too quickly, I'm near Clermont-Ferrand, we have several local brewery here.
12.
by remipch 2y ago
> Taking a computer out of the loop is the best way to guarantee speed and reliability. As suggested by pjc50 in another comment [0], a passive safety would be good for this application. The main drawback being the space required to prot
13.
by remipch 2y ago
Thanks for your kind and detailed reply. > it occurs to me that your system only requires an occasional movement rather than a rapid movement for tracking purposes Right, actually the system wakes up every 10 seconds to check if the angl
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by remipch 2y ago
Yes I've seen a solar dish warmer with a satellite dish (manually adjusted). It was clever.
15.
by remipch 2y ago
With the low-cost camera used here, the small red/green/blue pattern would be indistinguishable because the whole spot is saturated. It might be possible with an expensive camera.
16.
by remipch 2y ago
Yes, this is exactly how I planned to control the temperature : add a temperature sensor in the oven and implement a simple PID in the supervisor to do so.
17.
by remipch 2y ago
Nice interactive visualizations ! Yes, it might be complicated to build.
18.
by remipch 2y ago
FYI, this is the "vacuum adjustable focus mirror" I mentioned: https://lm.solar/order/4-square-rigid-aluminum-composite-mir...
19.
by remipch 2y ago
Nice explanation, thanks
20.
by remipch 2y ago
Excellent! Do you know the mirror area used here?
21.
by remipch 2y ago
Oh yes, they do. I can be a little naive sometimes :-) I still naively think that we could make mirrors completely encased in glass to limit their degradation (pure speculation here).
22.
by remipch 2y ago
> I like your cable-drive concept by the way. Did you describe it in more details anywhere? I didn't take the time to describe the cable-bot concept in detail. I modeled almost all the mechanical parts with OpenSCAD, but I struggled
23.
by remipch 2y ago
Very interesting, do you know if there are any actual applications today?
24.
by remipch 2y ago
I wasn't aware of such systems. If I understand correctly, their main feature is that they do not focus on a focal point, but instead diffuse the light. So I'm not sure if it would be applicable to my project. I need to dig deeper
25.
by remipch 2y ago
I think it depends on the mirror area. The more mirrors, the more power. The more power, the higher the temperature will be. Anyway, tungsten melts at 3422°C, I don't know if it's feasible.
26.
by remipch 2y ago
Whaoo, super interesting, thanks for the link. Some of their projects follow the same idea of a grid of small square mirrors. However, they choose to put the mirrors on the ground (which is simpler) and move the target at the focal point (w
27.
by remipch 2y ago
A 15cm x 15cm mirror used in this project cost 1€. That's 48€/m2, I couldn't find a photovoltaic panel at that price. Add to that: - photovoltaic efficiency is about 20%, while such mirrors reflect 90% of the energy - photovo
28.
by remipch 2y ago
I have developed a simple simulator [0] to estimate the theoretical power received by the target for a given hardware configuration: - the global position on the planet - the date and time - the size and position of some background elements
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by remipch 2y ago
Yes, there are several industrial applications that use a solar concentrator to drive a turbine engine or a Stirling engine. I'm not sure it's a viable way to produce electricity on a small scale because: - high thermodynamic effi
30.
by remipch 2y ago
Good idea, thank you! However a 20cm x 20cm square spot can be better for some applications. If you want to cook something it's best to spread the heat over the entire baking sheet to ensure even cooking.

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