bremen15

Hat hier schon mal jemand eine laminar flow hood selbst gebaut?

Ich bin gerade dabei und stehe vor dem Problem, dass die Luft nicht gleichmässig aus der einströmkammer herausströmt in den Arbeitsbereich. Ich teste das mit einem Räucherstäbchen und sehe sogar rückströmungen aus dem Arbeitsbereich in die Einströmkammer. Jetzt möchte ich Lamellen zum besseren Verteilen des Luftstroms anbringen, aber bin mir nicht sicher, in welcher Anordnung das am besten ist. Ich würde gerne eine Strömungssimulation vermeiden. :-)

Ich habe Videos auf Youtube angeschaut, aber die hatten das Problem aus irgendwelchen Gründen nicht, obwohl deren Konstruktion sehr ähnlich ist wie meine.

Hat jemand TIps oder Erfahrungswerte?

Ein berührender Film mit happy ending

Once, I ran from fear
so fear controlled me.
Until I learned to hold fear like a newborn.
Listen to it, but not give in.
Honour it, but not worship it.
Fear could not stop me anymore.
I walked with courage into the storm.
I still have fear,
but it does not have me.
Once, I was ashamed of who I was.
I invited shame into my heart.
I let it burn.
It told me, “I am only trying
to protect your vulnerability”.
I thanked shame dearly,
and stepped into life anyway,
unashamed, with shame as a lover.
Once, I had great sadness
buried deep inside.
I invited it to come out and play.
I wept oceans. My tear ducts ran dry.
And I found joy right there.
Right at the core of my sorrow.
It was heartbreak that taught me how to love.
Once, I had anxiety.
A mind that wouldn’t stop.
Thoughts that wouldn’t be silent.
So I stopped trying to silence them.
And I dropped out of the mind,
and into the Earth.
Into the mud.
Where I was held strong
like a tree, unshakeable, safe.
Once, anger burned in the depths.
I called anger into the light of myself.
I felt its shocking power.
I let my heart pound and my blood boil.
Listened to it, finally.
And it screamed, “Respect yourself fiercely now!”.
“Speak your truth with passion!”.
“Say no when you mean no!”.
“Walk your path with courage!”.
“Let no one speak for you!”
Anger became an honest friend.
A truthful guide.
A beautiful wild child.
Once, loneliness cut deep.
I tried to distract and numb myself.
Ran to people and places and things.
Even pretended I was “happy”.
But soon I could not run anymore.
And I tumbled into the heart of loneliness.
And I died and was reborn
into an exquisite solitude and stillness.
That connected me to all things.
So I was not lonely, but alone with All Life.
My heart One with all other hearts.
Once, I ran from difficult feelings.
Now, they are my advisors, confidants, friends,
and they all have a home in me,
and they all belong and have dignity.
I am sensitive, soft, fragile,
my arms wrapped around all my inner children.
And in my sensitivity, power.
In my fragility, an unshakeable Presence.
In the depths of my wounds,
in what I had named “darkness”,
I found a blazing Light
that guides me now in battle.
I became a warrior
when I turned towards myself.
And started listening.
– Jeff Foster

Kern-Kraft scheint nicht besonders geeignet. Ich fand es witzig aber es ist wichtiger dass Leute verstehen was abgeht.

Moin, schön dass du da bist. Hast du Fragen? Bist du schön länger an deinen Themen oder möchtest du herausfinden, wo du anfangen kannst? Hast du eine Erfolgsgeschichte zu teilen?

Auf feddit.de gab es eine. Ich bin für Empfehlungen dankbar.

Ich habe versucht mit der DKB app im Supermarkt zu bezahlen. Das hat erstmal nicht geklappt. Dann habe ich die beigefügt URL und die App studiert, ohne zu verstehen was ich falsch gemacht habe oder was ich anders machen soll. Tatsächlich hätte ich gerne eine konkrete Anleitung, wie ich die App bedienen soll und Schritte zum Debugging wenn es nicht klappt.

Könnt ihr mir vielleicht helfen?

I have an unrooted GrapheneOS phone. I was surprised that it doesn’t offer a native option to limit battery charging to a specific upper limit (e.g., 80%) to preserve battery health and prolong the battery's life.

To work around this, I decided to implement a charging limit feature using automation software and a Wi-Fi-controllable plug. After some research, I bought a Shelly Plug S for this purpose. I'm trying to keep things open-source, so I avoid Google Play apps when possible. The closest Tasker alternative I found on F-Droid is Easer. Unfortunately, Easer seems to lack some crucial features that would make this process easier, such as switching Wi-Fi networks or starting external apps.

Here’s my plan so far:

• My phone’s charger is plugged into the Shelly Plug S, which is connected to my Wi-Fi network.
• I want to use Easer to automate the process: It would turn on the plug when the charger is connected, monitor the battery level, and, once it reaches 80%, turn off the Shelly Plug S by making an HTTP call to its local web interface (or an API call).
• I prefer to block the Shelly Plug from accessing the Internet entirely (to avoid leaking data to the cloud) by setting up firewall rules that restrict its access to only my local network.

However, Easer seems to have some limitations that make this more challenging than expected:

• Easer cannot switch Wi-Fi networks: I was hoping to use the Shelly Plug’s local access point (AP mode) for a more portable solution, but since Easer doesn’t have permission to switch networks, I'm restricted to my home network.
• Easer cannot start external apps: It also can’t trigger external apps that might help with network switching or more advanced controls.

At the moment, I’m stuck with these limitations and was wondering if anyone has experience with similar setups or has already written code to implement something like this. Specifically:

Has anyone written or seen code to automate switching off a Shelly Plug once a certain battery level is reached? Are there any workarounds for Easer’s limitations, or should I consider switching to a different automation tool that fits my FOSS preference?

I would greatly appreciate any tips, code snippets, or discussions around best practices for this type of setup. Ideally, I'd love to make this work while keeping the setup local and portable, but I’m open to suggestions!

Thanks in advance for your help!

Currently in the US elections are featured in my YouTube feed, and not factual content but rage inducing.

How can I filter that?

I work in research (uni) and am writing a framework for heat processes to optimize their costs. This goes both for private houses and industrial processes. The goal is to enable industry players to see that/when renewable energies and heat reuse with heat pumps are cheaper than fossil fuels. I do this using digital twins for components and on a system level.

My boss hesitates because he thinks this must already exist. I want to pursue that path with my research, so any insights there are welcome, too, but this is primarily about the open-source project.

I searched GitHub and came up empty, but that is only a subset of the search. Do you have any idea how I can find this, one way or another? It would also be great if I could show that it likely does not exist.