Hey! Really not my cup of tea, but here’s a few comments:

• what are the input outputs? Are you powering 6 lasers at the same time? Why hook it up to an arduino? How are the lasers connected? What is a good representative load for your laser (probably resistive, but maybe inductive or capacitive?)
• Looking at the driving circuit, there’s something fishy about them. Having a variable Vi and static ADJ pin is not what I would have expected, nor what the datasheet suggests
• how about providing a fixed, appropriate voltage on the + terminal of your laser and have low side switching through a mosfet?
• components seem pretty basic, you could probably simulate this throught spice to get a better idea of what’s happening (you can prob do this directly in kicad). Be careful about choosing models for stuff outside the PCB like the lasers. Long cables can have significant capacitive load for example.

EDIT: I think the gist of the problem is that (1) the LM317 is powered on and off continusly, causing transients, power on delays,… (2) the adjust pin depends on the voltage on the output pin, potentially causing more resonance/weird transients. I would: stick to the suggested circuit in the datasheet of the lm317, and move the switching transistor between the lm317 and the laser.

ようこそ! It’s nice to have people from all around the world around here. I’m from Switzerland, and have had strong links with Japan as my father was an importer for Japanese paragleiders (the best ones around the nineties), and I’ve been learning it a tiny bit the last two years.むずかしです！

As for AI, I think you’ll find out that the opinions on lemmy can differ quite a lot. The genie’s out of the bottle, but it’s not yet settled what it will do, and if the outcome is going to be positive for humanity. As an engineer working partly in IT, I must agree that it’s an important tool to get to know though.

May I ask from what region you are from? Japan’s a big country!

Oh god, I never considered that .* could theoretically match ... Thanks fish for not doing that, more than likely saved my unknowing ass a couple of times

It’s not a matter of “him” personally. Permissive license allow for a work to be taken and redistributed by other entities, without enforcing them to release their changes. This creates a one way relationship that is generally detrimental to the open source ecosystem, allowing work to be stolen away from the public. That being said, choosing a license is situational, and a permissive one can be a great choice in certain instances. For that particular case, I don’t see much benefit to having a permissive licence.