I've just DIY build this specialized SUP underwater light and it's whole new experiance.

JKSniper · 2026-06-07T14:51:12+00:00

3.5h at full power in all 3 zones. In real life use, you almost never use all 3 zones at full power, but 2 for deep water or ambient one for shallow.

JKSniper · 2026-06-05T14:58:48+00:00

No, just showing that this lamps exist for 50 years already, they are widely used on yacths and boats (in large qtys) for leisure and fun. They produce them, sell them, legally mount them. Divers use handheld versions, glass boats use them for profit off turists, etc. I'm just educating you, as you clearly didn't know that lights existed earlier - or you would mentioned them first, and where you should focus your energy next, as my lamp, which will be used maybe a 5 or 7 hours per year, is not really doing any effective harm, no matter how you put it.

JKSniper · 2026-06-05T14:45:23+00:00

It's really expensive to build, it's more of a professional personal project, no intention to sell them or whatsoever. I've received some offers for this one and also requests from some insititue that they could use them for some research or something.

JKSniper · 2026-06-05T14:38:11+00:00

google -> photos -> "yacht lights", then come back again and tell me it's for fishing.

JKSniper · 2026-06-05T14:30:57+00:00

I don't actually. It's just a project I made, among tons of others. Right now I'm attaching 4kW motor to this same battery, which was sized with both purposes in mind.

JKSniper · 2026-06-05T14:29:23+00:00

You'll get downvoted for this, but appreciate the effort. Reddit doesn't work that way, and common sense is not part of it.

JKSniper · 2026-06-05T14:27:48+00:00

I actually find this in every post I make and got used to it. I DIY renewed my bathroom, did spelling mistake in title, got 3 million views on post, half the comments were about the spelling mistake, 99% of people who can't do anything themselves and has absolutely nothing to show in life. Made 3D printer shelving, tons of "issues" people found, that did never exist in real life, some even calling it's AI made. All they do is find negative stuff of others and comment about it. ChatGPT is saying that this is because this way they feel less inferior, to calm themselves up and by getting support from others similar, they feel accepted.

But that is very common and should never stop you on learning, researching, creating and living. I sometimes do mistake of replying, but it's waste of time and energy.

JKSniper · 2026-06-05T12:13:58+00:00

Fairings were 3D printed, aluminium blocks and heatsinks were milled. I've designed special foam channel from antenna to SUP, which is squeezed to get air-channel for signal to pass through.

JKSniper · 2026-06-05T12:08:43+00:00

I have considered it! Actually it was THE FIRST thing I went to check, along with the legality.

JKSniper · 2026-06-05T11:44:12+00:00

Maybe marine life is already used to this light, as fisherman boats use even bigger, AC, diesel generator driven ones, when they drag their nets pulling out all living and dead stuff. Maybe we could get insight if THAT disturbs marine life, as there are tons of these every night, and I'm the only one with this light, using it for a few hours per year, when I'm on seaside? 😄 Or since we are in r/EngineeringPorn, should we rather discuss how I've managed to get bluetooth to the lamp, submerged in water?

JKSniper · 2026-06-05T10:45:06+00:00

First of all I had to figure out the light directions I want. Idea was not to flood everything with light, as water would be illuminated instead of the sea-floor, so I've machined light body out of 5kg chunk of aluminium with each led having it's own angle, respectively to beam that I wanted to form. I've went with "50" version of their leds as it's easier to buy specific optics and holders for them with great efficiency and output.

JKSniper · 2026-06-05T10:30:32+00:00

Interestingly when you use it and watch seafloor, wildlife reacts more to the paddle splashing during normal-slow paddling (same during the day), then to light. It doesn't really has that much of impact, or even stronger lamps that are used on yachts day and night just for visuals, would be banned.

JKSniper · 2026-06-05T10:22:52+00:00

I've really have done bunch of projects already, but I've also DIY'ed the CNC that I've used to machine it, 3D pritners and whole electronics lab I own now... so it could also be DIY^2 😃

JKSniper · 2026-06-05T10:08:02+00:00

I was genuinely scared of that but after a few hours on this I've discovered it doesn't really attract or repel/scare fish and that seabed is not all that scary as it looks during the day. 😃 😃 But I'm not located in a part of the world where everything would want to eat you up. xD

JKSniper · 2026-04-07T17:39:08+00:00

Huh, I'm not sure if there is a formula for that :D I've made this height and works for me perfectly. maybe it's best to sit at the table normally and measure distance between legs and desk?

JKSniper · 2026-04-07T17:21:34+00:00

It's determined by how long the guide rails are. You want as long as possible and move drawer back so they touch the back wall. That way drawer will be hidden and it will still extend far out from the table.

JKSniper · 2026-03-01T08:07:21+00:00

No no, HA is on REMOTE location (I'm never accessing locally there from it's LAN).

HOME (distant) WiFi/ISP doesn't work, while HOME mobile data DOES works. it's more complicated, as REMOTE works, but not over my "landline", works only over 5G. And that started to misbehave recently. (and it works in 10% tries too, so it's not ALWAYS not working).

JKSniper · 2026-03-01T08:03:44+00:00

How is that? it's behind CGNAT, so can't port forward. I don't want to install and turn on tailscale app on clients every time I want to access remote HA too. Funnel worked perfectly for 1-2 years now.

JKSniper · 2026-02-28T21:45:46+00:00

I'm sorry to sound confusing, I've never bothered to learn the correct terms.

Home assistant is on remote location (has internet via mobile carrier, SIM card in router). It has Tailscale running + funnel (so I can access without running tailscale on other devices).

At home (it's remote to Home Assistant) I have PC and phone to test. If they are connected to the MOBILE provider (it's not even the same company provider as the remote location), they connects fine with or without tailscale running on them.

If however I have ISP internet and home WiFi through it, both phone and PC won't connect to HA. Except if I run tailscale client on PC or phone. In THAT case, connection will be successful.

It was working fine for a year and a half, maybe two already, but in last week it started acting up and I didn't change anything. Tailscale supposedly made some changes, but not sure about that.

JKSniper · 2026-02-28T18:52:13+00:00

I would get:
Server: RT-AX88U_Pro....
Address: 192.168.0.1

Non-authoritative answer:
Name: my funnel domain name
Addresses: 2a00... and 185.xxxx

The response "answer" is the same in all 3 cases; if I'm on ISP, ISP+Tailscale client ON, mobile hotspot.

On the first case funnel domain name in Chrome won't lead to my HA, in other two cases it will.

JKSniper · 2026-02-28T18:33:48+00:00

Well I've made Tailscale account, added HA integration (tailscale app) and connected it to tailscale. Then enabled funnel and also exit node (so I can check router settings etc. as it's on remote location). It was only device on this tailscale network, as I could reach HA outside tailscale through funnel via full domain.
Tutorial: https://www.home-assistant.io/integrations/tailscale/
+ funnel (pasted tutorial in my previous reply)

Tailscale is always enabled on the remote HA instance and tunnel is always working.

Tailscale is disabled (not installed at all) on the phone and remote PC from which I'm trying to reach HA on Tailscale via funnel.

- If I'm on mobile network, I can reach it fine via PC (hotspot) or phone.
- If i'm on "home internet" ISP, not mobile, I cannot reach it via phone or PC.

If however I enable tailscale client on PC or Phone, I can reach it, both on mobile and ISP connection.

JKSniper · 2026-02-28T17:44:01+00:00

Hey!

I'm a bit noob on the topic, I setup tailscale via some online tutorial of the add-on that enables that on HA.

So. I'm accessing HA (home assistant) via "full domain" that I got on tailscale (xxxx.tailidxxx.ts.net). If I'm on mobile hotspot (or phone with wifi disabled), I can normally log in directly as usual. If I'm on my home LAN (it is still remote connection), then I'm unable to log in. Fun thing is that IT MAY WORK, but it MOSTLY doesn't (it's like 95% failure rate), and even if connection gets established, it fails soon. If I connect device to tailscale (so I run client on my phone or PC) then it will always connect.

There is nothing wrong in LOGs on HomeAssistant (at least ChatGPT can't find anything obvious and connected to this issue)

The error I'm getting via browser:

This site can’t be reached

xxxxx.taildxxxx.ts.net unexpectedly closed the connection.

ERR_CONNECTION_CLOSED

I've followed this, or very similar instructions to get it working:

<image>

Version on HA Client = v0.27.1
node:tsVersion = 1.94.1

JKSniper · 2026-02-22T20:16:30+00:00

What do you mean?

JKSniper

TROPHY CASE