Threads by latest replies - Page 18

No.888739 ViewReplyReportDelete
So guys
live in a third world shithole and things are starting to get hot in here, and I'm not talking about the neighbor's daughter
With the heat comes a lot of annoying things such as bugs, flies, mosquitoes and Germans to our beaches
So I decided to build myself one of those insect killers with a black light (UV, Ultraviolet they are all the same right?) and the electric grid.

So my question is, is that thing really effective (against bugs not Germans)?
Have anybody tried to build one of those?
Tips are also welcome
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DIY Soap

No.884104 ViewReplyLast 50ReportDelete
Good day, fellow /diy/ers. Months ago, a man posted his experiments in creating cold process soap from scratch. This man inspired me, and I took his suggestions and ran with it. I now own my own soap company that is slowly growing and have produced a wide variety of soaps.

I hope we can summon the original soap dude, and anyone else with an interest in soap. I will also be happy to answer questions, help you get started, give tips and tricks and maybe offer up some samples for anons in the United States. I will start the thread and see if there is any interest.
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No.891694 ViewReplyReportDelete
ROLL UP ROLL UP, STATE YOUR BUSINESS, SHARE YA WARES, EVERYONES A WINNNAAA!!!!!!!!!!

>Age
>Country
>Trade/Qualification/Journeyman
>What you currently do
>What are your future prospects?.
14 posts omitted

No.891373 ViewReplyReportDelete
How can I fix this..?
11 posts and 1 image omitted

Power electronics

No.893448 ViewReplyReportDelete
Hi guys, I have to make a project for power electronics, problem is I have no idea what to do.

I have 50 hours to make it, I gotta use OpAmps / Transistors and an AC power suply.

Can you guys help me?
2 posts omitted

Molding silicone figures

No.892939 ViewReplyReportDelete
I need to make a lot of small silicone cylinders (30-40 mm long and 0.8-10 mm thick) with a minor detail at the end. What would be the best way to do it? I was thinking with molding but don't know which material to use for the mold. Ideally, it would be one which wouldn't require coating with lubricants prior to pouring silicone in the mold. I have a feeling this would significantly extend the production time at given quantities so I wish to avoid such step (also additional cost).

Any help would be greatly appreciated.
9 posts and 1 image omitted

No.892277 ViewReplyReportDelete
Hello /diy/, I would like to build a very bright flashlight, but I got stuck deciding what the best way to go is. Basically I'm conflicted between HID and LED.

I'd rather go with HID since that produces more light, however I would need to build or modify a ballast to actually make it work. With LED it would be fairly simple electronically, but I will have to make sure the LED module doesn't overheat.

So would it be possible to build a ballast? They deliver a voltage spike to get a spark going, or did I get that completely wrong?

Would it else be possible to modify a ballast for car HID's to fit into a flashlight case?

With LED's is it really necessary to have such a big heat sink as in this video:
https://www.youtube.com/watch?v=c--5c3Egv4E
I was thinking about making my own metal case and then implementing fins into it to transfer the heat that way.

I imagined the rough dimensions would be 15-20 cm long and a diameter of 4 cm.

Would this be possible or did I get to ambitious?
1 post and 1 image omitted

Nailed it!

No.877820 ViewReplyLast 50ReportDelete
Post pictures of what you did to save your day.
151 posts and 40 images omitted

VR display from 4k monitor

No.893208 ViewReplyReportDelete
What kind of optics do I need to make a VR device from a 4k monitor? I understand it will have to be some kind of periscope because of the interocular distance?

I'm looking to do the same thing as oculus does with a mobile display but with bigger PC monitor I have.
4 posts and 3 images omitted

No.893474 ViewReplyReportDelete
Every couple weeks I have another one of these cans. Sometimes I use them to germinate seeds before planting outside, a few I use to keep odd screws and such. Height is 14 cm, diameter 8.5 cm. Volume ~ .750ml

Just for kicks I want to make a coffee mug out of one. I was thinking first thing would be to coat exposed metal since it rusts. Is there a coating that I could cover the inside with that wouldn't peel / dilute into the coffee over time? I'm guessing no, doesn't seem very healthy.

Is there a material that I could mold into the interior that isn't too thick and would hold liquid without leaking chemicals/stuff into the liquid? I'd like it to have at least half a liter capacity after lining the inside.

Pic is said object.
3 posts and 1 image omitted