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Ask HN: What's the coolest physical thing you've made?

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Re: Ask HN: What's the coolest physical thing you've made?

#231
The coolest physical thing I've made?

I make small gametes, and I found someone who makes large gametes. We put them together and made mutated replicas of ourselves. The first experiment has been running over 3,500 days. The second experiment has been running almost 1,400 days, but it's currently significantly louder and more prone to violence. We're very proud of them both.

Re: Ask HN: What's the coolest physical thing you've made?

#232
Some mighty impressive posts here!

Rather more modestly - made a esp32 PWM fan controller that hooks into home assistant. Nothing wild, but it did open my eyes to the fact that I can duplicate most IoT stuff on my own terms despite being an amateur. And that in turn has takes it from "IoT - not in my house" to "yes lets do more IoT".

Re: Ask HN: What's the coolest physical thing you've made?

#234

I'll brag for a minute I created what I think is a novel painting technique that I have now made significant iterative improvement on over the last 4 or so years. I now have a large portfolio of medium-large scale paintings using this technique. https://www.instagram.com/kemendoart/ The technique is a variation of a "fresco" which is applying watercolor to fresh plaster. This is a very old method that tends to surviv…

Interesting technique. Are there some similarities to the Venetian Plaster technique? (Example: https://www.youtube.com/watch?v=UfGbryICt0A)

Re: Ask HN: What's the coolest physical thing you've made?

#236

Built a two-seat, single engine airplane. Took 6.5 years to build and I've been flying it for close to a year now. The U.S. and several other countries have fairly liberal rules allowing for home-built aircraft, so there are actually tens of thousands of home-built planes flying around today. Yes, it's built from a kit (mostly sheet aluminum and rivets, some fiberglass) but I'm OK with calling it cool.

Do you have a link to where you got the kit? And how much do you estimate you spend in total to get to fly your own plane (including getting a license). (Srry if thats rude to ask)

Sure. There are a lot of kit manufacturers out there, offering a wide range of aircraft styles and purposes from back-country to aerobatic to long-range cruise airplanes and more. Materials can include aluminum, fiberglass, wood-and-fabric, and others. The EAA[1] has a lot of information about the various kits. I went with a Vans[2] which are very popular kits with a huge volunteer support/help community online and offline. They list kit prices on their web site, but they are exclusive of engine, propeller and avionics, which can be significant. Fortunately, since it takes a looong time to build, these costs can be spread out over many years to make it manageable. I got my pilot certificate 20 years ago when it wasn't as expensive as today. Not sure how much a PPL will run you these days.

1: https://www.eaa.org/eaa/aircraft-building/kits-and-plans

2: https://www.vansaircraft.com

Re: Ask HN: What's the coolest physical thing you've made?

#237

Built a two-seat, single engine airplane. Took 6.5 years to build and I've been flying it for close to a year now. The U.S. and several other countries have fairly liberal rules allowing for home-built aircraft, so there are actually tens of thousands of home-built planes flying around today. Yes, it's built from a kit (mostly sheet aluminum and rivets, some fiberglass) but I'm OK with calling it cool.

Damn, that's well beyond just "cool"! Can you share some more details on this? It sounds fascinating

https://news.ycombinator.com/item?id=37038246

Re: Ask HN: What's the coolest physical thing you've made?

#238
I've made a bunch of cancer-causing virus as a grad student. After all the COVID lab leak stuff, it's become a story I need to preface with the fact that it was all zero-risk in terms of leaking out of the lab, and the only person at risk was myself.

The virus was specifically missing the ability to replicate, but it did have the ability to infect cells in a dish. That means it was just BSL-2 stuff. Our lab studied cancer, so we'd mostly infect them with cancer-causing things like a mutated PI3K that would fluoresce so we could track it in the cell with a microscope. If people are curious, we'd mostly work with lentivirus.

It's a dream of mind to make some of the cool sorts of mechanical things people are posting here. I have multiple drawers with arduinos and components, but so far my projects hit a wall because of my lack of skill hehe. Practice makes perfect!

Re: Ask HN: What's the coolest physical thing you've made?

#239
Hardwood desktop for a sit/stand desk frame. Made from walnut planks ranging in width from 3-6" and length of ~5ft bought via mail order. Hardest part was jointing the boards (making the edges flat/square) using a router instead of a jointer, which I don't have (yet). Probably too much waste material but you learn as you go.

The fun thing about wood projects is you can cover up mistakes pretty easily and for big mistakes just make the project smaller.

Re: Ask HN: What's the coolest physical thing you've made?

#240
A long time ago I made a needlepoint for my mother out of one of her favorite photos. I thought needlepoint was interesting because it's basically pixel art except much more laborious since each pixel requires a physical stitch. I ended up writing a program to transform the photo into a needlepoint pattern, and for a while I turned it into a website for folks wanting to generate their own patterns.

I wish I had the patience to do something like that today, but there are so many other distractions.

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