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Ask HN: Most interesting tech you built for just yourself?

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Re: Ask HN: Most interesting tech you built for just yourself?

#591

My MIL is 93, and the only tech she can really deal with is turning on the radio and TV and changing channels. She is fond of music from old classics (from the 60's and earlier), so I hooked up a Raspberry PI with an FM transmitter and created her own private radio station. She tells me what songs she likes and I create different playlists that get broadcast on her station. It preserves the surprise element of radio,…

Thanks for sharing. I aspire to such elegant projects.

Re: Ask HN: Most interesting tech you built for just yourself?

#592
As a data engineer who is looking to leave a toxic workplace behind, I built a data streaming application to surface new dataeng jobs being posted on ATSes (Applicant Tracking Systems). There is a constant stream of new JDs being posted, which fans out to a bunch of RSS/Atom feeds for combinations of skillset and location. Most startups post JDs to either greenhouse or lever, statistically speaking.

Re: Ask HN: Most interesting tech you built for just yourself?

#593
I just moved to the bay area. I made an app that scrapes all bay area events from meetup, eventbrite, and a couple of other sites- This way you end up with around 100 events a day, way too much to read through.

So next I take each event, send it to chatgpt3.5 and ask it to rate this event on around 20 parameters. Next, I take the latitude/longitude of each event and measure driving distance from my house. Then I have a master formula based on my personal interests and driving preferences and an app shows me the 10 events every day most likely to be interesting to me for any day.

Re: Ask HN: Most interesting tech you built for just yourself?

#594

Not nearly as cool as all the other stuff here, but still my favorite piece of tech for myself: IMO, Vim + Markdown is one of the best ways to take notes, brainstorm, or just explore ideas. However, I found the questions of "Where should I put the notes in my dir hierarchy?" and "How do I find the notes again?" and "How do I ensure I have my notes across all devices?" to be inhibiting. I wrote a CLI "journal" tool th…

Seems really cool. I love Vim + Markdown as well.

If you haven't heard of vimwiki yet, check it out. Right in line with what you're working on.

https://github.com/vimwiki/vimwiki

Re: Ask HN: Most interesting tech you built for just yourself?

#595

I created a todo thermal printer so that I can write messages whenever I remember something. For example when I'm lying in bed and I remember that I have to do something or reading a book and think that's a great thought that I should look more into someday. Basically I have a mobile app that I can send a message to a api. Sometimes it's just a note, sometimes it is a todo item. Then I have a raspberry pi that polls…

This sounds awesome, would love to see some pics of this. Or even a video of it in action

Re: Ask HN: Most interesting tech you built for just yourself?

#596
post #472

Oh, I think I have a good one. I had an HP-25 calculator as old as myself, and couldn't use it. The original battery pack contained two sealed NiCd cells, which obviously failed many years ago. Most people replaced their NiCd cells with new ones, then with NiMh cells, or even alkaline AA batteries. This was always problematic: newer batteries were slightly larger and never fit well. Also, the power consumption of a c…

There probably are some contract manufacturers that'll handle all that, but they'll need a decent sized minimum order.

I doubt anyone would front the money to produce 100k of them (to recover the cost of molds) unless you literally give them the design fro free.

Maybe there are smaller companies using 3D printers willing to take on a 1k sized order?

Re: Ask HN: Most interesting tech you built for just yourself?

#598

I created a todo thermal printer so that I can write messages whenever I remember something. For example when I'm lying in bed and I remember that I have to do something or reading a book and think that's a great thought that I should look more into someday. Basically I have a mobile app that I can send a message to a api. Sometimes it's just a note, sometimes it is a todo item. Then I have a raspberry pi that polls…

Love that! I want to setup a little thermal printer connected to an endpoint too. Any tips on how to do this the easiest way? are there any prebuilt solutions, or kits?

Re: Ask HN: Most interesting tech you built for just yourself?

#599

I made a "laser-beam-break" camera trigger for my Nikon D750, which I use to capture images of hummingbirds at my feeder. Instead of paying $125 for this ... ( https://www.bhphotovideo.com/c/product/1337050-REG/pluto_tri... ) I decided to build one using an Arduino. I probably spent more than $125 on the project, but I ended up buying a lot of hobbyist electronics parts, soldering gun, etc. I learned a bit about what…

The knowledge and experience you gain from those types of projects could pay for itself several times over in the future.

Reminds me of when I was getting into woodworking and my wife wanted a new coffee table.

Why would we go buy coffee table when I could build it in a month and have it cost 3 times as much?

Re: Ask HN: Most interesting tech you built for just yourself?

#600
post #254

I have a rail line right under my apartment, so I built a small computer vision app running on a Rasperry Pi which records each train passing, and tries to stitch an image of it. It has a frontend at https://trains.jo-m.ch/ . Edit: it's currently raining and the rain drops are disturbing the images a bit.

This is close to what I've always wanted to build; a camera watching the road next to me that records the speed of the vehicle traveling by. I should have everything needed from a simple camera setup, but I've not bothered actually doing it.

Since you have speed, I should dig into this.

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