Welcome to the future with 50y old technology. There is an obscure emacs extension, swank js, that runs a nodejs daemon that speaks slime to emacs.
It allows you to work with js the same way you'd work with lisp, evaling lines or buffers into a live nodejs instance.
I use it (in combination with org-babel) to talk to live instances of remote services, to inspect data, experiment, but also as kind of an on-the-fly UI
It allows you to inject js into a browser as well, handy for js dev or even on the fly data scraping/web manipulation. Super useful yet not very well known.
klymit, pads are inexpensive, super light and surprisingly comfy
you usually make an open fire, but sometimes you need a stove? you don't want to carry something heavy or something that uses weird fuel that you can't get everywhere?
alcohol stoves are great in general, and this one in particular: vargo decagon
It was a bit slow to prime (should get to a certain temperature before it starts shooting flames from the sides) but I deal with this by just covering the whole thing with alcohol setting it on fire, primes it immediately :D
(if you get a vargo triad, you should have an alcohol bottle with about 1mm nozle, it has just a tiny hole to fill it through)
you can also always make a DIY super cat or something on the cheap, and you should use a windscreen, these can be sensitive to wind. yes putting random stuff around is fine-ish, but those aluminum foldable ones are reliable, cheap and light.
Are you having trouble falling asleep during conversations?
Are you in a disco, finding in hard to focus on computer programming?
I have a solution for you, just pop one of these babies in. http://lesh.sysphere.org/dump/weirdforest.mp3
Its a sound that I made that I play when I need to focus and zone out. It has some rain, weird thunder, owls, someone shuffling sticks around and whale noises of course.
I guess it will sound a bit ominous at first but it grows on you
I feel like people aren't freaking out enough about how awesome it is that big universities are publishing their lectures online, some of my favorite ones are
I turned these into podcasts that you can download here
about behavioral biology letures, in order to fall in love with Sapolsky, check his short talk on toxoplasmosis parasite
Also, I think his lecture on biological underpinnings of religiosity that is a part of this course is not in the playlist, I think because its pretty controversial, you can find it as an old recording here
will add more stuff to this folder with time.
10$ power bank / battery charger combo that you can use for day to day stuff but also outdoors.
Quick review of Yuneec e-go cruiser as there aren't that many of those around. I'll try to mention things I was wondering and wasn't able to find out about online. I'm also lazy, so not that many links in this text, use google.
This is a chepaest longboard of a new generation (lipo batteries, sub 10kg) with also one of the best specs.
6 kg, one of the lightest boards around, until marbel comes out and changes the playing field.
Official site claims 30km range. My experience in the real world is closer to 10km.
I'm a dumb kid, I like going fast, and top speed of this board is 20 km/h which seemed slow, but its not. Longboard is not a bicycle, small obstacles would become too dangerous at higher speeds. In order to safely achieve higher speeds in city like environments wheels would have to be at least two times bigger, and then this wouldn't be a typical longboard anymore and it wouldn't be light.
The board is not totally quiet but the noise is nothing too much, some people might even enjoy it.
I don't feel comfortable climbing up sidewalk borders higher then ~5 cm, not sure if it's the lack of experience or just not the thing you would normally do with a 6kg longboard.
Its not waterproof. It will handle some splashing but it happened a few times that I couldn't turn it off before it dried. Its easy to entirely disassemble and assemble, you even get the tool for it with the board.
Yuneec is not friendly about it. I asked. But I'm guessing the board itself would be pretty friendly. Speed could be changed in order to kill myself more easily, I'm light, I'm pretty sure it could go faster then it does, I could for example just change the transmission, or perhaps replace the firmware or the speed controler entirely. And regarding the remote controler, the board supports bluetooth connection to iphone, this could be reversed and a custom controler could be made, for example just a glove which measures how bent your fingers are.
Great, if you talk to European branch. Asian branch is slow to respond if they respond, with bad english. After a week my wheel randomly fell off, the bearing broke. These are good longboard bearings and they said they've never seen this happen before, in a few days I've received a whole new set of wheels.
I never skateboarded but got a hang of it pretty quickly regardless of my awful computer programmer leg coordination. Had it for about a month. The better I get the more fun I have, and I keep thinking how "I could be skating right now". There is like 10% of the people that go insane when they try it and they seem to be ready to sell their soul to satan to get one.
It does perfectly what it intends to do, it's called a cruiser and its a great product for fun commuting.
It turned out that I really like this technology and I'll get a Evolve carbon board which seems to be the best board I can buy right now, its heavier, with big wheels and costs as much as a car so its definetely not for everyone, but putting it out there also. Marbel board looks like an e-go killer, but its not out yet.
When buying, I've made this quick table, haven't found comparisons like this online surprisingly, so I'll share this too.
marbel 40kmh 20km 4.4kg 1299 usd
e-go 20kmh 30km 6.3kg 750 usd
bamboo 38kmh 30km 8kg 1240 usd
bamboo terrain 35kmh 15km 10kg
carbom street 38kmh 40km 8.5kg 1700 usd
carbon terrain 35kmh 25km 10.5kg 2000 usd
boosted 32-35kmh 10km 6-7kg 1300 usd
z-board pro 32kmh 20km 11kg 750 usd
Owned the board for about 4 months now. I've had a lot of hardware issues. Luckily, the support is very good. Drive wheel fell off - bearing broke, they sent me new wheels. Then, the whole board randomly died, shipped it to them, they fixed it, it randomly died again a week later in a slightly different way, shipped it again, waiting to get it back. deliveries in eu are fast (3-4 days one way) but still, the whole process takes at least 10ish days when there is an issue like this. I think 25% of the time I've owned the board, I couldn't use it.
I also met another person which owned a board for much longer then me, treats it badly, and have had 0 issues.
Initially I will use two different sensors for obstacle avoidance. lidar for closer range 2D image of space (obscale avoidance, scanning ground before landing, maybe SLAM)
and laser rangefinder for long range 1D distance sensing (looking for high buildings, maintaining altitude precisely, maybe high speed obstacle avoidance)
I went with cheapo robopeak hobby lidar, which seems to work well, here is a git repo for the library (node and beaglebone) (I also considered a lightweight hokuyo lidar) and for laser range finder I'll go with something like SF02 from paralax
these might be used in combination with some simple IR or just cameras (need more CPU but could double as optical flow sensors) used to locate becaons for landing or grabbing things
Ideally, both sensors should have an unobstructed front view on pitch dimension, with aditional unobstructed jaw dimension for LIDAR. Both sensors need to be able to independantly rotate on pitch axis for compensation of the angle of the drone when flying, and for scanning up and down (going in through windows, looking down when landing, etc) maybe rangefinder should also rotate on jaw axis on some fast servos for looking around independant of the drone orientation. not sure yet.
IR and ultrasound were also options, they are cheap but tricky and unreliable, (ultrasound behaves extra badly due to propeller noise on drones) These things can be compensated for, but laser rangefinding will always afaik give more accuracy and reliability at a price.
people often ask me why I own a drone, what is it for, and then half of the time they say that I could use it to record weddings and get some cash flowin'
If mention of recording weddings doesn't kill all my will for conversation, I'll say drones are so simple to make these days that I find it hard to justify not owning one. also, at the time there is no regulation and no one ever counts on you owning a flying robot, so its a sweet spot to own one. a drone is a flying sidekick, it can, in theory, do whatever a flying sidekick can do. it can enter through windows and steal jewlery with its tiny robot hands. Sounds ridicilous but technically it is not hard to do. In the following years we'll have to rethink space and what can be done, and before that happens, I get to be a kind of a superhero.
today, drones are very primitive. I'll fix some parts that I care about. and if I make anything useful, Im guessing drone related kickstarter projects would be welcome.
a few ideas,
few concrete things to work on, sorted by priority
this is a lot of work, but none of it is far fetched and all of this will be done soon, if not by me, then by someone else
if you care about this project, you can follow it at http://lesh.sysphere.org/tagcloud/personal_drone rss @ http://lesh.sysphere.org/tagcloud/personal_drone/rss.xml
I like creating and building things and I own a grappling hook. This site will be an partial dump of projects I work on and things I've written down.
I'm into evolvable programs, designs inspired by nature, philosophy, computer security - malware specifically, robots and such. I've worked as a software engineer and I've worked for artists on tech art pieces as that's more fun. These days I tend to travel so expect stories on hitchiking, stealth camping, urban exploration and nature.
Check out the tagcloud to find if there is something here that you care about.
First prototype in python, work in progress, I should think of more interesting project names.
I'm surprised I couldn't find this..
async object or json pattern matching/validation used for validating function/process arguments, api call permissions, messages, etc. supports serialization/deserialization of patterns themselves, which I used to implement a generic db query language on top of this. for now, tests are documentation
extras repository contains cuter things like
a bunch of selfish prisoners having sex and mutating. WHOA. a very basic evolutionary algorithm, a last night's play.
Prisoner's dilemma is a scenario in a game theory (check it out if you don't know about it) its interesting to me in part because it explains human moral intuitions through a selfish evolutionary perspective, in other words, why people are generally nice to each other.
In the iterated prisoners dilemma the game is played repeatedly thus each agent has an opportunity to learn about other agents behaviours and potentially punish noncooperation. Cooperation may then arise as an equilibrium outcome.
I didn't get tit for tat which I originaly expected, nor did I manage to get any other cooperative equilibrium. cooperation does evolve, but it doesn't last, strange, I expected that cooperative species will raise and stay dominant as I enlarge the number of interactions before a step in the evolution. (its rational to be nice if you need to stick around) need to investigate and think about this some more.
I'll post more info and code later or never. screenshot and someone with a different approach and a spacial dimension.
After looking at the rorschach test, I wanted more. supirisingly, I couldn't find any rorschach generators online, so, python, tkinter and randomwalk with random size blobs and simmetrical reflection, I thought that some tweaking or more complicated algorithm would be needed but this works great.
click on a canvas for (re)generation.
I've implemented some protocols above this, like
I use it for all kinds of things, like
and I've built a few libs on top of this
I've been hoping to write this for a while, its not a very exciting project so I've been working on this when I'm tired.
its a bit unusual, nodejs-blosxom, ~400 lines of coffescript. this is very much a work in progress, I'd advise you to use it as inspiration more then as a code you run. templates related to my own homepage are included in the repo. might move them laters.