X-Git-Url: http://pere.pagekite.me/gitweb/homepage.git/blobdiff_plain/2eb35aba7a3052a4da06bfb474b79e7e7eac169d..fe0fe16f8c3e50f6be016875c213887285ed4273:/blog/index.rss diff --git a/blog/index.rss b/blog/index.rss index 7db147d1cc..1f70ff4d71 100644 --- a/blog/index.rss +++ b/blog/index.rss @@ -6,6 +6,66 @@ http://people.skolelinux.org/pere/blog/ + + My own self balancing Lego Segway + http://people.skolelinux.org/pere/blog/My_own_self_balancing_Lego_Segway.html + http://people.skolelinux.org/pere/blog/My_own_self_balancing_Lego_Segway.html + Fri, 4 Nov 2016 10:15:00 +0100 + <p>A while back I received a Gyro sensor for the NXT +<a href="mindstorms.lego.com">Mindstorms</a> controller as a birthday +present. It had been on my wishlist for a while, because I wanted to +build a Segway like balancing lego robot. I had already built +<a href="http://www.nxtprograms.com/NXT2/segway/">a simple balancing +robot</a> with the kids, using the light/color sensor included in the +NXT kit as the balance sensor, but it was not working very well. It +could balance for a while, but was very sensitive to the light +condition in the room and the reflective properties of the surface and +would fall over after a short while. I wanted something more robust, +and had +<a href="https://www.hitechnic.com/cgi-bin/commerce.cgi?preadd=action&key=NGY1044">the +gyro sensor from HiTechnic</a> I believed would solve it on my +wishlist for some years before it suddenly showed up as a gift from my +loved ones. :)</p> + +<p>Unfortunately I have not had time to sit down and play with it +since then. But that changed some days ago, when I was searching for +lego segway information and came across a recipe from HiTechnic for +building +<a href="http://www.hitechnic.com/blog/gyro-sensor/htway/">the +HTWay</a>, a segway like balancing robot. Build instructions and +<a href="https://www.hitechnic.com/upload/786-HTWayC.nxc">source +code</a> was included, so it was just a question of putting it all +together. And thanks to the great work of many Debian developers, the +compiler needed to build the source for the NXT is already included in +Debian, so I was read to go in less than an hour. The resulting robot +do not look very impressive in its simplicity:</p> + +<p align="center"><img width="70%" src="http://people.skolelinux.org/pere/blog/images/2016-11-04-lego-htway-robot.jpeg"></p> + +<p>Because I lack the infrared sensor used to control the robot in the +design from HiTechnic, I had to comment out the last task +(taskControl). I simply placed /* and */ around it get the program +working without that sensor present. Now it balances just fine until +the battery status run low:</p> + +<p align="center"><video width="70%" controls="true"> + <source src="http://people.skolelinux.org/pere/blog/images/2016-11-04-lego-htway-balancing.ogv" type="video/ogg"> +</video></p> + +<p>Now we would like to teach it how to follow a line and take remote +control instructions using the included Bluetooth receiver in the NXT.</p> + +<p>If you, like me, love LEGO and want to make sure we find the tools +they need to work with LEGO in Debian and all our derivative +distributions like Ubuntu, check out +<a href="http://wiki.debian.org/LegoDesigners">the LEGO designers +project page</a> and join the Debian LEGO team. Personally I own a +RCX and NXT controller (no EV3), and would like to make sure the +Debian tools needed to program the systems I own work as they +should.</p> + + + Aktivitetsbånd som beskytter privatsfæren http://people.skolelinux.org/pere/blog/Aktivitetsb_nd_som_beskytter_privatsf_ren.html @@ -845,40 +905,5 @@ touch.</p> - - Vitenskapen tar som vanlig feil igjen - relativt feil - http://people.skolelinux.org/pere/blog/Vitenskapen_tar_som_vanlig_feil_igjen___relativt_feil.html - http://people.skolelinux.org/pere/blog/Vitenskapen_tar_som_vanlig_feil_igjen___relativt_feil.html - Mon, 1 Aug 2016 16:00:00 +0200 - <p>For mange år siden leste jeg en klassisk tekst som gjorde såpass -inntrykk på meg at jeg husker den fortsatt, flere år senere, og bruker -argumentene fra den stadig vekk. Teksten var «The Relativity of -Wrong» som Isaac Asimov publiserte i Skeptical Inquirer i 1989. Den -gir litt perspektiv rundt formidlingen av vitenskapelige resultater. -Jeg har hatt lyst til å kunne dele den også med folk som ikke -behersker engelsk så godt, som barn og noen av mine eldre slektninger, -og har savnet å ha den tilgjengelig på norsk. For to uker siden tok -jeg meg sammen og kontaktet Asbjørn Dyrendal i foreningen Skepsis om -de var interessert i å publisere en norsk utgave på bloggen sin, og da -han var positiv tok jeg kontakt med Skeptical Inquirer og spurte om -det var greit for dem. I løpet av noen dager fikk vi tilbakemelding -fra Barry Karr hos The Skeptical Inquirer som hadde sjekket og fått OK -fra Robyn Asimov som representerte arvingene i Asmiov-familien og gikk -igang med oversettingen.</p> - -<p>Resultatet, <a href="http://www.skepsis.no/?p=1617">«Relativt -feil»</a>, ble publisert på skepsis-bloggen for noen minutter siden. -Jeg anbefaler deg på det varmeste å lese denne teksten og dele den med -dine venner.</p> - -<p>For å håndtere oversettelsen og sikre at original og oversettelse -var i sync brukte vi git, po4a, GNU make og Transifex. Det hele -fungerte utmerket og gjorde det enkelt å dele tekstene og jobbe sammen -om finpuss på formuleringene. Hadde hosted.weblate.org latt meg -opprette nye prosjekter selv i stedet for å måtte kontakte -administratoren der, så hadde jeg brukt weblate i stedet.</p> - - -