Another experiment with the Robotis CM-900 and my Arduino ADK. This time it’s using a Pololu MinIMU-9 v2 and three Dynamixel AX-12A’s to try to keep the little teddy bear straight and facing North. Sometimes the sensors get a bit confused and the actuators follow to create interesting circle patterns. But overall it seems… Read More »
I got my Robotis Bioloid Premium Kit and at Maker Faire I got the new open source controller for it, the CM-900. I’m still waiting for some DIP headers, they seem to be out of stock all over the country and DigiKey has a rolling shipment date for my order (seems to be consistently… Read More »
Our installation runs on Solaris 11 zones with many custom built IPS packages. That all works pretty well but sometimes config files need to change depending on which version of a package is installed or even if a particular package is installed at all on that zone. To make that information available to puppet, I… Read More »
This post is about how little differences might cause huge effects in the end. Our team was building a Robot Arm for the Science Olympiad, Division C event. After telling it where the bonus box is located and giving it the start command, it was supposed to be working completely autonomous via a per-determined script… Read More »
The reason for the maglev track and the photo gates was actually to test vehicles for the Science Olympiad Division C – Maglev event. Unfortunately, in San Joaquin County, this was a closed event, so I don’t have a video of the actual run. But below is a video of the winning vehicle later in… Read More »
Earlier I wrote about my DIY photogates. They work pretty well but there is always room for improvements. So I added a little 16×2 LCD display to the Arduino setup. That way, you can use the large computer-displayed stopwatch or you can rely on the little LCD. Both work simultaneously and on the same Arduino… Read More »
Mostly for the Science Olympiad – Division C – Maglev event, but also just to learn more about Arduino in general, I tried to build a photogate setup on the cheap;-) I expect the Maglev event’s timed part to be somewhere in between two and three seconds. So even for test runs, a hand based… Read More »
OK, I knew about the Arduino platform for quite some time. But I was not sure what I would like to to do with it. But with the next Science Olympiad looming on the horizon and the need to find a cheap photo gate timing system, I had the idea of an Arduino-based system. The… Read More »
OK, today I would like to share a little patch I was toying around with in the JRuby world. First a little background. We run some Ruby on Rails application via JRuby in JavaEE web containers, either in Tomcat or in GlassFish. That’s all nice and good when everything is working. But we have some… Read More »
Ok, more things I don’t like about Apache Tomcat😉 We have a web application which wants to be installed into the root context. But that means that the normal /manager webapp would either show up in it’s `directory-space’ or we would not be able to use it at all 🙁 We have an Apache web… Read More »