DC Motor A DC Motor equipped with a built-in encoder is going to immensely help us in precisely controlling the speed at which the motor rotates. Let us go through the basics behind such an encoder and how it relates to the speed ot the motor. In this tutorial, we will look at how to do speed control using a DC Motor …

I have been a happy user of the Travis CI free usage over the last couple of years. But one announcement recently made me deeply worried. Have a look here at their announcement Yes, Travis CI will no longer be free for OSS projects. There is no point in blaming Travis CI for this but rather on those idiots who abused …

Pi with Arduino Let us see how we could set up the ROS serial communication between a Raspberry Pi and an Arduino board. So, our very first integration attempt is to integrate the Raspberry Pi with Arduino. We will use the Raspberry Pi 4. Let us break this down into the following steps: ROS on the Raspberry Pi 4 Serial …

It is a good practice to write integration unit tests for your services and integrate them in your CI workflow. Such integration tests boosts the confidence of your application quality especially when it needs to be deployed in an environment where it has to talk to numerous other external services. In this regard, I …

I could not say this more than what the title says. I had a very severe blow to my already damaged left knee. First a bit of history here and here. It was on the 28th of September where I went for my first ever defensive sport training called "VingTsun". Inspired by my Physio friend who is a beginner, I …

Recently, I can say that I made very good progress playing across the neck of my guitar. I memorized few pentatonic shapes, but I was stuck the whole while on those specific boxes. The whole thing did not make any sense to me. Just wandering within those boxes is not pleasant music. Frustrated, I looked at Youtube for …

I have been using a Mac for over 7 years now, I have used about 3 Mac's where the 3rd one is still working fine. I have kids at home, they feed food to it and because of that the keys on my Mac is out of order. So it was time for me to have some privacy and get one machine for myself. Looking around the latest …

Recently I have been exploring more around the Kubernetes tooling, especially the ones that can do some pre-validation on the schema and the state of my Kubernetes deployment resources or more precisely the YAML files. I came across a few of them like conftest, kubeval etc and a wrapper around such set of tools like …

I remember my interest to play the guitar started in the year 2012 and without any hesitation, I went and purchased my first ever electric guitar, the Ibanez GSA 60 and a small Marshall amplifier. I'm not sure at that point in time if it was the right decision to start with an electric guitar but as I recollect, I …

This morning it was just a normal day as always. We always have some balloons in our hall as my younger daughter likes to play it like a volleyball with me. I also enjoy entertaining her for some time. So there were a few balloons in the hall, which I casually like to kick. As I kicked one with my right leg, my left …