Raj Madhuram

NXT Virtual Piano – Fail!

NXT Virtual Piano - Fail!

Well, this was my plan – to create an extremely simple virtual piano with Lego Mindstorms, just by using the ultrasonic sensor in the manner below: To play the correct frequency for the detected key, I first tried a ladder if-then-else within the Mindstorms visual programming environment, and it absolutely tanked! For every if-then-else path, … more

PlotterBot!

PlotterBot!

I wanted to create a robot that can draw something on a paper. Searching for some inspirations, I found on YouTube, a variety of very amazing and cool implementations. Yet, they all drew on a horizontal plane, and were mechanically complex. I wanted something that I could mount on my son’s easel, and draw like … more

Happy NXT Holidays!

Happy NXT Holidays!

Last weekend we walked into Fry’s to find an awesome deal for Lego Mindstorms NXT 2.0. Mindstorms is a robotics system for kids 10+ years, and it comes with 3 servo motors and 4 sensors (1 ultrasonic sensor, 1 color sensor and 2 touch sensors), and a wide variety of Lego technic pieces. I had … more

Let It Snow! v1.0 Update – Thank You!

With your support for Let It Snow! application, we were able to raise USD 750 for Myrtle! This will go a long way in supporting the educational expenses of many underprivileged kids, and also raise HIV/AIDS awareness in rural Chennai. Thank you, thank you! Also, the number of application downloads is 1042 as of today. … more