Lost Wax Casting – 2

The year 2020 turned out to be a year of COVID. My flights to back home in Dec 2020 got cancelled. So spend a part of the holiday to take my art of casting a bit further. In the end, I could have a ring made out of brass. Carrying forward the experience from last …

Lost Wax Casting

In Jan 2020, right after my Ph.D. defense I set my sights on lost wax casting for jewellery. It was a great learing experience for me as it was something totally new to me. Some things I learnt, during the 3 weeks I spent doing this are: I started out by buying some plaster of …

Generating Music from Basics

In this post, I am discussing on music notes, frequencies and the science behind it. Along the way I shall live demo you what I am talking about. For the demos, I am using an arduino nano to generate PWM signals (square-wave) and a cheap buzzer speaker (Piezoelectric). It is possible to use a headphone …

A DIY Drone Remote Controller

For a simple drone flying with the remote control, you need a remote control (:P). One way is to buy a remote control. FrSky, Radiolink is a popular drone remote for the hobbyist. There are several such remote controls. The only problem is the one shown below cost almost a 100 USD. Since I am …

“Where am I” with GPS

Today I am going to talk about GPS and how you can harness its power for mobile robots. We shall see how it works in some detail and especially from a robotics point-of-view. Next, we will look at some GPS modules/ GPS ICs out there and they can be used. I have with me a …

Wireless Communication from Scratch

All we 90s kids have seen mobile phones taking over our lives. We have been taught in school that Electromagnetic waves carry our signals. In school, like most people, I too accepted that mobile phones work with electromagnetic waves, no further thought given..!! The objective of this blog post is to give a brief historical …

Controlling Drone Motors

In this blog post, we shall deal with controlling drone motors and some other hardware devices. A lot of hardware like the ESC, servo motors, piezoelectric speakers to name a few are designed such that they can be controlled with PWM (Pulse Width Modulation). The basic crux is that PWMs are square waves and the …