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There are many ways to produce light and dispel the darkness of night.   In this class, we will go over some of the most popular means of doing so. Covering methods as diverse as light bulbs, LEDs, LED strips, and EL wire, this class provides a crash course on the subject of electric lighting.   No prior experience of electronics is necessary to get started. However, if you do have some previous experience, this class also has optional sections for advanced students which briefly covers Arduino-control.   I hope you will join me and make things that shine above…


The Laser Cutter is every maker’s dream tool. Whether you want to etch detailed graphics, cut intricate patterns, or fabricate complex 3D objects, this tool will make your life much easier. In this class, you’ll get started with a box-making web app, you’ll and then learn the basics of custom cutting and pattern etching with 2D graphics. Towards the end of the class,you’ll learn how to make CAD designs into 3D objects in Fusion 360– an awesome (and free) 3D modeling program. Whether you’ve got access to a laser cutter or not, this class will teach you everything you need…


While it may seem intimidating at first, learning electronics is fun and easy.   In the first three lessons I introduce new tools, skills and concepts. In the remainder of the class, a new electronic component is introduced in each lesson.   In addition to providing an overview of an important aspect of electronics, each lesson concludes with a project. This allows you to learn about basic electronics in a hands-on manner.   I hope you will take the time and come build a circuit with me.   Enroll to get: 11 lessons accessible anytime, anywhere Learn by doing with…

Stereolithography (SLA) Technology

Stereolithography (SLA) models offer the most accurate type of fit/form prototype for the verification of any design before committing to your chosen production route. Its high accuracy and good surface finish makes it the preferred choice for designer models, engineering verification and master patterns for silicone rubber molds.   SLA is often considered the pioneer of the additive manufacturing processes,  with the first production systems introduced in 1988 and patented by 3D systems founder Charles (Chuck) W. Hull. The SLA process utilizes a vat of liquid photopolymer resin cured by ultraviolet laser to solidify the pattern layer by layer to create or…

Additive Manufacturing – Direct Metal Laser Sintering DMLS Technology

Direct Metal Laser Sintering (DMLS) was developed jointly by Rapid Product Innovations (RPI) and EOS GmbH, starting in 1994, as the first commercial rapid prototyping method to produce metal parts in a single process. With DMLS, metal powder (20 micron diameter), free of binder or fluxing agent, is completely melted by the scanning of a high power laser beam to build the part with properties of the original material. Eliminating the polymer binder avoids the burn-off and infiltration steps, and produces a 95% dense steel part compared to roughly 70% density with Selective Laser Sintering (SLS). An additional benefit of…

What purpose does the small cylindrical module near the end of my laptop charger cable serve?

They are called ferrite beads/EMI filters/ferrite chokes and contain the semi-magnetic substance Ferrite made from iron oxide (rust) alloyed with other metals . Usually seen on power chords, laptop charging cables and other electronic devices such as  printers and medical equipment. Any conductive cable acts as an antenna – if the device produces radio frequency energy, this can be transmittedthrough the cable, which acts as an unintentional radiator. What do the beads do? They prevent the cable from sending/recieveing signals. It has the property of eliminating the broadcast signals. Essentially, it “chokes” the RFI (Radio Frequency Interfearence) transmission at that point on the cable —…

How do Wind Turbines work ?

Working of a wind turbine is illustrated in this video with the help of animation. The topic covered are blade design, use of brake, velocity sensor, yawing mechanism, blade tilting, wind turbine efficiency and Betz’s limit.    

Diesel Engine, How it works ?

Diesel engines are the most versatile IC Engines. With help of animation working of Diesel engine is elaborately explained in this video. Here the basic construction of diesel engine, its working and mechanical design aspects are covered. Starting from working of single cylinder diesel engine, working of a four cylinder engine is logically explained here.    

Petrol (Gasoline) Engine vs Diesel Engine

Have you ever wondered why there exists 2 different engines, Diesel and Petrol (Gasoline) ?. This video is aimed at giving a logical illustration of differences and advantages of diesel and petrol engines. It also answers the questions like, what if I put petrol into a diesel engine or vice versa.    

How does a Transformer work ?

This video gives a detailed animated illustration on the working of electrical Transformers. Here the basic working principle and construction of transformer, step-up transformer, step-down transformer, transformer winding and core construction are well illustrated.    

DC Motor, How it works?

The working of a DC motor is well explained in this video with the help of animation. Construction details of DC Motor, Shunt & Series motor, concept of back EMF are also explained in this video.    

Manual Transmission, How it works ?

Working of a Manual transmission is explained in an illustrative and logical manner in this video with the help of animation. Here the working of Sliding mesh and synchromesh transmissions are well illustrated. This video also explains the working of a reverse gear.    

Degrees of Freedom

The concept of DoF is well explained in this video lecture with the help of animation of mechanisms. This video covers the topic of a higher pair, lower pair and mobility equation. Degrees of freedom of 4 bar linkage, cam and follower mechanism and 5 bar linkage are worked out here.    

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