Pairing your Raspberry Pi with an SPI OLED

OLEDs are interesting because they produce very crisp and brighter displays than is possible with the regular Liquid Crystal Displays. Being made of thin films of organic molecules, OLEDs use less power than conventional Light Emitting Diodes and LCDs. Driving OLEDs from your Raspberry Pi (RBPi) can be a great project to learn about these nifty solid-state displays and the processes that drive them. Adafruit offers a lovely little monochrome SPI OLED module with a resolution of 128x32, driven Read more [...]

What is a capacitor used for?

Just as a bucket holds water, a capacitor holds charge. In fact, the world's first capacitor was in the shape of a jar and was aptly named the Leyden jar. However, the latest capacitors do not look anywhere close to a jar. In its simplest form, a capacitor has two conductive plates separated by a dielectric. This helps maintain an electric charge between its plates. Depending on the type, different materials are used for the dielectric, such as plastic, paper, air, tantalum, polyester, ceramic, etc. Read more [...]

How did the diode get it’s name?

Although most diodes are made of silicon nowadays, it was not always so. Initially, there were two types – thermionic or vacuum tube and solid state or semiconductor. Both the types were developed simultaneously, but separately, in the early 1900s. Early semiconductor diodes were not as capable as their vacuum tube counterparts, which were extensively used as radio receiver detectors. Various types of these thermionic valves were in use and had different functionalities such as double-diode triodes, Read more [...]

Make a time clock with the Raspberry Pi

People working on projects are usually required to keep their time records up to date. However, those who are more engrossed with the technicalities of their work, find that they slip on their time keeping chores. If you fall into that category, let your Raspberry Pi (RBPi) help you out. Along with the tiny single board computer, you will additionally need one RGB LED, an OLED character display and a rotary encoder. Your time will be logged directly into a Google Docs spreadsheet. The purpose-built Read more [...]

A new 32 HD motor for rough operations

Maxon Precision Motors, Inc. based in Fall River, MA, has successfully designed a new 32 HD motor for rough and abusive operations. Known as the EC-4pole 32 HD motor with part number 397798, the motor is considered ideal for operating in conditions existing in deep drilling. Exploration in gas and oil fields is known by the name “downhole drilling” and according to deep drilling technology, it is possible to recover oil and gas even from depths of 2500 meters or more. This 32 HD motor is being Read more [...]

Learn about metal film resistors

Resistors are a common passive item in any electronic assembly. They are used for restricting the amount of current flowing in a circuit; acting much as a valve does in a water pipeline. The most commonly in use are carbon, thick metal and thin metal film resistors. The film forms the resistive material of the resistor. The axial resistor is usually a cylindrical conductive film on a non-conductive ceramic carrier. Two leads projecting from both ends of the resistance help in connecting the item Read more [...]

How to solder like a pro

Manual soldering is a skill that gets better with practice. For those who are starting out for the first time, manual soldering can be risky, unless they take proper care and follow safety instructions. Manual soldering involves application of heat locally by a soldering iron, whose tip may reach temperatures as high as 400°C. Soldering materials are sometimes toxic, especially if using lead based solders. Some very useful information about soldering can be found here. One of the best tips to Read more [...]

A live translation project using Raspberry Pi

Up until now, wearable computing has been confined to some odd bulky wristwatches. Most people are probably aware of the Augmented Reality Glasses, commonly referred to as Google Glass that Google has been working on for quite a while. Google Glass is still in limited release and not available to everyone. So, in the meantime, you can use your Raspberry Pi (RBPi) to fill in the gap. The project has everything you desire – small in size, light in weight and light in power consumption; a cheap lithium-ion Read more [...]

Viewing experience redefined for industrial LED displays

LED displays have been on the rise as the latest method for promoting business in all fields. Primeview, US, has taken a big step in this direction through their ECO LINE LED displays. The most interesting part of this development is that it has brought about improvement in a number of features apart from providing all round viewing of 24x7 without a break. ECO LINE LED offers seamless viewing with a 55” super-narrow gap video wall display, with only 3.6 mm thickness from bezel to bezel. This is Read more [...]

REX – a brain for robots

Not to be confused with Tyrannosaurus the king of beasts, REX is a complete development platform for sophisticated robotic applications. While most robotic designers use the Arduino platform as a base for their robots, Mike Lewis and Kartik Tiwari were not impressed with the available hardware. Their design, REX, is specifically targeted towards robots. REX poses no wiring hassles, has built-in battery inputs and has a robot programming environment that it boots up directly into. The duo felt Read more [...]