Category Archives: Guides

GrovePi Kits for the Raspberry Pi

If you are looking to interface sensors to the Raspberry Pi (RBPi), the popular single board computer, GrovePi+ from Dexter Industries (SEED Studios) makes it very easy with their starter kit. The kit carries a GrovePi+ board, including more than 10 carefully selected sensors along with the necessary interfacing cables. The kit is very easy to use, as the user only has to plug the GrovePi+ board over your RBPi, and connect the necessary sensor to the board. GrovePi provides a powerful platform for Read more [...]

Magnetic Sheets Prevent Noise from Spreading

Electrical or magnetic noise is a byproduct of electrical activity within an operating device, and it causes several types of nuisance. A device generating a strong electrical or magnetic interference (EMI) can influence a nearby device, making it malfunction or even prevent it from operating at all. The extent to which a device affects another with its electrical or magnetic fields is called its Electromagnetic Compatibility, while the extent to which a device is susceptible to external electrical Read more [...]

Tree-Axis High Resolution Digital Accelerometer

Most modern smartphones can sense whether their users are holding them in the portrait or in the landscape position, accordingly adjusting the displayed image. Additionally, while playing games such as Temple Run, the smartphone can respond to tilting by changing certain functions in the game. The smartphone accomplishes this motion sensing as it has an accelerometer IC working inside it. Apart from smartphones, several other applications make use of accelerometers. For instance, car alarms can Read more [...]

Using Reed Switches as Sensors

Any ordinary electrical switch has two contacts. Push-type switches are spring loaded so that pushing a button brings them together and they spring apart on releasing the button. Rocker switches have mechanical levers that close the contacts when in one position, while in the other position they pull apart. In reed switches, the two contacts are in the shape of metal reeds, each coated with a metal that does not wear easily. The reeds are made from a ferromagnetic material, so they are easy to magnetize. Read more [...]

How to Keep Your Bearings Running Cool

Electronic gadgets rely on a host of equipment for their creaseless performance. One of them is power generating equipment—spinning generators, motors, and shafts that create and transmit power. In fact rotating machinery is the basis not only of electronic gadgets, but also of modern civilization itself. A wide variety of lubricated and self-lubricating bearings keeps these machines operating smoothly and efficiently. Heat is a major factor affecting bearings, degrading its lubrication and damaging Read more [...]

Industrializing your Raspberry Pi

You can turn your Raspberry Pi (RBPi) into a completed computer system with the minimal effort. Using a pre-assembled, cost-effective kit will not only save you a lot of time, but also speed up the installation and slash development time as well, allowing you to realize the full potential of your single board computer. This industrialization of your SBC brings huge commercial potential and encompasses a wide range of applications, including using the system for payment terminals, communication systems, Read more [...]

What are Digital Pressure Sensors?

Various industrial systems use pressurized air, water, and other fluids. They use sensors to regulate and maintain proper pressure at different points in their activities. Although many systems continue using analog pressure sensors, digital versions are fast replacing them. A few examples serve to illustrate why pressure sensors are important. Industrial icemakers need water at minimum pressure between 20 and 40 psi at the inlet—this allows the water inlet valve to function properly—although Read more [...]

Interfacing XBee Modules with the Raspberry Pi

You can use two XBee modules to exchange data between them, as they are modular, self-contained, and low-cost components using radio frequency to communicate. Most XBee modules transmit on the ling-range 900 MHz or on 2.4 GHz using their own network protocol. The primary advantage of using XBee modules is their size—nearly as large as a postage stamp. Therefore, it becomes easy to use them as sensor nodes in small projects. They consume very low power, and incorporate a special sleep mode that Read more [...]

What are Signal Generators?

While developing electronic systems, engineers test the device by stimulating it with different types of signals they expect it to encounter in the field. The piece of test equipment that engineers use for generating the various test signals is the signal generator. A signal generator may be used as a stand-alone development system or in combination with other test instruments. Depending on the requirement, signal generators may come in various forms and types, with each of them providing different Read more [...]

What are USB Controlled Synthesizers?

Almost all devices now use the popular Universal Serial Bus (USB) interface for connecting and transferring data to and from other devices. Even laboratory devices are now available with the USB as their main interface to computers. Now, users can control frequency synthesizers also through the USB interface. Although neither the performance nor the features they offer are anywhere near those that bench top instruments provide, USB controlled synthesizers have their advantages. USB controlled synthesizers, Read more [...]