Category Archives: Guides

How are Transformers Protected in the Field?

For maintaining a power grid in continuous working order, power transformers play a critical part. As repair and/or replacement of components in a power grid typically has a long lead time, protection from faults has to limit the damage to a faulted transformer. Moreover, transformer faults need quick prevention, and certain protection features identify operating conditions that could cause a failure of the transformer. This includes over-excitation protection and temperature-based protection. Classification Read more [...]

The PiServer for the Raspberry Pi

If you were running an institution teaching computer programming to kids using Raspberry Pis (RBPis), then you would normally spend some time updating numerous RBPis with the latest Raspbian and copying over several files for the class. You can save a lot of time using the PiServer, and do away with the SD cards at the same time. The PiServer is a new piece of software tool that can easily set up a network of client RBPis connected to a single x86-based computer acting as the server. The various Read more [...]

Speakers: Sound From Any Surface

Although accustomed to thinking about speakers when we hear of sound reproduction, nature uses several methods of producing sound or amplifying it. For instance, a cricket makes a chirping sound by rubbing its hind legs against each other, while perching on a large leaf to amplify the sound it produces. A guitarist amplifies the sound from the wires by coupling it to the guitar’s wooden box. Traditionally, the size of the cone and the driver of a speaker determine the frequency and range of sound Read more [...]

Butterfly IQ – Smartphone Connected Ultrasound Scanner

Traditional ultrasound scanners are rather expensive, and rarely do people own one to use at home. However, that may be about to change, as Butterfly IQ has now obtained FDA clearance for a portable ultrasound scanner that anyone can use by connecting to their smartphones. Connecticut-based Butterfly IQ has made an innovative ultrasound scanner that uses a semiconductor chip for generating the ultrasonic signals, rather than the piezoelectric crystal transducers that traditional ultrasound machines Read more [...]

Cloud Storage and Alternatives

Ordinarily, every computer has some local memory storage capacity. Apart from the Random Access Memory or RAM, computers have either a magnetic hard disk drive (HDD) or a solid-state disk (SSD) to store programs and data even when power is shut off—RAM cannot hold information without power. The disk drive primarily stores the Operating System that runs the computer, other application programs, and the data these programs generate. Typically, such memory is limited and tied to a specific computer, Read more [...]

What is a wireless router?

Most of the electronic gadgets we use today are wireless. When they have to connect to the Internet, they do so through a device called a router, which may be a wired or a wireless one. Although wired routers were very common a few years back, wireless routers have overtaken them. Routers, as their name suggests, direct a stream of data from one point to another or to multiple points. Usually, the source of data is the transmitting tower belonging to the broadband dealer. The connection from the Read more [...]

What is Optane Memory?

Optane is a revolutionary class of memory from Intel creating a bridge between dynamic RAM and storage for delivering an intelligent and amazingly responsive computing experience. For instance, Intel claims an increase of 28% in overall system performance, 14 times faster hard drive access, and two times increase in responsiveness in everyday tasks. However, this revolution is not for everyone. It works only on the 7th generation Intel Core processor based systems that affordably maintain their Read more [...]

Why do you need a Good Grounding?

Grounding is a safety measure for electrical and electronic systems whereby the user is protected from accidentally coming in contact with electrical hazards. For instance, refrigerators at home usually stand on rubber feet, even when operating from the AC outlet. Although electricity enters the refrigerator and runs through most of the electrical components within it, it has no connection to the outer metal body. Rather, the outer metal body of the refrigerator connects independently to a green Read more [...]

Variables in Lead-Free Reflow for PCBs

Reflow ovens often show degrees of variability from profile to profile. This may depend on the distribution of components on the board, especially those that are slow heating, heat-sensitive, or of high mass. In general, reflow systems cannot generate one single reflow profile producing capable thermal results for all products. For instance, a large BGA package on the PCB may not allow more than five degrees of variation near the peak of the reflow profile curve. Therefore, even while the BGA Read more [...]

How Counterfeit Electronic Parts and Components Affect Businesses

Although counterfeiting has been an age-old industry, it is only recently that the impact of counterfeit electronic parts and components has come to be highlighted. The public is slowly gaining the awareness of the implications and risks such counterfeited electronics bring to trusting users. It is difficult for manufacturers to trace the origin of the counterfeited parts compared to the traceability present for the authentic components. It is possible these are older, but legitimate versions Read more [...]