Tag Archives: tutorials

What Is An Electronic Load And Where Do You Use It?

Power supply manufacturers need to test their products dynamically. Instead of using fixed-resistor banks of different sizes, electronic loads allow them to simulate easily and quickly various power states. Using an electronic load, large ranges of power sources such as converters, inverters, UPSs and electromechanical sources such as batteries and fuel cells may be tested. For varying loads, electronic loads are easier to use and provide a much higher throughput compared to fixed-resistors. For Read more [...]

Home Protection with Raspberry Pi

Planning to go on a vacation, but afraid of who will look after your home for you? Worry not, for the mighty Raspberry Pi (RBPi) is here. Not only will RBPi look after your entire house, it will send you an email of what is happening in your home and let you see it on your mobile or on a PC. How cool is that? Most alarm systems incorporate three primary sensors. The first is a temperature sensor to detect the rise in temperature in case of a fire. The second is an intrusion detection sensor to Read more [...]

Sensing humidity using advanced technology

An approaching thunderstorm creates a very stuffy environment with oppressively heavy moisture in the air. The presence of water in the air is termed as humidity and this largely affects human comfort. The amount of water vapor influences many physical, chemical and biological processes. In industries, measuring and controlling humidity is critical since it can affect not only the health and safety of personnel, it can affect the business cost of the product as well. Sleep apnea leads to repeated Read more [...]

Digital Isolators vs Optocouplers

Industrial equipment may need to operate in a region of strong electromagnetic fields. There can be a sudden surge in the voltage applied to the equipment, which may be hazardous to the user and the gear. It is crucial that you incorporate a reliable isolation system to take of these issues. Until very recently, the optocoupler was the only practical choice in providing safety isolation for manufacturers of medical and industrial isolated systems. The arrival of digital isolator has however, changed Read more [...]

How to measure temperature with a Raspberry Pi

Looking for another project to make with a Raspberry Pi? You can use your Raspberry Pi to measure temperature. Not only at a single point, but also at maximum of 20 points simultaneously. Of course, you will need 20 individual sensors for doing that. Raspberry Pi will poll all the 20 sensors one after the other, and read the temperature from each of the sensors. If you are wondering how complicated it would be to wire up 20 sensors to the Raspberry Pi, you can relax, since you need only three Read more [...]

Energy Harvesting – How & Why

What Is Energy Harvesting - Why Is It Needed? The process of extracting small quantities of energy from one or more natural, inexhaustible sources, accumulation and storage for subsequent use at an affordable cost is called Energy Harvesting. Specially developed electronic devices that enable this task are termed Energy Harvesting Devices. The world is facing acute energy crisis and global warming, stemming from rapid depletion of the traditional sources of energy such as oil, coal, fossil Read more [...]

Do surge protectors save energy?

Most modern electronic gadgets are not meant to be switched off. Rather, they are placed in a state of suspended animation called standby. Gadgets in standby perform some basic background functions until their user recalls them for full functionality. The benefit to the user is an instant response from the unit against having to wait for it to resuscitate. However, all this comes at a price. Units in standby mode need power, however small, to keep them ticking. For those powered from a battery, Read more [...]

Protection with Surge Protectors – Why and How

If you have once had your TV, audio system and other electronic equipment destroyed by a voltage surge during a thunderstorm, you will surely know how to prevent this from happening once again. For preventing such drastic accidents, it is common to use a device called the surge protector, and to have the maximum protection, it is important to know why it is required and how it works. Most people know of a surge protector as a long strip of electrical power connectors, which power sensitive electronic Read more [...]

Is mF and mFd the same as uF? Will the real Microfarad please stand up?

For those just starting out learning about electronic components (specifically capacitors and capacitance), we know that there can be some confusion related to this topic. In short, the answer is yes -- mFd is the same as uF- which is also the same as the symbol 'µ' as seen in 'µF'. Technically 'mfd' represents 'milliFarad' while 'uF' stands for 'microFarad' which is an order of magnitude smaller. Here is where the confusion begins. Some older capacitor manufacturers used 'mF' in place Read more [...]

11 secret controls on your iPhone headphones

If you have any Apple brand device, chances are you have at least one pair of their headphones laying around. If you use them on a regular basis, here are some tips to get the most from your Apple headphones: During phone calls: 1 - Incoming calls: Tap the center button to answer a call 2 - Ignore a call: Long-press the center button to ignore the call - you should hear 2 'beeps' and you will know that the caller was successfully sent to voice mail 3 - Swapping calls: Tap the center button Read more [...]