Fun! Light an LED briefly by tapping on a Piezo element used in the buzzer. Enjoy the wonder of lighting the LED by your finger tapping on the Piezo element. Piezo electricity is the natural electricity generating from Piezo ceramic material. Piezo ceramic material like Lead Ziconate Titanate has the property to generate a tiny current when its crystals are mechanically disturbed through pressure or heat. At the same time, if a voltage applied to the Piezo ceramic material, it vibrates. This property is used in Piezo buzzers to generate sound.Let us see the Fun Continue reading →
PIR Sensor Module is one of the new introductions in electronics which is a highly useful device to switch on lights when it detects a human movement. It turns on the lights from 30 seconds to 3 minutes depending on the preset adjustments. Its range can be as high as ten meters which can also be adjusted. The module gives a high output when it detects the human movement. This high output can be used to drive a relay through a switching transistor. Let us see the details of PIR sensor module. Continue reading →
Not always, but only when handled carelessly. Shock induced muscle tetany is the most important effect of current on the muscles. If a person touches the energized conductor, fore arm muscles contracts forcefully and fingers bend. So the person involuntarily holds the conductor. Therefore the victim will be unable to take the hand from the conductor.
As you know, electricity is the flow of electrons through a conductor from its source to the destination. If the conductor offers less resistance, the flow current will be fast and if the conductor has some resistance, the flow of electrons will be obstructed leading to slow movements which generate heat through friction.
Human skin is a semiconductor for electricity and current passes through the body to the ground just like the flow of current through the electric wire. This flow of current causes burning and shock. If the skin resistance is low, the chance of shock hazard is very high. Some people are more sensitive to current while others are less sensitive. Electrical safety measures are necessary while dealing with high voltage AC available from the power grid. Ignorance can lead to a fatal shock or fire hazards.
Remember, Electricity travels at the speed of light. Its flow is around 299,460 kilo meters per second so you will not get time to react because you can’t move faster than electricity. So the best way is staying out of its way. Continue reading →
Lot of confusion… Mayans calendar, Nibiru Cataclysm, Solar Flare, explanations from scientific world… Why Mayans Calendar ends in 21st December 2012. So many beliefs and arguments. What is the reason for this? The Mayan calendar is the Mesoamerican Long Count calendar that is characterized by its non repeating nature. The long count calendar identifies a day by counting the number of days passed since the Mythical creation date corresponds to August 11 BCE 3114 in the Gregorian calendar. The Maya were an ancient civilization of the now called Central America and Southern Mexico. During their heyday, the Mayans have developed some calendars to track the sacred days and also to mark the start and end of cyclical periods. They developed one calendar called Long Count and tracked the future long time periods. A group of people think that the 21st December marks the end of the existing world and rise of a new world. They link the date with Nibiru cataclysm which is the encounter between the Earth and a large planetary object. What actually signifies December 21st? Let us move from beliefs and Archeology to Astrophysics Continue reading →
I am slightly deviating at this moment because everybody in the world is now eagerly discussing about 21st December and the Mayans Calendar. What is this Calendar and what is its importance? Let us see how it works. The Mayans calendar is the Mesoamerican Long Count calendar that is characterized by its non repeating nature. The long count calendar identifies a day by counting the number of days passed since the Mythical creation date corresponds to August 11 BCE 3114 in the Gregorian calendar.Scholars of the Mayan Civilization were expert in Sky watching and they predicted the condition of Sky on Dec 21, 2012. This day will be a Winter Solstice. The Sun is going to exactly overlap with the intersect point of Ecliptic of the Milky Way and Equator.
The Maya were an ancient civilization of the now called Central America and Southern Mexico. During their heyday, the Mayans have developed some calendars to track the sacred days and also to mark the start and end of cyclical periods. They developed one calendar called Long Count and tracked the future long time periods. This calendar starts in 3114 BCE and it marked time in roughly 394 year period known as Baktuns. In one long future cycle, they marked December 21, 2012 as the end of the long cycle. The Mayans wrote that the significant 13th Baktun ends in December 21, 2012. According to Mayans calendar, the Long Count resets to 184.108.40.206.0 on 21.12.2012. Continue reading →
Electronics is emerging as a new branch called Bionics in combination with biology since there are possibilities to explore the ideas from living organisms. Micro organisms are now considering as the major source for developing DNA chips,Molecular switch etc. This new field is the Synthetic biology.
The DNA chips opened a new era in medical research and medical diagnostics. The DNA chip can provide large quantity of genomic data of microorganisms in a few hours, so that identification of the microbe is very easy. A DNA chip is a” Micro array” of genes attached at fixed locations on a solid support like glass slide or silicon membrane. Continue reading →
Not possible to see now because it is not available in shops. It is a future reality that may emerge as DNA based microprocessor. DNA based computing is an emerging technology using the biomolecule DNA as the data storage molecule. It is possible since DNA is doing data storage in the form of genetic information. If DNA computers emerge, it can store billions of times more data than the present computer. The DNA molecule of genes has the potential to perform calculations many times faster than the present microprocessors. By using the Nanotechnology, it is possible to create Nano computers to replace the Silicon based computers.