5 facts about wireless power transmission we are sure you did not know about

Wireless power transmission has been around for a while but off late it has picked up a lot of momentum. Wires are a hassle and if gadgets can be wireless then it saves a lot of space and ugly wires.

wireless power transmission

wireless power transmission

We are still waiting for a breakthrough technology in wireless transfer of energy which can solve the problem of longer distance. If that becomes a reality, world will soon see a revolution around wireless energy which will be powered by Wi Fi routers and will be easily available at public places.

This can be made into a school project try our do it yourself wireless power transmission kit to tacch this great technology of the future to children.

wireless power transmission

wireless power transmission

http://www.projectsforschool.com/product/wireless-power-transmission-2/

Facts –

  1. There are two ways of wireless charging one is inductive and magnetic charging and other is by radio frequency energy.
  2. Wireless energy is already being used to charge electric toothbrushes, it much safer as their proximity to water. The conventional wire charging is considered a hassle.
  3. The discovery of the basic principle was done by Michael Faraday back in 1931. Legendry scientist Nikola Tesla was already doing great experiment using the same principle.
  4. Wireless charging can reduce CO2 emissions and are much more sustainable.
  5. Not only phones but soon all of the technology would be working on wireless charging that will include electric cars as well.
wireless power transmission

wireless power transmission

 

To keep things exciting we have an amazing kit which children can make and learn about wireless power transmission.

5 Best Science Museums in the world

Best Science Museums in the world

There are many science museums in the world which hold the world’s best science inventions and science experiments taken place in the history. Here is the list of some of the Best Science Museums in the world.

  1. Natural History Museum, London, United Kingdom

The museum was established in 1881, Natural History Museum is famous for its rare exhibits of dinosaur skeletons, animals, plants, human biology, fossils, minerals, natural resources and much more. The history of science comes live while visiting this particular one.

Best Science Museums in the world-natural-history-museum-london-united-kingdom

Best Science Museums in the world-natural-history-museum-london-united-kingdom

  1. National Air and Space Museum, Washington D.C., United States 

This museum is the world’s best aviation and human flight history museum. It is exciting to see all the failures which led to success of today’s aviation industry.  It will take you to journey from first human flight attempt to the first human on moon and everything that has taken place in world’s aviation history.

 Best Science Museums in the world-national_air_and_space_museum

Best Science Museums in the world-national_air_and_space_museum

  1. Deutsches Museum, Munich, Germany

The museum is located on the small museum island on the Isar river, and exhibits over 28,000 different objects covering some 50 fields of science and technology. One of the highlights of the museum is a reconstruction of the Cave of Altamira in Spain, where some of the world’s oldest cave paintings were discovered. A perfect walk back in time to understand history in the making and how science has changed us all.

Best Science Museums in the world-deutsches_museum_Germany

Best Science Museums in the world-deutsches_museum_Germany

  1. Academy of Natural Sciences, Philadelphia, United States

This museum is world’s oldest museum as it was opened in 1812. This museum has a collection of over 17 million specimens which also includes famous   43ft T-Rex Skeleton.

Best Science Museum in the world- Academy of Natural Sciences, Philadelphia, United States

Best Science Museum in the world- Academy of Natural Sciences, Philadelphia, United States

  1. Universeum, Gothenburg, Sweden

This fantastic science museum is heaven for kids. It has fantastic collect and also includes exhibitions, interactive displays, an aquarium and even a three-story rainforest where nature is displayed in all its glory.

Best Science Museums in the world-universeum

Best Science Museums in the world-universeum

Museums are a special part of interactive hands on learning where children can experience science and history first hand. Regular tours to the museums and science centres should be necessary part of all school curriculum.

We at www.projectsforschool.com support hands on experiential learning where in children get to experience science instead of just reading about it. Have a look and take a tour of our website www.projectsforschool.com . All feedback is welcome.

Traffic light

Did you know the first traffic light actually exploded injuring its operator?

The first traffic light ever was installed on December 9, 1968 in London outside the House of Parliament to control the traffic in the nearby three streets.

Based on all the future developments, traffic lights can be classified in various ways.

Traffic light

Traffic light

Classification on the basis of the automation of traffic lights:

There are two categories of traffic control system: A fixed system and a dynamic one. The dynamic traffic control systems can be further classified based on the types of detectors used in them.

The fixed traffic light control system is configured to switch lights after a certain period of time. The time interval depends on the region and traffic values. It has a controller that moves with dial timers to be able to display a certain color for a small interval of time.

Dynamic traffic control systems, on the other hand, are more appropriate as they are able to adapt their settings according to the crowd present at different times of day.

When a car passes over the Embedded Detector, it simply sends the information to the traffic light. In this way, the traffic system which can already control the timing by itself, knows for sure that there’s a line of cars waiting for the signal to go green. This kind of detector is generally expensive due to its cost installation and maintenance.

Mounted Detectors are quite affordable and its installation is not affected by any other systems located in its proximity. Not only these are inexpensive, but they also send over more information to the traffic lights which include real-time photos.

Classification on the basis of the use of a traffic signal

Let’s look at the following categories:

Junction Signal:

This signal control vehicles coming towards a certain junction in a contradictory manner. With the help of a camera mounted on it, it monitors and responds to the flow of traffic, whether heavy or light.

Pelican:

It facilitates the street crossing for people. This signal displays a digital dotted green-man signal or a red-man signal crossing for a fixed interval of time. Hence, it indicates for common people, according to its color, when it is safe to cross the street and when not.

Toucan:

This signal controls a shared crossing for common people and cyclists. It is usually wider than the Pelican Crossing mentioned above. It has standard red/green/yellow signals with a green digital cycle next to the man hence controlling the traffic of both of them (Cyclists and Pedestrians) at the same time. When the Toucan is busy, detectors help it by increasing the crossing time.

Equestrian Crossing:

This is mainly used by horse riders and more than often referred to as Pegasus crossing. Red and green horse signal display helps the riders to know when you can cross the street and when not.

Zebra:

Last, but not least, this is the one we all are very familiar with. It is again a pedestrian crossing facility. This mostly works in combination to the traffic light. When a pedestrian steps on to this area, a motorist has to give way. This crossing also has orange flashing light at both its end to indicate the presence of the crossing.

Zebra crossing

Zebra crossing

Traffic Signal Color Coding:

Red was the color that denoted blood and thus it was selected to stop the vehicles. It became the symbol of danger. Also, even in misty environment, red color could be seen from far distance and hence avoided fatal collisions.

Green symbolizing nature was chosen as signal for relaxing as observed by human emotions. And it was clearly visible at the night time and since it is quite a contrast in comparison to red and yellow, it would never create confusion for the drivers.

As for Yellow, most people believe that it symbolizes sun and is taken as a sign of caution.

Over the years, traffic lights have evolved although maintaining the basic colors to accommodate people suffering from color blindness. Red-green color blindness, these days, is the most common form of visual impairment. Hence the red light comes with a little orange and green comes with a little blue to address this socio-medical issue.

We can conclude that traffic lights were a great invention for all of us. But what if I tell you can build one too? That way you could teach him about this simple invention that we use in our day to day lives. Don’t worry; you can get the raw materials from Projects For School-Traffic light DIY Kit. If you are a parent who believes in “Practical is always better than just theory “then this is the ‘go to’ place for you.  Explore it. You just might find a great science project for your kids this semester!

 References

http://www.theguardian.com/notesandqueries/query/0,5753,-1460,00.html

http://www.autoevolution.com/news/how-do-traffic-light-control-systems-work-41839.html

http://www.rulesoftheroad.ie/rules-for-driving/traffic-lights-and-signals/traffic-lights.html

http://www.drivingtesttips.biz/pelican-crossing.html

https://www.safedrivingforlife.info/blog/whats-difference-between-zebra-puffin-and-pelican-crossings

 

 

Alarms

Alarms and it’s types 

               Alarms are used to alert people to potential danger. However, they are useless if people don’t recognize the alarm and know what it means. They should know how to respond to a particular alarm. Whether it is a family function, a school, or a place of business, an alarm should be in place to alert people. These days, most alarms are electronic in nature and it helps to understand their components and functionality. In this article we will look at that and also some types of alarms.

Components of alarms:

Electronic alarm systems are made up of components designed to detect, determine and deter threatening situations.

  • Motion Sensors:

    They can detect movement in a room or a corridor.

Alarms

Motion Sensors

  • Glass Break Detectors:

    They are designed to constantly listen for the sound of breaking glass. When it detects the sound pattern caused by shattering glass, it sends an electronic signal to the alarm control panel.

Alarms

Glass Break Detectors

  • Shock Sensors:

    They can detect an intruder who is using force to pound through a wall or any area of a structure.

Alarms

Shock Sensors

  • Keypad:

    Keypad is used to arm and disarm an alarm system. They are generally installed near the entrance or exit of a building.

Alarms

Keypad

 TYPES OF ALARMS

  1. Carbon Monoxide Alarms

Carbon monoxide is an odourless, invisible gas that can lead to poisoning. These alarms use electro-chemical sensing technology to alert you.

  1. Burglary

A thief breaks the glass of your shop! Instantly a high pitched wail sounds in the air! Almost every house or shop abroad has burglar alarms. Unfortunately, the practise is not very common here in India.

  1. Fire

Smoke and fire alarms warn people of the presence of fire in a building. Some alarms have the feature of alerting the nearest fire department. Many places, such as schools and college dormitories, perform drills to practice what to do in case of a fire alarm.

  1. Flood

It has nothing to do with warning you of the infamous Mumbai floods. Water damage from a faulty water heater can be just as damaging to a home as a fire. Flood alarms sense the presence of water and can be programmed to shut the water off when it is nearing a flood zone.

  1. Weather Alarms

U.S faces tornadoes, hurricanes and horrific forest fires every year. It is extremely important to be able to recognize alarms that warn of severe weather. Many cities have public alarm systems that sound informing people to take shelter. The National Weather Service issues severe weather warnings through television and radio broadcasting systems.

        We’ve all seen Charlie’s Angels break into top security vaults and moving out with groundbreaking pieces of technology. They protect our life and our property! How about trying this simple circuit diagram of an alarm available as DIY science project for alarms at http://www.projectsforschool.com

We love to assist our visitors, students, parents in their quest to learn science, you are welcome to leave your questions / comments. Chat with us, use contact us from here or on our facebook page (www.facebook.com/projectsforschool/). In conclusion, drop us an email for any other queries and we would certainly reply with an answer to your queries!!

Electric Cooking Heater

Electric Cooking Heater Project

We do have a project kit for demonstrating the heating effect of electricity (Heating effect of current) and a how to make guide for the same. But if you want to make a full fledged electric cooking heater project, you would need to get the Nickel Chromium heating wire and asbestos frame to keep it on kitchen table. With these two things, you can make a DIY electric cooking heater project.

Electric cooking heater project and its components

These two components are easily available in any electrical shop. Get these two components, along with a 5A electric wire and a power plug. When you connect the electric wire to Nickel Chromium wire and switch on the electricity, it would turn red, and heat up. You can basically use this arrangement for cooking.

(This article is based on a query received on our chat tool. We love to assist our visitors, students, parents in their quest to learn science, you are welcome to leave your questions / comments, chat with us, use contact us form here or on our facebook page, drop us an email, and we would certainly reply with an answer to your queries!!)