Pull back toy

Toy is joyfully device found in everyone home where small kids are present.

If we pull wire connected to doll and leave it it will move,simple electronics is used to make beautiful toy.

If we pull wire wheels of dolls will get energy pulling energy converted into mechanical energy and its connected diode it will produce light.

Few things about pull back toy

• Toy has wind up mechanism inside pull it back and release it will move
• gears and spring is made used inside the toy
• Advantage of using this toys are no batteries required.
• Two gears are made used to move the toy
• Gear ratio : when large gear rotate once small gear which is connected rotate more than once.

Inside view of toy 

Parts of pull toy

Gears connected to diode

A diode is connected to gear in the motor it will make diode to emit light, mechanical friction is used to generate light. 

A pull back toy is one of the most common toys available on the market. We pull it backwards and then let it go. it travels across almost the entire room before stopping . We pull it back just a few inches, but the distance traveled by the car is 8-12 feet. 

A pull back toy works on the general principle of Newtons Third Law of motion. every action has equal and opposite reaction. The toy car moves forward much further than it was pulled backward. This is possible because of the gears present inside the toy.

When the toy is pulled back, it winds up an internal coil spring by engaging the motor with a clutch. when the toy is released, the spring unwinds and propels the toy forward.

Energy is stored quickly during pullback but gets released slowly during forward motion . The Winding of spring is 10 times faster than when it unwinds. This is achieved with the help of two gear trains present.

Dolly With pull back gears

When we pull the wire and leave it will move forward while emitting light.

Electronics components

Electronic gadgets have become an integral part of our lives. They have made our lives more comfortable and convenient. we have many applications of electronics like aviation, medical and healthcare etc.

Most gadgets have tiny electronic circuit that can control machines and process information, electronic circuits are the lifeline of various electrical appliances.

There are 2 types of components 

Active components: Electronic component which supplies energy to the circuit.

common examples of active components include:

voltage sources

current sources

generators

all types of transistor.

Diodes.

Passive components : Components incapable of controlling current by means of electrical signal are called passive devices.

common examples of passive components include:

Resistors

capacitors

Inductors

Transformers

List of components

Resistor: oppose current and pass current directly proportion to voltage.

Capacitors : capacitors store and release electrical charge. It stores energy in electric field.

Diode : Conduct electricity easily in one direction, among more specific behaviors.

power sources

• Battery : acid or alkali based power supply.
• power supply : usually a main hook-up
• photovoltaic device : generates electricity from light.

Switch : A switch is an electrical component that can disconnect or connect the conducting path in an electrical circuit, interrupting the electric current or diverting it from one conductor to another

Inductors : An inductor is considered as passive element of circuit, because it can store energy in it as a magnetic field, and can deliver that energy to the circuit.

Semiconductor : Semiconductors are materials which have a conductivity between conductors and non conductors.

Integrated circuits : An integrated circuit refers to a special device that had all the components required in an electronic circuit. The component has diodes, transistors and other devices, all of which are etched on a tiny piece of silicon. The componrts are used in watches and computers.

Batteries : Bateeries convert chemical energy into electrical energy. two different cells of a battery are anode ( + ) and cathode (-).

Fuses : Fuses help preserve components from overloading with excessive current. A fuse consists of connection body, support, contacts, and metal-fuse material such as Zinc or copper.

Motors : Motors convert electrical energy into mechanical energy. Key components include a rotor, stator, bearings, and eye bolt.

Circuit Breakers : As a protective device, a circuit breaker can be controlled with a remote switch. It is designed to protect the circuit from overloading or a short circuit.

Battery life

What is Battery

A battery is a device consisting of one or more electrochemical cells with external connections for powering electrical devices such as flashlights, mobile phones, and electrical cars.

when a battery is supplying electric power, its positive terminal is the cathode and its negative terminal is the anode.

Battery

How Battery works

A battery is a device that stores chemical energy and converts it to electrical energy. The chemical reactions in a battery involve the flow of electrons from one material (electrode) to another through an external circuit. The flow of electrons provides an electric current that can be used to do work.

Rechargeable battery 

How to preserve more battery on mobile.

Battery 

Few methods:

• Battery saver mode: switch on battery saver mode which will help battery to stay for longer time.
  
• Background battery usage: Go to settings and choose which applications can use battery when your not using phone this will save battery unnecessarily used by application.
  
• Dark mode : choose dark mode so that all screen appears in dark.
• Always on mode: switch off this option will save more battery.

How to save battery life :

1. Do not charge overnight using fast charger, if we use fast charger more heat will be produced which may lead to damage of battery.
2. Use standard company charger and power bank.

Battery Facts.

Batteries work by providing continuous DC.The battery will work until all of the energy has been used up. If it rechargeable it can be used again. If it is not rechargeable then it is garbage.

The power in a battery is created by chemistry.

Rechargeable batteries are used in cars.

NiMH batteries are nickel metal hydride and are commonly used in portable electronics such as toys and portable home phones.

Batteries can come as wet cell or dry cell.

it is possible to use potatoes as source of battery power, although they are not capable of producing a lot of it.

Lemons can also be used to make power.

What is Internet

Internet has taken control over life nowadays, without internet nobody can be at peace at-least for 15 min.

nowadays we are doing everything digitally which requires internet.

phonepe, whatsapp, paytm, google pay, many things in which we are depend on internet.

What is internet.

The Internet is the global system of interconnected computer networks that uses internet protocol(TCP/IP) to communicate between networks and devices.

internet is just connection of devices through wires, cables. whole world is connected. connection is done by different companies let's have a brief idea.

Tier 1 company lays optical fiber all over world through sea route.

Tier 2 company works on country wise.

Tier 3 company works on local wise.

How does Internet work.

when two people chat from INDIA to SINGAPORE internet is made used ,packet (data) which we want to send from one machine to another machine will travel the routing path with data protection in such a way that in middle one can decode that data. 

up-to one point data will travel through Wi Fi but whole world is connected through cables, like optical fiber which carry the data(packets).

The ISP which we make use (to which we are paying money) they will carry our data and send upto India border once its touches the Singapore there ISP will carry the packets and they will make sure data will reach the end user.

both the countries are paying for optical fiber laying through sea, so both countries are making use of it.

IP address is given to all devices which helps identify the device.

Few Facts about internet

• The internet is 9110 days old today.
• Internet would weigh about 50 grams. as per scientist who measured the weight of multiple billions of electrons which make up the data that we send back and forth every day.
• half of world population make use of internet.
• Walking sticks, umbrellas, shirts, water bottles, tails all this can be connected to internet.
• The average person spends more than 10 hours a day with internet, which is more time then we sleep.

Future of internet 

The infrastructure which we make use to run the internet in backend will have higher version of devices like router, switches, load balancer and firewall.

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Fan

Fan is found in almost everyone house, its very much needed when temperature increase and humans feels hot especially during summer.

Fan working mechanism.

Electric fan works on the principle of conversion of electric enegry into mechanical energy and in this case mechanical energy is the rotarty motion. When AC is supplied to electric fan it first reaches capacitor. capactior sends high energy to the stator windings.

stator windings develops rotating magnetic field and which forces the rotor to rotate in the direction of magnetic field.

electrical energy is converted into mechanical energy, rotor and housing to spin and the blade attached to the housing throws away the air nearby and create cooling effect.

Fan

Parts of Fan

Capacitor : capacitor is used to store energy, this store energy is used to rotate the fan from rest state.

Axle: Axle is the metallic rod mostly made up of mild steel. Axle is connected from ceiling to fan housing 

Bearings: Ball bearings are used in the electric fan, 2 bearings which are link between housing and axle gives the rotary motion to the housing.

stator : stator windings is to convert electric current into magnetic field.

Rotar: Rotar in the electric motor is the permanent magnetic in the shape of half circles.

Housing: outer part or the electric fan.

Blades : Blades or wings used to rotate.

Future of electric fan.

Electric fan make use of 9% of residential energy, which is almost equal to power plant energy, so in future by using BLDC  technology  we can reduce use of energy by electric fan.

BLDC motor are more efficient.

xerox machine

Xerox machine is found in every office, every college, especially near engineering college we can see xerox shops, as we all know students wants Xerox notes during exam.

everyday while going to college we may go through xerox shop,after getting jobs we use xerox machine but never taught how does it work lets know it.

Xerox machine 

how does xerox machine work.

xerox machine work on the principle that opposites attract. Toner is a powder that is used to create the printed text and images on paper. The drum which is located in the heart of a photocopier, is positively charged using static electricity. An image is transferred using laser.

Main function :

photocopier produce copies using laser technology, a dry process that uses electrostatic charge on a light-sensitive photo-receptor to transfer toner onto paper to form an image.

Static electricity:

paper which we want photocopy is placed downwards onto a sheet of glass. using static electricity , an image of this paper is projected onto a positively charged drum. The coating on the drum can conduct electricity when light hit it.

Charging :

cylindrical drum is electrostatically charged by a high voltage wire called charge roller. The drum has a coating of a photo conductive material. A photo-conductor is a semiconductor that becomes conductive when exposed to light.

Exposure:

A bright lamp expose document to make a copy.

Developing :

Toner is positively charged when it is applied to drum to develop the image.

Few facts of xerox machine.

color copies helped make Disney's 101 dalmatian

danger of catching fire.

Components of xerox machine.

• Laser
• Photo-conductive Drum
• charge corona
• Toner unit
• Transfer corona 
• Fuser unit
• Cleaning unit
• Ribbon
• Print-head
• Ink cartridge

Xerox machine we use in many ways but we never electronics is made used there  

Amazon quiz

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Question 1 of 5:

Who recently became the first batsman to hit centuries in back to back IPL matches?

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Which of these actors is one of the producers of the movie Chhalaang starring Rajkummar Rao?

The answer is- Ajay Devgn

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Which former model's bronze statue was recently unveiled in her hometown of Sevniça in Slovenia?

The answer is- Melania Trump

 

Question 4 of 5:

What mandatory cloth is used in the making of this flag? (See Images)

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Which car manufacturer accquired this brand of cars in 1998? (See Images)

The answer is- Volkswage

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