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Electrial Circuits of a Coffeemaker

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Sarah Fitzgerald

on 17 December 2012

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Transcript of Electrial Circuits of a Coffeemaker

Electrical Circuits in a Coffee Maker
But have you ever considered how this coffee maker works? Everyone has used a coffee maker at some point in their lives Coffee Maker This is the coffee maker that we will be dissecting shown on this picture is a coffee maker as seen from the outside Join me as we explore the inner workings of a coffee maker and discover what really happens before you add the sugar. Before we take a look at what happens inside let's take a look at the basics. A coffee maker is a appliance that brews coffee from cold water and ground coffee beans. The coffee beans are place into a paper filter in a funnel at the top and the cold water is placed in a different compartment. The cold water is than heated to a boil and directed into the filter and runs through the coffee beans dripping hot, fresh aromatic coffee into the pot below the filter. The coffeemaker that we will be dissecting is a electric drip coffee maker. This is the most common type of coffeemaker used today, you can find one in almost every home. The electrical energy that comes into the coffeemaker must be used to do many things such as: turn on the light that indicates that the coffeemaker is on
heat up the cold water used to make that coffee
send the boiling water to the filter
keep the heating pad ,located under the pot, heated
power the thermostat that measures the temperature of the water and disconnects the circuit to keep it from over heating The electrical energy that enters the coffeemaker through the wall plug is converted into 3 different types of energy to help work the coffeemaker these energies are: The electrical energy is converted into light energy to power the light bulb that indicates that the coffeemaker is on and running Finally, the electrical energy is converted into convection currents in the water which forces it up the tube in the back and into the filter. The electrical energy is converted into Thermo energy which is used to heat the water and to keep the heating pad warm. A coffeemaker may seem quite complicated for, it completes many different tasks and uses many different types of energies however, the electric circuits in this device are actually fairly simple using one simple, parallel circuit with only 2 branches to power the whole coffeemaker Parallel Circuit This has been included for, it demonstrates quite efficiently the components of the circuits. The above diagram shows the parallel circuit located in the coffeemaker that is going to be dissected. Electrical Circuit This picture shows the first step of the electrical dissection, it shows the electrical circuiting inside the coffeemaker. This image is shown because it depicts the AC circuit and the path that the electrons takes, starting with the line in and returning to the neutral. Light
Convection These are the line and the neutral, otherwise known as the power source, the energy comes in through the line and returns back to the neutral to be recharged. neutral line This is the switch which turns the coffeemaker on and off This is a resistor, it helps to control the flow of current to the light bulb. Resistor This pictures is included because it shows the resistor as it actually is in the circuit on the coffeemaker. Wow the teacher feature: the coloured bands on the resistor are codes that can tell you the resistor's rating This is a light bulb, it is also a load. it is used to indicate that the coffeemaker is on . Light bulb This picture is included for it shows the light bulb in the coffeemaker and it's circuit board This is a thermostat switch, it acts as both a switch and a load, it acts as a load for it uses power to measure the temperature of the water as it passes, however, it is also used as a switch because, as the temperature becomes too hot it opens up, thus breaking the circuit. This picture was included because, it not only shows the thermostat but it also shows where it opens up to disconnect the circuit. Wow the teacher feature, this thermostat would be set just above the boiling point of water, so we can assume that it is set at about 120C This is a thermo overload, it is designed to melt if the temperature gets too high, it is a back up for the thermostat, it will melt and the circuit will be disconnected. This picture has been included because, it shows the thermo overload. Thermo overload Wow the teacher feature: a thermo overload acts almost like a fuse, the only difference is that the thermo overload reacts to heat, whereas, the fuse reacts to current. This is the heating coil that heats the water to a boil and causes it to climb into the funnel where the coffee beans are located, it also heats the heating pad, where the finished coffee sits. This picture has been included because, it shows where the heating coils are placed, underneath the putty. Heating Coil How coffee is made
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