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Electricity and Electronics
Fossil Fuels and nuclear energy still account for over 60% of the UK's electricity generation and in some countries their use is even on the rise. As well as containing clear explanations and graphics to illustrate how energy from coal, gas and uranium is used to generate electricity, this resource explores the pros and cons of each fuel source. It includes debates around nuclear safety, fracking and carbon capture and storage.
DVD / 2015 / 27 minutes
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The drive to reduce greenhouse gas emissions means that many governments are trying to decarbonise electricity generation. But some renewables only generate electricity when conditions are right. They're also very location dependent and can often face opposition from local residents. From wind, to solar, biomass, HEP, tital and geothermal power - as well as explaining how different renewables are used to generate electricity, this DVD examiners the pros and cons of each energy source.
DVD / 2015 / 44 minutes
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This DVD resource looks at how electricity is distributed from power station to consumers along the National Grid. As well as giving an overview of the entire distribution network, it also looks at how step up and step down transformers are used to reduce line loss during transmission and to make the voltage safe for use in homes. Other safety features, such as earth rods, insulators and circuit breakers are explained and this DVD gives an insight into the part they play in larger scale systems.
DVD / 2015 / 29 minutes
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Scientists created the Eden Project, a hot and humid tropical environment, by building an enormous greenhouse made of a special plastic foil. The material is transparent, allowing for sunlight to reach the plants. With advancements in science and engineering, not only can we predict and limit the impact of environmental disasters, but we can imitate nature itself. Scientists and engineers have developed systems to monitor potential flood areas to help mitigate natural disasters. Areas along rivers that have a propensity to flood are equipped with systems that include key elements: inputs, processing, outputs, and feedback. Inputs are the means by which the system gathers information. Eight hundred and fifty outstations along the river are equipped with sensors that record the height of the river and rain gauges to keep track of rising waters. If it rises too fast, there is a warning system to people nearby; otherwise it can usually be controlled by a series of dams or sluice gates. Local weather forecasts are part of the processing. These factors combined create a system that has eliminated dangerous floods by controlling the river at different points through electronics.
DVD / 2013 / (Grades 4-9) / 15 minutes
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Water evaporates from lakes and oceans all over the world, condenses to form clouds, precipitates as rain and snow and then flows back to the oceans. This is the global water cycle. Hydroelectric power takes advantage of this cycle to generate electricity by using moving water as its energy source. Because the water cycle is a constantly recharging system, it is an excellent source of renewable energy. Traditional hydroelectric power uses the energy of moving water to turn hydraulic turbine blades. These spinning blades turn a generator shaft that produces electricity. The generator converts this energy into electricity. Engineers have developed innovative technologies that take advantage of other sources of energy from water including ocean currents, tides and waves. In this program, traditional systems are explained, as well as new technologies that take advantage of currents and waves.
DVD / 2013 / (Grades 4-9) / 15 minutes
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Communications technology is everywhere. We send and receive information through televisions, internet, email, radio, text message and social media. This program goes into depth about how electronic communication has evolved over time. Whether using an old rotary phone or some new technology, there are basic principles behind each that many of us are unfamiliar with. Land line telephones send sound waves that are converted into electrical impulses that work with a series of switches and routing devices that open an electrical pathway to whomever you're calling. More commonly, cell phones operate by means of a modulated electromagnetic wave basically a radio. These signals connect to an electronic communications network. Metropolitan areas are divided into small networks where antennas send and receive signals depending on the user's location.
DVD / 2013 / (High School or above) / 15 minutes
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This program examines how electronics systems monitor the environment to help scientists influence certain weather conditions and understand the impact on humans and animals in a variety of scenarios. One example is the unique electronic systems developed to regulate humidity and temperature in a biome designed to emulate the Amazon Rainforest. With advancements in science and engineering, not only can we predict and limit the impact of environmental disasters, but we can imitate nature itself. Flooding is a natural disaster that affects people all over the world. Electronic river management systems are being put in place so potential flooding can be identified and possibly controlled. This program shows how we are utilizing electronics to understand environmental conditions and help to avoid disaster. As more biomes across the planet experience extremes in weather and as more natural disasters such as hurricanes and tsunamis affect densely populated areas, this technology will increase in importance.
DVD / 2012 / (High School or above) / 15 minutes
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Peer inside any electronic device and you will see at the heart of that device, a printed circuit board. These boards which used to connect just enough capacitors and resistors to run a simple transistor radio are now used to run all of our electronic devices. New technology has shrunk the size of all of the components that attach to the board, the width of the wires that connect them and even the size of the circuit board itself. Without the printed circuit board, our world would look a lot different.
This program details the processes involved in planning, designing, and building printed circuit boards. The process begins when a design is created in computer-aided design software. Students will learn what materials are used to construct the boards as well as how the circuits are planned and built into the boards.
DVD / 2012 / (High School or above) / 16 minutes
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This DVD provides an overview of the charging system, with its battery, alternator, voltage regulator, and starter solenoid; a detailed examination of the alternator and its construction; a close -up look at the function of the alternator's rectifier; and a comparison of the internal voltage -type voltage regulator with its predecessors, the remote solid state and contact point voltage regulators.
DVD / 2009 / 14 minutes
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In this DVD, an automotive technician shows how to diagnose charging system malfunctions: first, by visual inspection of battery terminals, wires, belts, and fuses/fusible links, and then by gathering data with an amp meter, a volt meter, a noise detector, and a load tester. The DVD also demonstrates how to remove an alternator (both swivel mount and spring -loaded idler pulley types) and install and then test a new or rebuilt replacement.
DVD / 2009 / 10 minutes
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After thoroughly reviewing the fundamentals of the ignition system, this video focuses in on five components: spark plugs, secondary wires, ignition coils, distributors, and electronic control units. Distributorless ignition systems are discussed as well.
DVD / 2009 / 16 minutes
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In this program, an automotive technician demonstrates how to inspect, maintain, and replace secondary wires, spark plugs, distributors, ignition coils, electronic control units, and power train control modules. Ignition timing is also covered, and common problems involving all components are illustrated, with an emphasis on spark plugs (flashover, insulator cracks, fouling, incorrect gap, and incorrect spark duration) and distributors (carbon traces, burnt cap tower, pickup coil damage, and incorrect air gap in the crankshaft sensor).
DVD / 2009 / 17 minutes
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This DVD explains the functions of the starting system and the construction of its components in detail: the battery, starter motor, starter drive, solenoid, in -dash or in -column ignition switch, and neutral safety switch or clutch switch.
DVD / 2009 / 13 minutes
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In this video, an automotive technician troubleshoots the most common problems involving the starting system. Difficulties with the battery, solenoid, starter, flywheel, pinion gear, and secondary wiring are considered, with special attention given to testing, removing, and replacing the starter motor and solenoid. Problems with the neutral safety switch and column -mounted ignition switch are also covered.
DVD / 2009 / 13 minutes
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Although the specific procedures for using load testers vary by car make and model, the general procedures are similar for all testers and vehicles. This DVD explains how to use a load tester to analyze the state of the battery, starting system, and charging system. Footage of an auto tech in action shows viewers how to check for a poor connection at the battery cables, measure battery voltage, check the amount of current drawn through the starter when cranking the engine, and measure the amperage output of the alternator and voltage regulator.
DVD / 2009 / 11 minutes
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