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workshops:public:steampunk_led [2018/05/22 14:06] andrei ↷ Page moved from workshops:2016_deliveries:steampunk_led to workshops:public:steampunk_led |
workshops:public:steampunk_led [2018/06/13 17:52] 127.0.0.1 external edit |
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| - | ====== Steampunk LED ====== | + | ====== Steampunk LED ====== |
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| This is a small manually powered gear-driven generator made from ply and acrylic, with a Joule thief circuit. \\ | This is a small manually powered gear-driven generator made from ply and acrylic, with a Joule thief circuit. \\ | ||
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| It is also a really cheap kit (current estimates have it less than A$3.00 in materials, not including laser cutting time). | It is also a really cheap kit (current estimates have it less than A$3.00 in materials, not including laser cutting time). | ||
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| Project developed by Daniel Flood and Peter Musk for the Independent Schools Queensland Makerspace Roadshow, and delivered at six locations across Queensland between April and September, 2016. \\ | Project developed by Daniel Flood and Peter Musk for the Independent Schools Queensland Makerspace Roadshow, and delivered at six locations across Queensland between April and September, 2016. \\ | ||
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| - | ===== Summary ===== | + | ===== Summary ===== |
| ===Science=== | ===Science=== | ||
| This device is an energy converter that takes kinetic energy as an input, and produces electrical energy, and subsequently light. \\ | This device is an energy converter that takes kinetic energy as an input, and produces electrical energy, and subsequently light. \\ | ||
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| Using a large gear to drive the small cog attached to the generator increases the rpm to a point where the output voltage is useful. The motor used can act as a generator because it contains permanent magnets set around coils of conductive wire which are attached to the shaft of the motor. When the shaft spins, these coils are moved through a magnetic field and a voltage is induced in the wire, available through the black and red tails on the motor/ | Using a large gear to drive the small cog attached to the generator increases the rpm to a point where the output voltage is useful. The motor used can act as a generator because it contains permanent magnets set around coils of conductive wire which are attached to the shaft of the motor. When the shaft spins, these coils are moved through a magnetic field and a voltage is induced in the wire, available through the black and red tails on the motor/ | ||
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| Turning this available energy into something useful is due to the Joule Thief circuit, and in particular the toroid. In simple terms, as energy moves through the wire wrapped around the ferrite toroid, a magnetic field is induced in the toroid, which rapidly collapses as the transistor reaches a threshold voltage and switches on. The collapsing magnetic field induces a spike of higher voltage energy in the secondary toroid wire, which is directed through the LED and causes it to glow if the threshold is reached. As this occurs, the transistor is turned off, and the entire cycle begins again. Because this happens very rapidly (about 200,000 times a second, depending on the specific characteristics of the resistor and transistor), | Turning this available energy into something useful is due to the Joule Thief circuit, and in particular the toroid. In simple terms, as energy moves through the wire wrapped around the ferrite toroid, a magnetic field is induced in the toroid, which rapidly collapses as the transistor reaches a threshold voltage and switches on. The collapsing magnetic field induces a spike of higher voltage energy in the secondary toroid wire, which is directed through the LED and causes it to glow if the threshold is reached. As this occurs, the transistor is turned off, and the entire cycle begins again. Because this happens very rapidly (about 200,000 times a second, depending on the specific characteristics of the resistor and transistor), | ||
