LED Kite Project: LED Kite Project With Uncle Andre Some maths: Some maths The Physics: The Physics The Parts of a kite 1 The Sail: The Parts of a kite 1 The Sail This can be made of any material such as paper, fabric or plastic. It is used to trap the air. The Parts of a kite 2 The Spars (sticks): The Parts of a kite 2 The Spars (sticks) These are used to hold the sail in shape. They can be made from wood, metal or plastic. Sometimes a tube of material is used and the wind inflates it. The Parts of a kite 3 The Flying line (string): The Parts of a kite 3 The Flying line (string) This stops the kite just blowing away. It can be made from cotton, string, rope or even wire. The Parts of a kite 4 The Bridle: The Parts of a kite 4 The Bridle This can be made from string or sometimes material. It is used to hold the kite at the correct angle to the wind. The Parts of a kite 5 The Keel: The Parts of a kite 5 The Keel This is made from the same material as the sail. It stops the kite going sideways and can also form the bridle. Curving the kite backwards can have the same effect. The Parts of a kite 6 The Tail: The Parts of a kite 6 The Tail This can be made from anything. They can be bows, ribbons or in many shapes. The tail is not decoration but keeps the kite in line with the wind. TYPES OF KITE: TYPES OF KITE THE ROTOR: THE ROTOR FLAT HEXAGON: FLAT HEXAGON ROKAKKUS: ROKAKKUS BOX KITES: BOX KITES COMPOUND BOX KITES: COMPOUND BOX KITES BELL TETRAHEDRAL: BELL TETRAHEDRAL SLED KITE: SLED KITE LARGE LIFTER: LARGE LIFTER SOFT KITES: SOFT KITES KITES TODAY: KITES TODAY DELTA KITES: DELTA KITES MAN LIFTING: MAN LIFTING KITE TRAINS: KITE TRAINS KITE TRAINS: KITE TRAINS USES OF KITES FRANKLIN’S LIGHTNING EXPERIMENTS: USES OF KITES FRANKLIN’S LIGHTNING EXPERIMENTS FISHING THE SOLOMON ISLANDS: FISHING THE SOLOMON ISLANDS RESCUE: RESCUE WW2 RESCUE: WW2 RESCUE TARGET PRACTICE PAUL GERBER: TARGET PRACTICE PAUL GERBER MODERN “STUNT” KITES being flown in formation: MODERN “STUNT” KITES being flown in formation CODY MAN LIFTING: CODY MAN LIFTING AVIATION DEVELOPMENT: AVIATION DEVELOPMENT EARLY TRACTION BY GEORGE POCOCK: EARLY TRACTION BY GEORGE POCOCK MODERN TRACTION BY PETER LYNN: MODERN TRACTION BY PETER LYNN 1ST KITE POWERED BOAT TO CROSS THE CHANNEL BY Samuel Cody 1903: 1 ST KITE POWERED BOAT TO CROSS THE CHANNEL BY Samuel Cody 1903 A MODERN KITE POWERED BOAT: A MODERN KITE POWERED BOAT A COMMERCIAL APPLICATION: A COMMERCIAL APPLICATION PHOTOGRAPHY THE OLD: PHOTOGRAPHY THE OLD PHOTOGRAPHY THE NEW: PHOTOGRAPHY THE NEW POWER GENERATION: POWER GENERATION Fly Kites at night?: Fly Kites at night? No one flew kits at night before because a torch light was too heavy for a kite to carry. But now with opto electronics, things are different. LED Kite: LED Kite Foundation: Foundation In this tutorial students will learn the fundamental physics of Light Quantum Physics Basic calculations for LEDs and Resistors for safety and light efficient circuit design Skills development. Learn to use a soldering iron, wire stripper, hot glue gun, digital multimeter etc. PowerPoint Presentation: Image created by Robert A. Rohde / Global Warming Art GaAs Si Electronics : Electronics Voltage, Current, Ohm’s law: Voltage, Current, Ohm’s law Resistors are used to produce desired voltage or current, independent of frequency. Resistance is measured in ohms, and the current through a resistor satisfies Ohm’s law: V = I R I in amps V in volts How to remember the code: How to remember the code Remember the color codes with this sentence: B ig B rown R abbits O ften Y ield G reat B ig V ocal G roans W hen G ingerly S lapped. PowerPoint Presentation: LED - Light Emitting Diodes UV – AlGaN Blue – GaN, InGaN Red, green – GaP Red, yellow – GaAsP IR- GaAs PowerPoint Presentation: When a light-emitting diode is forward biased, electrons are able to recombine with holes within the device, releasing energy in the form of photons . This effect is called electroluminescence and the color of the light (corresponding to the energy of the photon) is determined by the energy gap of the semiconductor. LED - Light Emitting Diodes Source http://en.wikipedia.org/wiki/Light-emitting_diode PowerPoint Presentation: Si Ge Red-Yellow: GaAs x P y :N Red: AlGaAs Orange-Green: AlInGaP Blue: SiC, GaN (InGaN) White: GaN + phosphor PowerPoint Presentation: An LED must have a resistor connected in series to limit the current through the LED. The resistor value, R is given by: R = (V S - V L ) / I Calculating an LED resistor value V S = supply voltage V L = LED voltage (usually 2V, but 4V for blue and white LEDs) I = LED current (e.g. 20mA), this must be less than the maximum permitted If the calculated value is not available, choose the nearest standard resistor value which is greater, to limit the current. Even greater resistor value will increase the battery life but this will make the LED less bright. For example If the supply voltage V S = 9V, and you have a red LED (V L = 2V), requiring a current I = 20mA = 0.020A, R = (9V - 2V) / 0.02A = 350, so choose 390 (the nearest greater standard value). PowerPoint Presentation: If you wish to have several LEDs on at the same time, connect them in series. This prolongs battery life by lighting several LEDs with the same current as just one LED. The power supply must have sufficient voltage to provide about 2V for each LED (4V for blue and white) plus at least another 2V for the resistor. To work out a value for the resistor you must add up all the LED voltages and use this for V L . Connecting LEDs in series PowerPoint Presentation: Kite building session and kite flying on National Day 2013. You’ll never hate physics again!