Shake Flashlight

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www.NDSCSnano.com Shake Flashlight North Dakota State College of Science Applied Science and Technologies www.NDSCSnano.com

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Shake Flashlight. North Dakota State College of Science Applied Science and Technologies. www.NDSCSnano.com. Electrical Basics. Current is the flow of electrons Voltage is electrical pressure Resistance is the opposition to the flow of electrons - PowerPoint PPT Presentation

Transcript of Shake Flashlight

Page 1: Shake Flashlight

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Shake Flashlight

North Dakota State College of ScienceApplied Science and Technologies

www.NDSCSnano.com

Page 2: Shake Flashlight

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Electrical Basics

• Current is the flow of electrons• Voltage is electrical pressure• Resistance is the opposition to the flow of

electrons• Ohm’s Law: V = I x R (voltage = current x

resistance)

Closed CircuitClosed Circuit

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Basic Electrical Principle

A magnetic field is generated around a wire as current flows through it. http://www.educypedia.be/electronics/javaelectricity.htm

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Shake Flashlight

The basic principle of "moving magnet plus coil makes electricity" is the foundation for electrical generators, so in a sense this is old technology.

http://www.msscweb.org

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Voltage Generation

When a magnet passes through a tightly-wound coil of insulated wire, a voltage is generated. As the magnet changes direction, so does the polarity of the voltage. This action generates an AC voltage.

http://www.msscweb.org

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Schematic

The AC voltage is sent to a full-wave bridge to convert the AC to a pulsating DC voltage. This energy is stored in Capacitor C1. The switch turns on the LED.

http://www.msscweb.org

http://www.play-hookey.com/ac_theory/ps_rectifiers.html

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Components

http://www.msscweb.org

Full-wave Diodes Capacitor (Battery)

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