76 lines
1.3 KiB
Markdown
76 lines
1.3 KiB
Markdown
# Glossary
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## Volts
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Voltage
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## Amperes
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Current
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## Ohms
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Resistance
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## Watt (Power)
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$Power = V * I = \frac{V^{2}}{R} = I^{2}R$
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Joules per Second
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Term | Symbol | Weight
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Nanowatt | nW | 10-9
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Microwatt | $\micro$W | $10^{-6}$
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Milliwatt | mW | $10^{-3}$
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Watt | W | $10^{0}$
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Kilowatt | kW | $10^{3}$
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Megawatt | MW | $10^{6}$
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Gigawatt | GW | $10^{9}$
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**Examples:**
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Device | Power
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-------|----------
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Arduino| 167mW
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Laptop | 1.5W
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House | 2.2kW
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## Ohms Law
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$$
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V = \frac{I}{R}
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$$
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## Impedance
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= Resistance for Nerds
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## Current
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How many electrons flow through a circuit in a second
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## Polarity
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Means if a component is symmetric or not
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Polarised means that a component is not symmetric
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## Voltage Divider
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## Farad
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Term | Symbol | Weight
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Picofarad | pW | $10^{-12}$
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Nanofarad | nF | $10^{-9}$
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Microfarad | $\micro$F | $10^{-6}$
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Milifarad | mF | $10^{-3}$
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Kilofarad | kF | $10^{3}$
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## LED
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Anode - The shorter Leg
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Cathode - The longer Leg
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## Diode
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## Anode
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The positive end of a diode
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## Cathode
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The negative end of a diode
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## Conventional Current Flow
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When electricity was discovered people thought the electrons flow from the positive terminal to the negative, in actuality they flow in the opposite direction, but it is still possible to calculate the flow with the old way. |