An essential electronics reference guide for beginning hackers and makers

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Abbreviations-Definitions.md

##Schematic/Formula Symbols, abbreviations, and Definitions

• I: amps, amperes
• V: volts
• R: resistance
• Ω: ohm
• C: coulomb
• Q: charge
• S: siemens
• τ: time constant

###Symobl Prefixes

##Terms

###Very Important Terms (safety first!)

Note: This is by no means an exhaustive list of the dangers of working with electricity

• Power Ratings: ,see [Sparkfuns]'s page on Power Ratings
• Power Loss:
• Thermal Stress:

###Common Terms

• Polarity:
• Joules:
• Coulomb:
• Watt:
• Voltage:
• Charge:
• Resistance:
• Ohm:
• Current:
• Series:
• Parallel:
• Capacitance: The ability of a body to store a charge. All conductors have capacitance to varying degrees

Note: The first time I learned that adding a resistor to a circuit in a parallel configuration decreased the overall resistance, I had to really scratch my head. After some digging on the internet, I found a particularly helpful question on physics.stackexchange.com. Several of the answers that weren't accepted do a great job of explaining this concept in a way that beginners can understand. Check it out: Parallel Circuits and decreasing resistance

###Advanced Terms

• Conductance: Basically the opposite of resistance, meaning the ease at which an electric current passes through a conductor. Parallel circuits and decreasing resistance

Common-Circuit-Components-Parts.md

###Basic components

• Resistor: Creates a varying amount of Resistance in a circuit based on the build of the component. Colored markings on a resistor will ,see Decoding Resistors
• Diode:
• Capacitor:
• Voltage Regulator:
• Amplifier:
• Transistor:

###Common Components (abbreviations and definitions)

• IC:
• PCB:
• LED:
• SMD: Surface Mounted Device (has pins)
• Drivers:

Electrical-Tools.md

##Measurment Tools

• Multimeter:
• Oscilloscope:
• Thermometer:

formulas.md

###Ohm

###Voltage

###Amperes

###Watts

watt = joule/second

Wattage (Power) calculations in a purely resistave circuit

W = V<sup>2</sup>/R
W = I<sup>2</sup> x R

###Coulomb

###Capacitance

Time Constant Formula

τ = R x C (tau is equal to the resistance in ohms times the cpacitance in farads)