https://en.wikipedia.org/wiki/Ampere
https://en.wikipedia.org/wiki/Electric_current

SI Unit: ampere
SI Symbol: A

Water Analogy: current, rate

`A = C / s`

Think: number of buckets per second

https://en.wikipedia.org/wiki/Voltage
https://en.wikipedia.org/wiki/Volt

SI Unit: volt
SI Symbol: V

Water Analogy: pressure

https://en.wikipedia.org/wiki/Watt
https://en.wikipedia.org/wiki/Electric_power

SI Unit: watt
SI Symbol: W

Watt => power consumption, "demand"

`A * V = W`

1 horsepower = 746 Watts

power x time = energy

`W * s = J`

`W = J / s`

https://en.wikipedia.org/wiki/Ohm
https://en.wikipedia.org/wiki/Electrical_resistance_and_conductance

SI Unit: ohm
SI Symbol: Ω

Ohms (resistance)

https://en.wikipedia.org/wiki/Coulomb

SI Unit: coulomb
SI Symbol: C

1 C (coulomb) = 6.24 x 10¹⁸ e (electrons)

Think: 1 bucket of electrons

https://en.wikipedia.org/wiki/Joule

Energy unit is joule (J)

`J = W * s`

`J = (kg * m^2) / s^2`

10 x 100-watt light bulbs => 1000 watts = 1 kW "demand"
for 2 hours => "consume" 2 kWh

12 amps at 240 volts => 2,880 watts
12 amps at 120 volts => 1,440 watts

1/12 of an hour = 5 minutes
2,880 watts for 5 minutes => 240 watt-hours (0.24 kilowatt-hours)
15.5 cent per kW => $0.0372

kWH measures energy. Joules measures energy. kWH and Joules measure the same thing.

kWH (energy) is the same thing as Joules (energy)

`1 kWh = (1000 * W * h) = (1000 * W * h)*((60m)/(1h)) = (1000 * 60 * W * m) = (1000 * 60 * W * m) * ((60s)/(1m)) = (1000 * 60 * 60 * W * s) = 3600000 * W * s`

`1 kWh = 3600000 J`

1. Why do LEDs use amps, but lightbulbs use watts? (750W)
2. Are resistors on the negative or positive terminal? Is either fine?
3. Why don't batteries use amps?
4. What is kilowatt-hour?
5. What is reverse voltage?
6. What is forward voltage?

• https://www.circuito.io/

• arduino displays
  I2C  128x64 oled LCD  0.96"

• jump wires
• resistors

• http://michaelbluejay.com/electricity/
• 2 amp-hour (battery life) => 2A:1h, 1A:2h, 4A:0.5h
• https://www.youtube.com/watch?v=vFsmuAejI84
• incandescent or halogen, led
• In electronic circuit theory, a "ground" is usually idealized as an infinite source or sink for charge, which can absorb an unlimited amount of current without changing its potential.
• Source Date: 2011-05-29T09:13 PST
• http://en.wikipedia.org/wiki/Ground_(electricity)
• http://www.sciencebuddies.org/science-fair-projects/project_ideas/Elec_primer-simplecircuit.shtml
• http://www.robotroom.com/Pumpkin2.html
• Electric Generator
• neodymium magnets
• Capacitor
• magnetism electricity gravity
• free electrons
• alumnium/copper film
• protons => element
• neutrons => isotope