Basic electronics 101

Discussion in 'Landscape Lighting' started by NickN, Jun 14, 2005.

  1. NickN

    NickN LawnSite Bronze Member
    from Alabama
    Posts: 1,010

    Since most lighting systems utilize a transformer that converts AC voltage to DC voltage,I'll stick with the DC side of things.
    Voltage= The amount of energy required to move an amount of electrical charge.The symbol for Voltage is (E)
    Electric circuit = A minimum of three components are required for all electric circuits:a source of energy,a load,and connecting wires.
    Electron current = The quantity of electric charges that move past a given point during a period of 1 second(s).The symbol for current is (I)
    Resistance = A factor in elelctrical circuits that is similar to mehcanical friction.The purpose of resistance is to limit or control the amount of electic current in a system.(Lights are a source of resistance.The wire in the bulb is high in resistance,so it generates friction or heat.In turn the wire glows from this and generates light.)The symbol for resistance is (R)
    Ohm= A practical unit of measurement of electrical resistance.
    Conductance= The description of the ability or ease with which a material conducts current.
  2. Frog Lights  LLC

    Frog Lights LLC LawnSite Member
    Posts: 191

    YOU get an A. A= very good ! want a job?
  3. NickN

    NickN LawnSite Bronze Member
    from Alabama
    Posts: 1,010

    Luckily,you didn't count off for spelling. lol!
  4. KathysLGC

    KathysLGC LawnSite Bronze Member
    Posts: 1,345

    i think this will help some people with wiring but now how about some examples of resistance in multiple lighting systems and how to wire them. Wiring in series etc.
  5. NickN

    NickN LawnSite Bronze Member
    from Alabama
    Posts: 1,010

    I'm planning on doing that.I just have to find the time.
  6. KathysLGC

    KathysLGC LawnSite Bronze Member
    Posts: 1,345

    Yeah that takes a bit of knowledge to be able to explain it properly so people can follow.
    You plan on explaining capacitors too?.... :) >all though I think they are already included with the LED light set-ups...
  7. greenworldh20

    greenworldh20 LawnSite Senior Member
    Posts: 659

    lighting design is sooooooooooooooooooooooooooo easy. just do the math. it is the same concept in irrigation if you think about it...

    if you have 10 gpm and a head uses 3 gpm then you can put 3 heads on said zone.

    if the zone is 400 feet away from water source, run big main line, then tee of lateral in smaller pipe sizes.

    now for lights,

    if you have a 300 watt transformer, you can put 8 vista well lights with 35 watt bulbs on one 'zone'.

    if the run is far, use thicker cable and loop it. if run is short, less than 40 feet, use thinner cable.

    simple....there are other tricks of the trade...anyone care to share?

  8. arosewag

    arosewag LawnSite Member
    Posts: 45

    I try to run 1 'main' line to a spot that is approximately equal distance from each of the lights that will be on the zone, then run a secondary line to each fixture. Easy to troubleshoot if ever a problem, and keeps voltages similar.
  9. Frog Lights  LLC

    Frog Lights LLC LawnSite Member
    Posts: 191

    I like it!
  10. yz250fpilot

    yz250fpilot LawnSite Member
    Posts: 168

    A lot of documentation nowadays has Voltage denoted with a "V" for Voltage instead of an "E" which denotes Electromotive Force, which is Voltage. Just for people who may not know, V, and E are the same thing.

    There are also 2 basic formulas that will help you immensely.

    I = E/R ........Current(amps) = Voltage(volts) Divided by Resistance(ohms)


    P = I x E ......Power(watts) = Current(amps) multiplied by Voltage(volts)

    Remember these!

    Here is a good website that explains many aspects of electricity and electrical circuits.


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