lx 2 Flashcards
(51 cards)
electricity
flowing energy charged by particles pushing and pulling on electromagnetic forces
electrons
negatively charged particles. repels itself
protons
positively charged particles. repels itself
voltage (v)
pressure that pushes current through circuit. potential difference and conductor makes the current flow. measured in volts.
na voltage standard
120
appliance voltage standard
240
current (I)
rate of electric charge flowing through a conductor. measured in amperes (amps(a)). produced by batteries and generators.
direct current
electrons move constantly in one direction
alternating current
electrons move in one direction, and then another
wattage
measures amount of power used (watts). W=V x A
resistance (R)
impedes flow. measured in Ohms. too much current runs the risk of explosion.
Ohm’s law
V= I x R
electrical circut
voltage, current wattage, and resistance forms circuit. pathway electricity travels to get to fixture
closed circuit
power
open circuit
no power
circuit breaker
trips to stop current from carrying too much. 15-20 amps. made to break so electricians are careful not to overload the breaker. maximum load, W= V x A. Electrician’s use 80% of capabilities
unit numbering
goes from stage left to stage right, down stage to upstage
dimmers
could have rack, many plugs
dmx
digital multiple x, controls lights an fog machines. goes in one direction (daisy chain). high resistance of electricity. 5 pin connector (do not use 3 pin)
universe
512 channels. most theaters have at least 3 universes. a fixture cannot be on 2 universes
dmx address
0-255. 1 to 16 - 1. 17 to 32- 2
art-net
32,750 universes on 1 cable. slow
sACN
streaming architecture of controlled network. send less info.
dmx to ethernet
needs nodes to convert
