Electrical Action Fuzing Flashcards
What color is traditionally the positive
Red
What color wire is normally the negative
Black
When working with LEFs and other resistors the longest leg is what
Positive
In capacitors the arrow points to what
The negative leg
What function do diodes perform
The allow current to flow in only one direction
In transistors and scr’s the base leg does what
Function the switch activating the transistor completing the circuit
What is the charge to an anode positive or negative
Negative
The utilization of a capacitor and a resistor is an example of what type of switch
Time delay
The difference between and transistor and an scr is what
A transistor is a momentary switch
An SCR is a latching switch and maintains connection until the circuit is broken
What do photo cells/ light dependent resistor (LDR) in a transistor circuit do
Detects the absence or presence of light and allows current to flow through the base leg, turning on the transistor
A 555 switch is what kind of switch
Timer
A 4020 chip is what kind of switch
Counter
What does IC stand for
Integrated circuit switch
What does a resistor and capacitor and a 555 switch have in common
They are both time delay switches
What are the indicators of a command device
Antenna’s
Servos
Battery packs
Braided wires
What does a PIR (passive infrared) switch detect
Temperature changes and movement in zones
What are capacitors used for
Power source
Timing delay
How are AIR (active infrared) device activated
By interrupting the infrared beam
How does an RC (resistor/capacitor) circuit work
It slows down the flow of electrons pulling them into the capacitor before it allows the base leg to latch activating the transistor
What is a transistor
An electric switch
What function does the base leg of a transistor do
Is the trigger and turns on the transistor
What causes a collapsing circuit to function
Battery decay, cutting the wrong wire, anti-disturbance
What causes movement of the contacts in a relay
Energizing/de-energizing of the coil
What are some products in which you’d find an IC chip
Analog: amplifiers, timers, oscillators, voltage regulators
Digital:Microprocessors, memories, microcomputers
