Lab Midterm

Question 1

What is a program subroutine used for?

Answer 1

sequence of program instructions that perform specific task

Question 2

explain how you can test a fuse with a multimeter to see if it’s working

Answer 2

to see if a fuse is working, test for continuity using a multimeter. a circuit does not have continuity if it is open and the multimeter should read 1. it has continuity if it is closed and the multimeter should read about 0 ohms

Question 3

What is a relay

Answer 3

electronic switch

Question 4

LCD

Answer 4

liquid crystal display

Question 5

used for directional current flow control

Answer 5

diode

Question 6

this diode produces light when it dispenses voltage

Answer 6

LED

Question 7

integrated circuit used as an oscillator or timer

Answer 7

555 timer

Question 8

potentiometer

Answer 8

variable resistor

Question 9

what does “servoposition = map (flexposition, 650,900,0,180);” mean?

Answer 9

the minimum rotation of 0 degrees in the servo is designated to the 650 decimal valve. the maximum rotation of 180 degrees in the servo is designated to the 900 decimal valve. the decimal valves are derived from the resulting voltage from bending the flex resistor.

Question 10

What are the 3 pins of a transistor called

Answer 10

base, emitter, controller

Question 11

What does PWM stand frond how is it useful to use with a servo?

Answer 11

Pulse width modulation. Describing a type of digital signal from analog results, control dimming of RGB LED’s or to control the direction of a servo motor. PWM allows us to vary how much time the signal is high in an analog fashion. While the signal can only be high or low at any time, we can change the proportion of time the signal is high compared to when it is low over a consistent time interval

Question 12

Why is a relay really helpful when using with micro controllers for sensor-controlled circuits?

Answer 12

Allow for different voltage source to power the display components than the sensor components

Question 13

SPDT

Answer 13

single pole double throw; describes how there are 2 positions for the common to connect to and produce a different flow path. The 2 positions direct the current to different components

Question 14

push button

Answer 14

manual switch

Question 15

serial to parallel convertor, used to extend the number of pins for Arduino

Answer 15

shift register

Question 16

what order instrument is a capacitor

Answer 16

first

Question 17

common components in voltage dividers

Answer 17

resistors

Question 18

output for flex sensors and soft potentiometers

Answer 18

resistance

Question 19

2N2222 transistor

Answer 19

NPN transistor

Question 20

2 main components of a relay driver

Answer 20

relay and transistor

Question 21

ohm’s law

Answer 21

V=iR

Question 22

Voltage Divider Equation

Answer 22

V1/R1=V2/R2 or

V1=(Vsupply*R1)/(R1+R2)