EPICS Exam 1 Review

Arduino

Open-source microcontroller

Reads inputs and controls outputs

14 digital input/output pins

6 analog pins can be powered via USB or external forces (5-12V)

Analog Signal VS Digital Signal

Infinite possibilities

Finite set of possible values

Void Setup VS Void loop

Void setup is just the initial steps to run and loop is the repeated steps after setup.

DC VS AC energy

DC is one-directional while AC is an electrical current that periodically reverses direction and changes its magnitude continuously.

Voltage Source

V, Volts -|+-|- with a circle and + on top and - on bottom in the middle of the circle

Ground

Always 0 volts

Gnd represented by and upside down T and two lines below it

Resistor and Potentiometer

Both represented by ohm and the greek o-ish symbol

Ohms Law

V=IxR

Voltage

I=current

Resistor

Electrical Power

Rate at which electrical energy is converted into another form.

P=VxI

I=Current(A,Amps)

Resistor Values

Series Resistor Formula

Req=R1+R2

Parallel Resistor Formula

Req=1/1/R1+1/R2

HC-SR04 Ultrasonic Sensor

Detects distance from electrical sound pulses.

Range up to 13 feet

Looks like two little speakers

Distance Calculation

SpeedxTime

Potentiometer