the distance measured by the ultrasonic sensor is calculated using which formula
(v x t)/2
The wavelength of a 40 kHz ultrasonic wave in air is approximately
8.6 mm or 0.0086 m
Which physics principle allows the ultrasonic sensor to detect objects
Reflection of Sound Waves
which pin made should be used for connecting a push button to Arduino with an internal pull-up resistor
INPUT_PULLUP
In Arduino code what does delay (250): mean
Wait for 250 milliseconds
Why do we divide by 2 in the distance formula of the ultrasonics sensor
the wave travels to the object and back
What will happen if you use a passive buzzer with simple HIGH/LOW signals
it will produce only a faint click or tone
Which factor affects the speed of sound in air the most
Temperature of the air
the angle of detection for the HC-SR04 ultrasonic sensor is approximately
15 degrees
A potentiometer is best described as
A three terminal adjustable resistor that can acts as a voltage divider
How many electrical terminals does a typical potentiometer have
3
The middle terminal of a potentiometer is commonly called the
Wiper
When a potentiometer is wired across 5 v and GND, the wiper provides
A continuously variable voltage between 0 v and 5 v
In schematic symbols, the IEC style typically shows a resistor as a
Rectangle
In schematic symbols, the ANSI style typically shows a resistor as a
Zig-Zag line
The wiper arrow drawn touching the resistor symbol ( IEC or ANSI) indicates
An adjustable contact that moves along the resistive track
using a pot as a voltage divider means
The wiper and both ends are used to generate a variable output voltage
A digital signal can take what set of values
Discrete/Noncontinuous
what is the maximum amplitude of a digital HIGH signal
5 v
What does the term Period (T) mean
the time taken for one cycle
On Arduino Uno/Mega analogRead() of a pot on A0 returns what value of bits
0-1023( 10 bit)
analog Write() on a PWN pin mainly controls LED brightness by changing
Duty Cycle
In PWM, increasing the duty cycle will
Increases average output voltage
An LED controlled with PWM appears dimmer when
Duty Cycle is low
