ahsch of the following pins can be assigned the analog Wirite functions pyM pins

Question

ahsch of the following pins can be assigned the analog Wirite functions pyM pins A) Serial port D) A0 - A5 pins B) All pins C) Digital PWM Which function needs to be included to compile code, even if it is empty? D) digitalWrite A) setup B) pinmode C) digitalRead )What does PWM stand for? A) Pulse Width Modulation C) Pre-wired Matrix B) Primary Wave Methods D) Post World Monitoring What is the value of input when A0 is 307? input- map (analod Read(A0), 0, 1023, 0, 255) D) 30.7 A) 364 B) 76.5 C) 127 What does the mapping function provide? A) Allows for the use of colored LEDs B) Alters the range of a value from one scale to another C) Helps the Arduino to track or map digital values D) Helps the Arduino to track or map Analog values The Arduino correlates temperature readings with what? A) Boolean B) Current D) Kelvin )What is the correct format for interrupts? A) attachlnterupt (interrupt, pinMode, OUTPUT) C) attachinterupt (0, changePulse, Falling): B) attachInterupt (interrupt, isr, mode); D) attachinterupt (interrupt, changePulse, Rising) Which of the following represents an LED? A) A ?) ? C) C D) B

Explanation / Answer

Ans 12)- The analogWrite() function is normally used to print out or give an analog output. This function is only accessible to the digital PWM pins of the Arduino. An Analog value corresponding to the duty cycle is calculated and it is given as AnalogWrite to the selected PWM pin, from where we receive a PWM signal corresponding to the Ananalog value calculated

Ans 13) The setup ?function is Must in a program or else it will display as an error due to the missing setup function. Using of all other specified functions in the option wont display an error message in its absense if it is not being used

Ans 14)PWM stands for Pulse Width Modulation.? Its is square with a varying width between the pulses. the Width between the pulses can be varied by changing duty ratio.

Ans 15)An Arduino analog input from 0-5V is mapped as 0-1023 by the Analog to digital converter. That is athe voltage is converted into a digital value. When 5 V is given as input to A0, the digital value is 1023. or the resoltion of arduino is 5/1024. Therefore for 307 the input is 301*(5/1024)=1.5V(approx)

Ans16)In the Map function the analog input which was converted to dc value 0- 1023 is now being mapped to new raange i that is from 0-255. there for the new resolution becomes 5/256 for analog input. The new digital value for 1.5V input becomes (1.5*256)/5=76.5(approx)

Ans17) As mentioned Earlier in the prior option, map() function alters the range of values from one scale to another

Ans 18)Arduino correlates every input with voltage. The arduino only has an inbuilt Analog to digital conveter which converts our analog signal which is a voltage level into a digital value. Even Current measurement are done in terms of voltage and then be converted to current by dividing the voltage measured with a resistor through which input is given to the arduino.

Ans 19) the Recommended format of Interrupt is

attachInterrupt(digitalPintoInterrupt(pin),ISR,mode);

usin pin no. for the digital pin to interrupt command is also a permissible format, therefore the option C is the better pick

Ans20)Option A is the correct format of an LED as the arrow must be pointed outward showing that the photons or light is emmitted out of the diode.

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