PJ027: Drive Servo Motor Using PWM by Arduino

Requirement:

• Read the codes as reference, write your own code and fix the red-marks to make a working result

• Test and analyze how it works 

Core Knowledge (Must Know):

• digitalWrite(pin, value)

• delayMicroseconds(us)

Questions:

• Change line 7 for different values, if we want to go to 30 degrees, what value should be for on_time_us?

Requirement:

• Read the codes as reference, write your own code and fix the red-marks to make a working result

• Test and analyze how it works, input from serial

  • 500

  • 900

  • 1500

  • 2100

  • 2500

Core Knowledge (Must Know):

• digitalWrite(pin, value)

• delayMicroseconds(us)

Questions:

• What will happen if we input < 500 or >2500?

Challenge:

If we want to get user input as degrees to go, but not the milliseconds that doesn't mean so much for user, how to improve the code?  Tips:

on_time_us = map(input_angle, 0, 180, 500, 2500);