Question

Need to figure out the coding to complete this Circuit Board.

If you are able to post how the Circuit will be wired with the Arduino and the Motor Controller as well that would be great.

Objective: Develop an understanding of how a Pulse Width Modulation (PWM) signal can control the speed of a motor Description of Lab 10: In this lab we will be using using TimerOne to provide a PWM signal and then use the analog inputs on Analog Discovery (ADisc). The code for this assignment is similar to that in D_PWM Demo.pdf. A) Supply a PWM from the Arduino on pin 10, and have it so that the Duty Cycle can be set. Code for this can be found in "Files->CourseNotes->D_Hardwarelnterfacing->O PWM_Demo.pdf". B) Connect the motor drive to the Arduino. The circuit looks like the following Blue Red Green 1 2 3 4 Motor JI +12v -V1 Analog Discovery 1N4001 D1 IRF510 Q1 R1 PWM Si 10K IRF510 GDS C) Connect the motor's tachometer lines (Yellow and Green) to the ADisc's analog input +V1 and-V1, as is shown in the circuit. Also connect the +V2 to the PWM signal and -V2 to ground. As a test, set the PWM to approximately 50% or a setting of 510-515 on Timer 1 should be work. Record the duty cycle, of the PWM, and frequency of the tachometer signal. Demonstrate this to the lab instructor and include a screen shot of this test D) Record the frequency for a duty cycle of approximately 90%, 80%, 70%, 60%, 50%, 40%, 30% and 20%. A table of these should be included E) The report consists of a screen shot exemplifying the test, and the table of results from part D

Answer 1

//Initializing PWM Output Pin
int pwm_pin = 10;
int duty_limit = 255;
/*Replace 255 for the desired duty cycle
* replace by 127 for 50% duty cycle
* replace by 0 for 0% duty cycle
* replace by 255 for 100% duty cycle
* replace by 191 for 75% duty cycle
* replace by 64 for 25% duty cycle
*/
void setup() {
//Declaring pin as output
pinMode(pwm_pin, OUTPUT);
}

void loop() {
//Toggling the PWM
for(int i=0; i<duty_limit; i++){
analogWrite(pwm_pin, i);
delay(5);
}

for(int i=duty_limit; i>0; i--){
analogWrite(pwm_pin, i);
delay(5);
}
}

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