Tag Archives: Motor Controller

In this video lesson we show you how you can control a small DC motor using the Raspberry Pi Pico W and a TA6586 DC Motor Controller. We show you how to control both the speed and direction. The schematic for the circuit we use is here:

When using the breadvolt, or any battery power supply on a breadboard project, do not turn the power supply on while the Raspberry Pi Pico is connected to USB, as you could generate voltage conflicts. It is an either or. If the USB is connected, the power supply should be OFF. Or if you are going to connect the USB, first turn off the power supply.

In the lesson, we developed the following code for your convenience:

from machine import Pin,PWM
import time
icPin1=Pin(14,Pin.OUT)
icPin2=Pin(15,Pin.OUT)
fPWM=PWM(icPin1)
rPWM=PWM(icPin2)
fPWM.freq(1000)
rPWM.freq(1000)
try:
    while True:
        for speed in range(20,101,10):
            rPWM.duty_u16(0)
            fPWM.duty_u16(int(speed/100*65535))
            time.sleep(.25)
        for speed in range(100,-1,-10):
            rPWM.duty_u16(0)
            fPWM.duty_u16(int(speed/100*65535))
            print(int(speed/100*65535))
            time.sleep(.25)
        time.sleep(2)
        for speed in range(20,101,10):
            fPWM.duty_u16(0)
            rPWM.duty_u16(int(speed/100*65535))
            time.sleep(.25)
        for speed in range(100,-1,-10):
            fPWM.duty_u16(0)
            rPWM.duty_u16(int(speed/100*65535))
            print(int(speed/100*65535))
            time.sleep(.25)
        time.sleep(2)
        
        
except KeyboardInterrupt:
    print("Program Stopped by User")
    rPWM.duty_u16(0)
    fPWM.duty_u16(0)
    time.sleep(.15)
    rPWM.deinit()
    fPWM.deinit()
    icPin1.off()
    icPin2.off()

from machine import Pin,PWM

import time

icPin1=Pin(14,Pin.OUT)

icPin2=Pin(15,Pin.OUT)

fPWM=PWM(icPin1)

rPWM=PWM(icPin2)

fPWM.freq(1000)

rPWM.freq(1000)

try:

while True:

for speed in range(20,101,10):

rPWM.duty_u16(0)

fPWM.duty_u16(int(speed/100*65535))

time.sleep(.25)

for speed in range(100,-1,-10):

rPWM.duty_u16(0)

fPWM.duty_u16(int(speed/100*65535))

print(int(speed/100*65535))

time.sleep(.25)

time.sleep(2)

for speed in range(20,101,10):

fPWM.duty_u16(0)

rPWM.duty_u16(int(speed/100*65535))

time.sleep(.25)

for speed in range(100,-1,-10):

fPWM.duty_u16(0)

rPWM.duty_u16(int(speed/100*65535))

print(int(speed/100*65535))

time.sleep(.25)

time.sleep(2)

except KeyboardInterrupt:

print("Program Stopped by User")

rPWM.duty_u16(0)

fPWM.duty_u16(0)

time.sleep(.15)

rPWM.deinit()

fPWM.deinit()

icPin1.off()

icPin2.off()

Arduino, Tutorial

Arduino Tutorial 40: Controlling DC Motor Speed and Direction with Pushbuttons

December 10, 2019 admin

In this lesson we explore how to control the speed and direction of a DC motor using two buttons. We are using the L293D motor controller and a small DC motor for demonstration purposes. An official Arduino Uno R3 is available HERE. In this new series of lessons, I will be using the sensor and other components found in this KIT. The basic circuit was explained in Lesson 37, and we are using that work as a starting point. The schematic below will get you started in connecting your circuit. Be sure and connect one of the Arduino ground pins to the ground rail in the second to the bottom row in the diagram below. It is good practice to connect all your grounds together.

Connection Diagram for a DC Motor Controller using the L293 Control Chip

The code we developed in the video lesson is shown below for your convenience.

int speedPin=5;
int dir1=4;
int dir2=3;
int BP1=8;
int BP2=9;
int B1Val;
int B2Val;
int mSpeed=0;
int dt=500;

void setup() {
  // put your setup code here, to run once:
pinMode(speedPin,OUTPUT);
pinMode(dir1,OUTPUT);
pinMode(dir2,OUTPUT);
pinMode(BP1,INPUT);
pinMode(BP2,INPUT);
digitalWrite(BP1, HIGH);
digitalWrite(BP2, HIGH);
Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
B1Val=digitalRead(BP1);
B2Val=digitalRead(BP2);
Serial.print("Motor Speed ");
Serial.println(mSpeed);

if (B1Val==0){
  mSpeed=mSpeed-10;
  delay(dt);
}
if (B2Val==0){
  mSpeed=mSpeed+10;
  delay(dt);
}
if (mSpeed>255){
  mSpeed=255;
}
if (mSpeed<-255){
  mSpeed=-255;
}
if (mSpeed==10){
  mSpeed=100;
}
if (mSpeed==-10){
  mSpeed=-100;
}
if (mSpeed==90 || mSpeed ==95){
  mSpeed=0;
}
if (mSpeed==-90 || mSpeed==-95){
  mSpeed=0;
}
if (mSpeed==0){
  analogWrite(speedPin,0);
}
if (mSpeed>0){
digitalWrite(dir1,LOW);
digitalWrite(dir2,HIGH);
analogWrite(speedPin,mSpeed); 
}
if (mSpeed<0){
digitalWrite(dir1,HIGH);
digitalWrite(dir2,LOW);
analogWrite(speedPin,abs(mSpeed)); 
}


}

int speedPin=5;

int dir1=4;

int dir2=3;

int BP1=8;

int BP2=9;

int B1Val;

int B2Val;

int mSpeed=0;

int dt=500;

void setup() {

// put your setup code here, to run once:

pinMode(speedPin,OUTPUT);

pinMode(dir1,OUTPUT);

pinMode(dir2,OUTPUT);

pinMode(BP1,INPUT);

pinMode(BP2,INPUT);

digitalWrite(BP1, HIGH);

digitalWrite(BP2, HIGH);

Serial.begin(9600);

}

void loop() {

// put your main code here, to run repeatedly:

B1Val=digitalRead(BP1);

B2Val=digitalRead(BP2);

Serial.print("Motor Speed ");

Serial.println(mSpeed);

if (B1Val==0){

mSpeed=mSpeed-10;

delay(dt);

}

if (B2Val==0){

mSpeed=mSpeed+10;

delay(dt);

}

if (mSpeed>255){

mSpeed=255;

}

if (mSpeed<-255){

mSpeed=-255;

}

if (mSpeed==10){

mSpeed=100;

}

if (mSpeed==-10){

mSpeed=-100;

}

if (mSpeed==90 || mSpeed ==95){

mSpeed=0;

}

if (mSpeed==-90 || mSpeed==-95){

mSpeed=0;

}

if (mSpeed==0){

analogWrite(speedPin,0);

}

if (mSpeed>0){

digitalWrite(dir1,LOW);

digitalWrite(dir2,HIGH);

analogWrite(speedPin,mSpeed);

}

if (mSpeed<0){

digitalWrite(dir1,HIGH);

digitalWrite(dir2,LOW);

analogWrite(speedPin,abs(mSpeed));

}

Arduino, Tutorial

Arduino Tutorial 37: Understanding How to Control DC Motors in Projects

November 19, 2019 admin

In this lesson we learn the ins and outs of controlling a DC Motor from an Arduino. A key aspect of this is to understand you must not connect a motor directly to an arduino. You need to either build a suitable transistor and diode circuit, or you need to utilize a motor controller, such as the L293D motor control chip.

The video below explains how to hook things up and how the code works. You must always be mindful that you are using a motor with current requirements that are consistent with the motor controller and power supply you are working with. Failure to do so could result in damage to components or injury.

The circuit used in this video tutorial is shown below:

It is a good practice to have all grounds connected in a circuit, so I would connect an arduino ground to the ground rail of the breadboard.

An official Arduino Uno R3 is available HERE. In this new series of lessons, I will be using the sensor and other components found in this KIT.

The code is described in the video, but if you need help, this is the code we used in the lesson.

int speedPin=5;
int dir1=4;
int dir2=3;
int mSpeed=90;

void setup() {
  // put your setup code here, to run once:
pinMode(speedPin,OUTPUT);
pinMode(dir1,OUTPUT);
pinMode(dir2,OUTPUT);
Serial.begin(9600);

}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(dir1,LOW);
digitalWrite(dir2,HIGH);
analogWrite(speedPin,255);
delay(25);
analogWrite(speedPin,mSpeed);
delay(5000);
}

int speedPin=5;

int dir1=4;

int dir2=3;

int mSpeed=90;

void setup() {

// put your setup code here, to run once:

pinMode(speedPin,OUTPUT);

pinMode(dir1,OUTPUT);

pinMode(dir2,OUTPUT);

Serial.begin(9600);

}

void loop() {

// put your main code here, to run repeatedly:

digitalWrite(dir1,LOW);

digitalWrite(dir2,HIGH);

analogWrite(speedPin,255);

delay(25);

analogWrite(speedPin,mSpeed);

delay(5000);

}

Technology Tutorials

Tag Archives: Motor Controller

Control DC Motor With Raspberry Pi Pico W and TA6586

Arduino Tutorial 40: Controlling DC Motor Speed and Direction with Pushbuttons

Arduino Tutorial 37: Understanding How to Control DC Motors in Projects

Making The World a Better Place One High Tech Project at a Time. Enjoy!