I am trying to control a 12V DC motor with two microswitches. The purpose of the two microswitches is to switch the direction of the motor. The motor is controlled using a h-bridge. To run the motor, the power source is a 9V battery.
Problem: Once I connect the two micro switches (ONLY ONE microswitch works at all times), it gives a random output. The 3 scenarios:
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One microswitch works perfectly and the other doesn't. Meaning once the microswitch is pressed, the motor switches direction but when I click the second microswitch, it does not switch direction.
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I press the working microswitch and it changes the direction multiple times (I'm assuming it detects multiple presses)
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None of the push buttons works...
I have a project due soon (less than one week), I would really appreciate it if you can help me.
Attached is a photo of breadboard and the micro-switches
ALSO, when I use 2 push buttons (located on the breadboard, not in the photo**), the direction of the motor switches perfectly just not with the micro-switches...
EDIT* CLICK LINK FOR SCHEMATIC : schematic hosted at ImgBB — ImgBB
code:
/*
Arduino Starter Kit example
Project 10 - Zoetrope
This sketch is written to accompany Project 10 in the
Arduino Starter Kit
Parts required:
two 10 kilohm resistors
2 momentary pushbuttons
one 10 kilohm potentiometer
motor
9V battery
H-Bridge
Created 13 September 2012
by Scott Fitzgerald
Thanks to Federico Vanzati for improvements
http://arduino.cc/starterKit
This example code is part of the public domain
*/
const int controlPin1 = 2; // connected to pin 7 on the H-bridge
const int controlPin2 = 3; // connected to pin 2 on the H-bridge
const int enablePin = 9; // connected to pin 1 on the H-bridge
const int directionSwitchPin = 4; // connected to the switch for direction
const int directionSwitchPin1 = 6; //Connected to the switch1 for direction
// create some variables to hold values from your inputs
//int onOffSwitchState = 0; // current state of the On/Off switch
//int previousOnOffSwitchState = 0; // previous position of the on/off switch
int directionSwitchState = 0; // current state of the direction switch
int previousDirectionSwitchState = 0; // previous state of the direction switch
int directionSwitchState1 = 0; // current state of the direction switch1
int previousDirectionSwitchState1 = 0; // previous state of the direction switch1
//int motorEnabled = 0; // Turns the motor on/off
//int motorSpeed = 0; // speed of the motor
int motorDirection = 1; // current direction of the motor
void setup(){
// intialize the inputs and outputs
pinMode(directionSwitchPin1, INPUT);
pinMode(directionSwitchPin, INPUT);
//pinMode(onOffSwitchStateSwitchPin, INPUT);
pinMode(controlPin1, OUTPUT);
pinMode(controlPin2, OUTPUT);
//pinMode(enablePin, OUTPUT);
// pull the enable pin LOW to start
//digitalWrite(enablePin, LOW);
}
void loop(){
// read the value of the on/off switch
//onOffSwitchState = digitalRead(onOffSwitchStateSwitchPin);
delay(1);
// read the value of the direction switch
directionSwitchState = digitalRead(directionSwitchPin);
// read the value of the direction switch1
directionSwitchState1 = digitalRead(directionSwitchPin1);
// read the value of the pot and divide by 4 to get
// a value that can be used for PWM
//motorSpeed = analogRead(potPin)/4;
// if the on/off button changed state since the last loop()
//if(onOffSwitchState != previousOnOffSwitchState){
// change the value of motorEnabled if pressed
// if(onOffSwitchState == HIGH){
// motorEnabled = !motorEnabled;
// }
// }
// if the direction button changed state since the last loop()
if (directionSwitchState != previousDirectionSwitchState) {
// change the value of motorDirection if pressed
if (directionSwitchState == HIGH) {
motorDirection = !motorDirection;
}
}
// if the direction button changed state since the last loop()
if (directionSwitchState1 != previousDirectionSwitchState1) {
// change the value of motorDirection if pressed
if (directionSwitchState1 == HIGH) {
motorDirection = !motorDirection;
}
}
// change the direction the motor spins by talking
// to the control pins on the H-Bridge
if (motorDirection == 1) {
digitalWrite(controlPin1, HIGH);
digitalWrite(controlPin2, LOW);
}
else {
digitalWrite(controlPin1, LOW);
digitalWrite(controlPin2, HIGH);
}
// if the motor is supposed to be on
// if (motorEnabled == 1) {
// PWM the enable pin to vary the speed
// analogWrite(enablePin, motorSpeed);
// }
// else { // if the motor is not supposed to be on
//turn the motor off
// analogWrite(enablePin, 0);
// }
// save the current On/Offswitch state as the previous
previousDirectionSwitchState = directionSwitchState;
// save the current On/Offswitch1 state as the previous
previousDirectionSwitchState1 = directionSwitchState1;
// save the current switch state as the previous
// previousOnOffSwitchState = onOffSwitchState;
}
