Solved - ***Newbie**** Need help with simple project

[system]

I am trying to control a simple DC motor with a potentiometer. I have pulled from a couple of online places on how to wire and do the sketch. I have setup to see through the serial window that the potentiometer is sending signal for the motor. The motor will not come on. I have verified the motor will work, I have used a volt meter and tell I am getting voltage, but it will not come alive. Attached is a picture of my setup and below is my code. Any help for this newbie will be appreciated.

int potPin = A0; // select the input pin for the potentiometer
int motorPin = 9; // select the pin for the motor
int potValue = 0; // variable to store the value coming from the pot
int motorValue = 0; // varialbe to set the value for the motor

void setup() {
pinMode(motorPin, OUTPUT);
pinMode (potPin, INPUT);
Serial.begin(9600);
}

void loop() {
potValue = analogRead(potPin);
motorValue = map(potValue, 0, 1023, 0, 255);
analogWrite(motorPin, motorValue);
Serial.print ("potentiometer = " );
Serial.print (potValue);
Serial.print ("\t motor = " );
Serial.println(motorValue);
delay(2);

}

[system]

I can't see from the photo what is driving the motor.

Please use code tags when posting code.

[Robin2]

You can't drive a motor directly from an Arduino pin - it can't produce enough current - only 40mA - and you are likely to damage the Arduino.

Can you show us a diagram of how you have things connected.

...R

[system]

AWOL - I will learn up posting with code tags, thank you.

Rboin2 - Attached are my schematics.

[system]

You cannot drive a motor directly from an Arduino's output pin.
Have a look in the Playground for ways of buffering the output.

You may already have damaged your Arduino.

[UKHeliBob]

The schematic shows a transistor between Arduino pin 9 and the motor, so the pin is probably OK. However, it also shows the motor powered from the 5V rail of the Arduino which is almost certainly not OK.

[system]

After having a day away from it, I figured out what was wrong. I should of been running the (-) to the Transistor. Below is my corrected schematics that is working. The potentiometer controls the motor as I was looking for. I did change one thing in the code.

motorValue = map(potValue, 0, 1023, 0, 255);
to
motorValue = map(potValue, 0, 1023, 120, 255);

I found it to be basically as low as it would run with out turning off. It was just to see what it does by changing the min/max.