arduino help

[Captain Slacker]

i do not have an h bridge but i only need it for one directionality shoulding i be able to power the board and then just power the motor from the board and control it with a delay

[MAldridge]

pardoning the broken speech, a relay will sufice if you just need the motor to spin one way.

You should NEVER source drive current from an arduino. Each pin is wired for only 20ma. You should source your motor current from the main bus rails of whatever you are building. If you are bent on only needing 3.3v, then you should use something like an LM317 to drop the voltage.

[Captain Slacker]

how would i set up a relay for the motor?

[MAldridge]

http://www.instructables.com/id/Conn...ay-to-Arduino/

the relay uses a 12v coil, but the same steps apply to using a 9v one

[kalfuswi]

Here the code you could use:

/***********
connect an NPN transistor driving a motor to pin 9 on arduino
***********/

int motorPin = 9;

void setup() {
pinMode(motorPin, OUTPUT);
delay(45000);
digitalWrite(9, HIGH);
delay(1000);
digtalWrite(9, LOW);
}

void loop() {
}