Roboduino (Nano) & IO Shield + Motor

Forum 2005-2010 (read only) Hardware Interfacing
1

Hi All,

I have just received my new Arduino Nano and IO Shield,

I got it working and have tested the led using "blink" & also using wiring up a Potentiometer to control the Blinking led.

OK, What i really want to do is Control Servos & Motors.

My Servos are in transit, but i have loads of DC Motors lying around and wanted to turn them on & off using the arduino.

On my Shield i have 5V & GND on each of my Digital I/O's as-well as the analog inputs.

But how do i connect it and code it?

I assumed it would be easy for a n00b to find wiring diagrams and examples for arduino projects but i haven't had any luck yet with simple motors!!

I found one on instructables but all the motor did was wine (make a high pitched noise)

Can anyone point me in the right direction!!

Thanks in advance

2

Ok, figured out why some of my motors wont work!!

DUH,

It turns out the the arduino only puts out 3.3v DC [smiley=lolk.gif]

I thought that the arduino would at least put out 5 v DC. :o

I have a Motor that is rated at 5vis there a way to get 5 volts out of the arduino without an additional supply?

I do have 12v wall warts but don't want to fry the motor?, I was even thinking about stripping the end of a USB Lead ad plugging it into the IO shield!

any suggestions?

this is the code in using:

/*
 * A simple PWM example
 */

int pin         =  6;     // LED connected to PWM pin 11
int pulsewidth  =  255;    // Any value between 0 and 255

void setup() {
  // None required for analogWrite!
}

void loop() {
  analogWrite(pin, pulsewidth);
}

I have been testing it with a 3.3v motor and a Torch LED to look at the voltage output

Cheers

3

Some Arduinos are 5V. Others, like the nano, are 3.3V.

A regulator, a couple of capacitors, and a diode can be had for under $1. Build a regulated power supply to take the 12V wall wart power down to 5V in under 10 minutes.

What IO shield do you have. I didn't think there were shields for the nano?

4

Thanks for the response!!

The Roboduino IO Shield!!

Here is a page link,
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=130349277518&ssPageName=STRK:MEWNX:IT