Fez domino using the dfrobot digital vibration senor

RobcMays · November 4, 2011, 9:29am

Hi All

I was wondering if anyone has used the following sensor with the fez domino and how it needs to be wired and used?

http://www.dfrobot.com/wiki/index.php?title=DFRobot_Digital_Vibration_Sensor_(SKU:DFR0027)

I was hoping to be able to create it as a digital input pin and read the value, but I don’t think i have it connected correctly. I was hoping to directly check its value as and when i want, rather than use an event.

Any help on this would be great.

Rob

Gus_Issa · November 4, 2011, 10:00am

t should work but you need to swap couple wires as dfrobot pinout is slightly different than what we have here.

RobcMays · November 4, 2011, 10:21am

Hi Gus

Would you be able to confirm this wiring difference please?
I am not expereinced in the hardware side.

Also, what would i use to create the reference?
Would declaring an input port be the correct one to use and what would i use as the resistormode and interruptmode?

I also have the Fez Connect shield, but have run out of the white digital sockets.
Am I able to use either of the two ones for the servo?

Many Thanks

Rob

Gus_Issa · November 4, 2011, 10:42am

Yes use the servo ones. Look at schematics to see where the pins are http://www.ghielectronics.com/downloads/FEZ/Shield/FEZ_Connect_sch.pdf

RobcMays · November 4, 2011, 10:46am

Hi Gus

I was wondering what the code to use for this.
Can i just use an inputport?
On the sensor the connections are

Input
5V
GND

On the Connect Shield
gnd
sig
+5v

I take it that gnd = gnd, 5v to 5v and input to sig?

Thanks

Rob

Gus_Issa · November 4, 2011, 12:19pm

input=sig correct.

RobcMays · November 4, 2011, 1:22pm

Hi Gus

I dont seem to be able to determine if it is picking up vibrations of not.

Rob

Mike · November 4, 2011, 2:10pm

If you plugged a normal JST cable between the sensor and the connect shield, then you put -5V on the output of the sensor. Hopefully, that did not destroy the sensor.

RobcMays · November 4, 2011, 5:22pm

Hi Mike

No I checked how the connector is wired and used an adjusted jst cable where they are correctly laid out

Rob

RobcMays · November 7, 2011, 5:51am

Hi

Would this be used as simply as creating an inputport and go from there?
Or is it a little more complicated than that?

Rob

Brett · November 7, 2011, 2:40pm

If you look at the website [url]http://www.dfrobot.com/wiki/index.php?title=DFRobot_Digital_Vibration_Sensor_(SKU:DFR0027)[/url] you can see that the example they use uses interrupts on arduino pin 3. When the sensor senses vibration it triggers this - in their case they detect the falling edge. So really there’s not much more to this than an input port - simplistically to prove you sense things you could poll the value and when you see it change flash a LED or something.