I tried but not much of luck. I live in high density area, so I will try to go someplace else and try.

Also, any idea of how to build an antena. A simple wire would do? Any specific length?

Hi

I am using the sample code for the gps-tinyshield (TinyShield_GPS.ino)

It seems that the GPS is recognized but the output it is only *'s.

Sats HDOP Latitude  Longitude  Fix  Date       Time     Date Alt    Course Speed Card  Distance Course Card  Chars Sentences Checksum
          (deg)     (deg)      Age                      Age  (m)    --- from GPS ----  ---- to London  ----  RX    RX        Fail
-------------------------------------------------------------------------------------------------------------------------------------
**** **** ********* ********** **** ********** ******** **** ****** ****** ***** ***   *******  ****** ***   63    0         0 

I changed the bauds to 4800 and 9600 and same output.

Any idea of what else I need to change?

Thanks

That's why I imagined.

I will check out the links, thanks.
as

Hi

One last question, what's the value of the resistance?

To be sure that I did it correctly I measured it and it gave me like open circuit. Is that correct?

/as

Another question.

How do I get the maximum current/voltage to the motors?

If I use 65535 the power goes to -1 as it seems that the int maxPWM variable is signed, then the maximum that I can get is 32768 or -32768.

I tried to change maxPWM to be a longint but the result is the same.

Any ideas of how I can get more current to my motors?

.as

Hi

I need to use 2  Dual Motor TinyShield boards. According to the docs I need to remove a resistor in one of the boards (i.e. R1) The resistors are tiny and I do not wan to damage the board. Is this correct?

Also, how should I declare the motors in the second board, something like:

MotorDriver motor(0);
MotorDriver motor1(1);

// Motor1 board 0
motor.setMotor(1,i);
// Motor2 board 0
motor.setMotor(2,i);
// Motor1 board 1
motor1.setMotor(1,i);
// Motor2 board 1
motor1.setMotor(2,i);

Thanks

Hi

I added a 5 ohm resistor and it work very well.

I tried a 1.5 ohm but the current was still to high.

Now my issues is to use 2 Dual-motors board, but I will start another thread.

Ben

Thanks for the reply, it makes a lot of sense.

About the motors, yes, I could try to get some new ones with more inductance.

As a workaround meanwhile, do you think that dropping a resistance of 2 ohms in series with the motor would do the trick?

Regards

Ben

I am using motors that I took from a small/medium drone, like these ones.

http://www.newegg.com/Product/Product.aspx?Item=9SIA4P03S81810&nm_mc=KNC-GoogleMKP-PC&cm_mmc=KNC-GoogleMKP-PC-_-pla-_-App+Enabled+Products-_-9SIA4P03S81810&gclid=CjwKEAiAmNW2BRDL4KqS3vmqgUESJABiiwDTM9LoUN2OgXk1lfwQvdLXSVVC-nU6wCx4VshNR3U10xoClYXw_wcB&gclsrc=aw.ds

The battery is the same that came with the drone, it is a Li-Po 500mA and 3.7v .

The resistance of the motors is 1.7 - 1.8 ohms.

thanks

Hi

I am trying to use a motor with the Dual Motor TinyShield but the motor just buzzes.

The code (I took the simple example) looks ok as I measure the voltage and it increases as it supposes.

The battery that I am using also looks that gives the correct amount of current as if I connect the motor directly it rotates without any problem.

It looks that the board is not providing the enough current to the motors but I do not understand why.

Any ideas?

Thanks
as