Hi!

Hi!

I am referring to the two metal pieces next to the compass sensors,
which I can see on your picture.

Best Regards

There is nothing at the compass. the metal pieces are used as holders for the referees. In our videos
you will see it.

Tobias

Oops, sorry my bad, I didn't see the back side of the holder.
Anyways thanks for all your help, I hope I will be able to meet you guys at Robocup!

Best Regards
 
John

Hi!

I am referring to the two metal pieces next to the compass sensors,
which I can see on your picture.

Best Regards

Hi!

One last thing, I saw you used some-sort of metal to shield the compass sensor.
What is it? And where can you buy it?
I have been experimenting with mu-metal, is it that?

Thanks

Best Regards

Hi!

Could you send me the sizes of that pipe?
I have been trying to use heat-shrink tubing, but it doesn't work that good.
I am in the team Jakrobotics, previously we were called Hunrobot.
But we didn't attend Robocup2012.
So are you guys going with a Small size league team?

Regards

Amazing!

I am also a Robocup junior soccer competitor!
And I love that the you put up everything to be open source, if only there were more teams like you!
I am planning on going to robocup2013 in holland, will you guys be participating this year?
Anyways, I hopefully will do the same with my robot once it's done.
One question, you said you used the TSOP1140?
I am currently experimenting with the TSOP1138, but I am having tons of trouble with the viewing angles.
Did you use anything to shield the sensors viewing angle?
Also, what kind of components did you use for the light barrier?

Best Regards

Hi!

I am a Robocup Junior soccerhttp://rcj.robocup.org/soccer.html competitor,
 and I am currently in the process of selecting my ball sensor.
Now I found this article :
http://rcj.robocup.org/rcj2009/newball/cheapRCJ05sensors-RobotDemos09.pdf
And I ordered the TSOP1138 and connected it as the circuit in the document says I should with
a 100k resistor and a 1uF cap to get an analog reading.
The code I used is the Analog Serial Read example code

Code:

void setup() {
  Serial.begin(9600);
}

void loop() {
  int sensorValue = analogRead(A0);
  Serial.println(sensorValue);
}

And I am not getting any readings back besides 0.
So I did some further research and it turns out the ball actually outputs 40 khz instead of 38 which the sensor is set at,
but I should get at least some readings right even with the 2khz difference?
And also I don't suppose it's an issue but the capacitor I have is 1uf and 16v, would that be an issue?
Any advise appreciated, or if any one could suggest a better ball sensor!

Best Regards

I recently tried to use this:
http://arduinoprojects101.com/arduino-rpm-counter-tachometer/
But it doesn't seem to be working.
I used the Infrared Emitter and Detector from Radioshack:
http://www.radioshack.com/product/index.jsp?productId=2049723
would that be an issue?
Any suggestions?

I think you mean '< 1'  or possibly '== 0'.

OK I tired both but I'm not even using that function, all I want is the distance not the light value.
What else should I try?

So yeah, I can't figure out why, but i hooked it up according to this:
http://arduino.cc/playground/Main/SonarSrf08
and this is the code :

Code:

   

    #include <Wire.h>

     

    #define srfAddress 0x70                           // Address of the SRF08

    #define cmdByte 0x00                              // Command byte

    #define lightByte 0x01                            // Byte to read light sensor

    #define rangeByte 0x02                            // Byte for start of ranging data

     

    void setup(){

      Wire.begin();                                   // Initialize the I2C bus

      Serial.begin(115200);                           // Initialize the serial connection

      delay(100);                                     // Waits to make sure everything is powered up before sending or receiving data

    }

     

    void loop(){

      //int rangeData = getSoft();                     // Calls a function to get software version

      int rangeData = getRange();                      // Calls a function to get the range data

      int lightData = getLight();                      // Calls a function to get the light data

     

      Serial.print("Range: ");

      Serial.print(rangeData);

      Serial.println("cm");

     

      Serial.print("Light: ");

      Serial.print(lightData);

      Serial.println("");

     

      delay(100);                                      // Wait before looping

    }

     

    int getRange(){                                   // This function gets a ranging from the SRF08

      int range = 0;

     

      Wire.beginTransmission(srfAddress);             // Start communicating with SRF08

      Wire.write((byte)cmdByte);                             // Send Command Byte

      Wire.write(0x51);                                // Send 0x51 to start a ranging in cm

      Wire.endTransmission();

     

      delay(100);                                     // Wait for ranging to be complete

     

      Wire.beginTransmission(srfAddress);             // start communicating with SRFmodule

      Wire.write(rangeByte);                           // Call the register for start of ranging data

      Wire.endTransmission();

     

      Wire.requestFrom(srfAddress, 2);                // Request 2 bytes from SRF module

      while(Wire.available() < 2);                    // Wait for data to arrive

      byte highByte = Wire.read();                 // Get high byte

      byte lowByte = Wire.read();                  // Get low byte

     

      range = (highByte << 8) + lowByte;              // Put them together

     

      return(range);                                  // Returns Range

    }

     

    int getLight() {                                  // Function to get light reading

      Wire.beginTransmission(srfAddress);

      Wire.write(lightByte);                           // Call register to get light reading

      Wire.endTransmission();

     

      Wire.requestFrom(srfAddress, 1);                // Request 1 byte

      while(Wire.available() < 0);                    // While byte available

      int lightRead = Wire.read();                 // Get light reading

     

      return(lightRead);                              // Returns lightRead

     

    }

     

    int getSoft(){                                    // Function to get software revision

     

      Wire.beginTransmission(srfAddress);             // Begin communication with the SRF module

      Wire.write((byte)cmdByte);                             // Sends the command bit, when this bit is read it returns the software revision

      Wire.endTransmission();

     

      Wire.requestFrom(srfAddress, 1);                // Request 1 byte

      while(Wire.available() < 0);                    // While byte available

      int software = Wire.read();                  // Get byte

     

      return(software);                               

     

    }

It blinks on start up then nothing if I enter the Serial monitor.
Any ideas?

Could you tell us what kind of ultrasonic sensor you are using?
That way we can give better advise.

Regards
Jak24

well all you need is 9 more h-bridges(motor controllers) and your set 
Unless the motors are VERY small and consume very little current, the you need 1 extra h-bridge for each 2 motors you connect,
and also make sure you use a power supply that can handle the current.

Regards

Jak24

http://www.societyofrobots.com/step_by_step_robot.shtml 
50 $ robot tutorial,
simplest platform,
good to start with


Jak24

Any ideas????
or at least point me at some-kind of tutorial for controlling BLDC motors
Regards

Jak24

Hi!

I am trying to control four Brushless three phase motors.
All i need is to control the direction and speed of these motors.
The IC that seems to be the most common is the L6235:
http://www.datasheetcatalog.org/datasheet2/9/0ol725wx0154d5udifhhd1ugx33y.pdf
but this chip can only handle 2.8 A and even though there is a part were it says:

Over current Protection

were it explains how to use it for bigger current, but even if it were to work i don't really think it's a 100% safe and efficient.
and also there is an image (Figure 22.)  which shows that that it can only handle 10W max while my motor is 15W.
So my question is does anyone know of an IC which can control the speed and direction of a  Brushless three phase dc motor
which is not to expensive, and is not SMT (as my soldering skills are that good)

Thanks

Regards
Jak24

Hi!

Are there any examples for this sensor with arduino ?
http://www.sparkfun.com/products/9810
if there aren't could some one point me in the right direction or post some example code.

Thanks
Regards

Jak24