Mindboards

nxtboy

Does this work?

int TEMP = 2;

int add(int x, int y, int &d_result = TEMP){
  d_result = (x+y)*2;
  return d_result/2;
}

If not, http://stackoverflow.com/questions/1059 ... rence-in-c is relevant

nxtboy

The Electronics and Robotics recently graduated into a full-blown site, and in doing so, dropped the "Robotics" from its title. As a result, a merge is now irrelevant, so we should focus on the original proposal.

nxtboy

I so nearly got to try out that course as a pilot, but they refused me on grounds of me being a year too young.

nxtboy

I'm thinking of a kind of omniwheeled self balancing bot. Basically I want to place my robot on top of a football. It should be able to maintain it's position without falling of. Kinda an inverse of xkcd #413 , right? I do have an accelerometer that measures over three axes. Can this be used in a s...

nxtboy

Don't forget my Pacman!

nxtboy

Is this within a RIC file?

If not, just use trigonometry!

I'm a getting bit shaky with my NXC now, so here's some pseudo-code:

Code: Select all

int xCenter = 50;
int yCenter = 32;
int radius = 20;
float angle = Pi/6 * hour;
drawLine(xCenter, yCenter, xCenter + radius * sin(angle), yCenter + radius * cos(angle));

nxtboy

Ooh, I really need to get hold of some of those so that I can replace the wheels from http://holonomicwheel.com on my Robocup Junior robots Â¹. We had a lot of problems with traction last time, and the wheels tended to jitter. How hard do you reckon it would be to modify the inset so that the wheels...

nxtboy

Presumably that means that the pullup resistors can't be the cause of the problem? Actually, it means that it is all the more likely to be the cause of your sensor fate, because the resistors were in parallel, so the values combined would be less than 2.2k, which is yet even lower. Oh yeah, good po...

nxtboy

Also, you noted that you used 2k2 pullups. Why such low values? The NXT uses 82k, and unless you are going into insane speeds, 10k should be the lowest value you will ever need (for non NXT stuff). If you really did mess up (or "burn out") the sensor, it is likely because the pullups are ...

nxtboy

according to the colors and voltages, maybe this could help: Pins-and colors : (danke an sebi!) Sensor: Pin1 White ANA Analog Pin2 Black GND (-) Pin3 Red GND (-) pin4 Green +4,3V Pin5 Yellow SCL (digital, IÂ²C: Serial CLock Line) Pin6 Blue SDA (digital, IÂ²C: Serial DAta Line) Motor: Pin1 White Mot...

Mindboards

Search found 29 matches

Re: Optional function parameters

"Electronics and Robotics" has dropped "Robotics"

Re: Extremely cool course at University of Cambridge

Re: Omni-wheel balancing robot

Re: NXT Games

Re: Displaying an analog clock

Re: All New Rotacaster's Omni-wheels to Test Drive!

Re: Using the ultrasonic sensor with other controllers

Re: Using the ultrasonic sensor with other controllers

Re: Using the ultrasonic sensor with other controllers