Robotics · community

Robotics Builds

Line followers, sumo bots, rovers — show us what moves.

8
Members: 3
Builds

3 builds

Sort

swekar pokharel
swekar pokharelMaker
@swekar
Robotics Builds
"Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?"
Oct 8

Aarav KarkiMember

@aarav_builds

Robotics Builds

Three weeks of tuning and my line follower finally does the full track without leaving it once. The trick was dropping the base speed before the sharp turns instead of trying to fix it with a bigger correction. #robotics #linefollower #arduino

arduino

// PID line following — the values that finally worked for me
const float Kp = 0.08, Ki = 0.0002, Kd = 0.9;
int baseSpeed = 140;          // was 200 — too fast for the hairpin

void loop() {
  int error = readLinePosition() - 3500;   // 0..7000, centre = 3500
  integral += error;
  int correction = Kp * error + Ki * integral + Kd * (error - lastError);
  lastError = error;

  // Slow down when we are far off the line; speed up on the straights.
  int speed = baseSpeed - min(abs(error) / 40, 60);
  setMotors(speed + correction, speed - correction);
}

Anish Gurung
Anish GurungMember
@mentor_anish
Robotics Builds
A reminder for everyone starting a sumo bot this month: weigh your chassis before you fall in love with it. The 500g limit includes the battery, and metal chassis plus 18650s is usually already over. Measure early, redesign cheaply. #sumo #robotics #competition
Oct 2