servomotor (arduino)

You only mention one sensor but you have it monitoring for someone within 50cm and also monitoring the servos, are you using 2 sensors ?

or is the sensor monitoring for people close to it, If detected it starts the servos (4 with their own actions), but if the person / object moves out of range of the sensor the servos will stop what ever there doing and wait for a new presence to be detected by the sensor

the ultrasonic sensor (and servos) are attached to the wall. when a person approaches 50 cm or less, servos start in march.

Yes, the sensor is monitoring for people close to it, If detected it starts the servos (4 with their own actions), but if the person moves out of range of the sensor the servos will stop what ever there doing and wait for a new presence to be detected by the sensor.

Le 6 oct. 2014 à 20:54, peteroakes <messages@element14.com> a écrit :

You only mention one sensor but you have it monitoring for someone within 50cm and also monitoring the servos, are you using 2 sensors ?

 

or is the sensor monitoring for people close to it, If detected it starts the servos (4 with their own actions), but if the person / object moves out of range of the sensor the servos will stop what ever there doing and wait for a new presence to be detected by the sensor

Try this, attach the futaba servo to pin 10 and the tower pro to pin 9. Make sure analogue pin 0 is NOT connected to anything, it is required to set up the random number generator. If you need the code modifying or it doesn't work, please post.

Wonderful !

For the other two servo I place on pin 7 and 8 or 11 and 12 ?

For supply of servos I plug how?

Again thank you.

I Would suggest you use a separate 5v for the servo power, the arduino regulator will not be happy driving 4 servos

Connect the servo +v pins to the power supply

connect the ground (0v) of the servo supply to the gnd pin on the arduino,

connect the 0v of the servo supply to all the servos

the pwm pins are connected as indicated above

THat at should get you running nice and reliably

Oh, sorry, I made a mistake, I thought you only had 2 servos. Please just tell me how many of each type of servo you have so I can alter the progran accordingly. I agree that you should be using an external PSU for that many servos. Also, a quick request, when we get this working could you please post a video, I really want to see this cool piece of art that you have made.

Thank You.

I have either a battery of 4 x 1.5 V or an AC / DC power adapter, model TSL-0901, output 9V DC 1000mA.
Which is best ?

For now I have 2 Tower Pro servos and 2 Futaba servos (Do you know larger models at a reasonable price?).
For now I'm trying to solve the practical and technical problem. I attack the artistic part in January. Once the installation is finished I will post a photo or video (how?).

#define echoPin 12 
#define trigPin 13 
#include <Servo.h>  
Servo towerpro; 
Servo futaba;
Servo towerpro2; 
Servo futaba2; 
void setup() { 
  Serial.begin (9600); 
  pinMode(trigPin, OUTPUT); 
  pinMode(echoPin, INPUT); 
   
  towerpro.attach(9); 
  futaba.attach(11);
  towerpro2.attach(10); 
  futaba2.attach(12);  
  towerpro.write(90); 
  futaba.write(30);
  towerpro2.write(90); 
  futaba2.write(30);  
  randomSeed(analogRead(0)); 
} 
 
void loop() { 
start: 
  long duration, distance; 
  digitalWrite(trigPin, LOW);  // Added this line 
  delayMicroseconds(2); // Added this line 
  digitalWrite(trigPin, HIGH); 
//  delayMicroseconds(1000); - Removed this line 
  delayMicroseconds(10); // Added this line 
  digitalWrite(trigPin, LOW); 
  duration = pulseIn(echoPin, HIGH); 
  distance = (duration/2) / 29.1; 
  if (distance < 20) {  // Change value 20 to change trigger distance 
    goto start; 
} 
 
  if (distance >= 200 || distance <= 0){ 
    Serial.println("Out of range"); 
  } 
  else { 
    Serial.print(distance); 
    Serial.println(" cm"); 
  } 
  delay(100); 
  towerpro.write(random(0,180)); 
  futaba.write(random(0,60));
  towerpro2.write(random(0,180)); 
  futaba2.write(random(0,60));  
  delay(random(250,2000)); 
} 

Ok, all your servos should now work. The tower pro servos go to pins 9 and 10 and the futaba servos to pins 11 and 12. As for power, I recommend a high power usb charger or even a pc psu. If you cut open a usb cable then the red wire is power and the black wire ground. Make sure you do not use tis on a pc as it will require too much power and may damage your usb ports. For testing purposes you might be able to use the Arduino to supply power if you only hook up 1 servo at a time.

message d'Arduino :

sketch_oct23a:49: error: redefinition of 'Servo towerpro'

sketch_oct23a:4: error: 'Servo towerpro' previously declared here

sketch_oct23a:50: error: redefinition of 'Servo futaba'

sketch_oct23a:5: error: 'Servo futaba' previously declared here

sketch_oct23a.ino: In function 'void setup()':

sketch_oct23a:53: error: redefinition of 'void setup()'

sketch_oct23a:6: error: 'void setup()' previously defined here

9V will be too high for the servos probably so unless you have a DC-DC converter or a 5V regulator it may be better to go with the 4*1.5V batteries

Regards

Peter

9V will be too high for the servos probably so unless you have a DC-DC converter or a 5V regulator it may be better to go with the 4*1.5V batteries

Regards

Peter