Hi,
I am an Master in Interior design Student and I am working on an Interactive art Installation project as my master's final project.
Can anyone help me out with the Code.
I am using PIR Sensor to activate and de-active the interactivity. Arduino UNO and PWM servo driver to control 9 servo motors. I want to create random servo movements when PIR sensor detacts "HIGH" and servo back to 0 position when PIR Sensor detacts "Low"
Servos are in grid on 3X3
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The 'random()' function will let you generate pseudo-random numbers:
Pick random numbers within the range of positions you want for your servos and send those positions to the servos.
When you want them to go to 0, send 0 to the servos.
Well, it looks fun and it's very easy.
Do you already have the materials? The most important thing is the power source, and for that: how much weight do the servos have to move?
Do you already have an idea of how to interconnect everything? Upload what you have materials, electrical scheme and code.
Yes, I have all the material as per my limited knowledge.
Servo Motor's
PWM Servo Driver
Arduino Uno R3
External Power Supply (5v-6A)
Breadboard
PIR Sensor
Jumper Wires.
Based on Numberous videos I saw on Youtube I have connected proper in the right manner.
What I am struggling with is to find the right code.
Right now I am trying to control 9 servos without PWM Servo driver using external power supple to power servo using breadboard and connecting signal wire to arduino and the problem I am facing is that jumper wires are getting hot .
Each one of those plastic geared servos wants up to 1A each (800mA). A breadboard cannot handle 9 amps of current, as a note.
Which wires are getting hot?
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What does this mean:
?
"Right now I am trying to control 9 servos without PWM Servo driver" Mean I have attached all the servo's Power and Ground wire to 5V power supple using breadboard and attached the signal wire of all 9 servos to arduino board.
Code that I have right now somthing like this:
#include <Wire.h>
#include <Adafruit_PWMServoDriver.h>
// called this way, it uses the default address 0x40
Adafruit_PWMServoDriver pwm = Adafruit_PWMServoDriver();
#define SERVOMIN 150 // this is the 'minimum' pulse length count (out of 4096)
#define SERVOMAX 600 // this is the 'maximum' pulse length count (out of 4096)
uint8_t servonum = 9;
void setup() {
Serial.begin(9600);
Serial.println("16 channel Servo test!");
pwm.begin();
pwm.setPWMFreq(60); // Analog servos run at ~60 Hz updates
}
void loop() {
// Drive each servo one at a time
Serial.println(servonum);
for (uint16_t pulselen = SERVOMIN; pulselen < SERVOMAX; pulselen++) {
pwm.setPWM(servonum, 0, pulselen);
}
delay(500);
for (uint16_t pulselen = SERVOMAX; pulselen > SERVOMIN; pulselen--) {
pwm.setPWM(servonum, 0, pulselen);
}
delay(500);
servonum ++;
if (servonum > 9) servonum = 0;
}
In Image bellow, circle marked are the wires thats getting hot. I have also attached the photos of power supple that I am using to power arduino.
Those wires are too small. The power supply only gives 6 Amps, it is too small. The breadboard cannot handle 6 amps. With a switching power supply, you might want to add a filtering caps.
Can you share a specification of what type of filtering caps do i need to use? Link or Image Perhaps.
Yes. But that will NOT solve the issue.
So what can be the solution? 
I build my own servo power supply boards.
You could use screw terminal blocks to distribute power and some larger sized wires.
Get a power supply that can output at least 9 Amps. And do not use a solderless breadboard for the wiring. Also use thicker wire.
See:-
http://wiresizecalculator.net/wiresizechart.htm
For how thick.
I see that you have been well advised, follow the advice of colleagues, just a few points regarding the power supply:
And as for the code. Does that code as you have put it move you something? Well nothing for me, in fact not even the untouched examples of that library moves my servos.
I know why that code does not work. That code is for that servo expander board that you see at the bottom of the picture the PCA9685 .
If you are going to drive the servos directly with arduino try this other code:
#include <Servo.h>
#define pir 2
Servo servo1;
Servo servo2;
Servo servo3;
Servo servo4;
Servo servo5;
Servo servo6;
Servo servo7;
Servo servo8;
Servo servo9;
void setup() {
servo1.attach(3);
servo2.attach(4);
servo3.attach(5);
servo4.attach(6);
servo5.attach(7);
servo6.attach(8);
servo7.attach(9);
servo8.attach(10);
servo9.attach(11);
pinMode (2, INPUT);
randomSeed(analogRead(A0));
}
void loop() {
if (digitalRead (pir) == HIGH) {
servo1.write(random (0, 181));
servo2.write(random (0, 181));
servo3.write(random (0, 181));
servo4.write(random (0, 181));
servo5.write(random (0, 181));
servo6.write(random (0, 181));
servo7.write(random (0, 181));
servo8.write(random (0, 181));
servo8.write(random (0, 181));
while(digitalRead (pir) == HIGH);
servo1.write(0);
servo2.write(0);
servo3.write(0);
servo4.write(0);
servo5.write(0);
servo6.write(0);
servo7.write(0);
servo8.write(0);
servo8.write(0);
}
}
This the code that i have tested for now for 3 servos. Can someone help me to have randome movement with 9 servos?
#include <Servo.h>
Servo myservo1;
Servo myservo2;
Servo myservo3;
int led=3;
int pir=2;
void setup()
{
pinMode(pir,INPUT);
pinMode(led,OUTPUT);
myservo1.attach(5);
myservo2.attach(7);
myservo3.attach(8);
Serial.begin(9600);
}
void loop()
{
int val = digitalRead(pir);
Serial.println(val);
if(val==HIGH){
digitalWrite(led,HIGH);
myservo1.write(180);
myservo2.write(180);
myservo3.write(180);
delay(250);
myservo1.write(0);
myservo2.write(0);
myservo3.write(0);
}
else{
digitalWrite(led,LOW);
myservo1.write(0);
myservo2.write(0);
myservo3.write(0);
}
delay(500);
}
Replace the 180 with calls to the random function that you were pointed out to you by post #3
Have you tried the code from post #16?
And in the circuit of post#17, it is necessary to connect the GND of the arduino with the GND of the batteries.
Setup is working fine without connecting arduino ground to tha batteries. but i am new to this thing and if u say so, ill attach ground wire or arduino to the batteris. 
Thanks
