My P1 Themed Predator Costume with Electronics and Sounds. (Pic Heavy)
- Thread starter MoeSizzlac
- Start date
ksj
Well-Known Member
Check out my youtube which linked on that video. I have other videos there already so you might get what you are looking for.
camco
New Member
I’m working on the electrical part of my build currently. Have the board connected to cannon and servos. My issue is it’s fine turning head left and right but when i tilt head down gun goes up and when head up gun goes down. Any ideas how to fix this? Or what code part to edit to reverse the signal for #6 servo connection?
ksj
Well-Known Member
What you need to do is do a remap routine.
For arduino you use the map function
Arduino map - map a value from one range to another
Arduino map is a useful function but it may not do what you expect! Find out here why it may go wrong and how to use it correctly.
www.best-microcontroller-projects.com
for python I documented how I used a value remap here:
The basic remap formula is: new value = ((old value - old min)/(old max - old min))*(new max-new min) + new min
The Aliens Legacy • View topic - Wiimote with nunchuk on linux via bluetooth (Xeno/Pred)
The Aliens Legacy is a global community for fans of the Alien film series. The discussion of the Alien series of films and the props used in them is the aim, but if it's got Big Bugs and Big Guns, then they are welcome too!
forum.alienslegacy.com
camco
New Member
Forgot to mention I have 0 knowledge with using arduino. I got the code on following simple copy and paste.What you need to do is do a remap routine.
For arduino you use the map function
Arduino map - map a value from one range to another
Arduino map is a useful function but it may not do what you expect! Find out here why it may go wrong and how to use it correctly.www.best-microcontroller-projects.com
for python I documented how I used a value remap here:
The basic remap formula is: new value = ((old value - old min)/(old max - old min))*(new max-new min) + new min
The Aliens Legacy • View topic - Wiimote with nunchuk on linux via bluetooth (Xeno/Pred)
The Aliens Legacy is a global community for fans of the Alien film series. The discussion of the Alien series of films and the props used in them is the aim, but if it's got Big Bugs and Big Guns, then they are welcome too!
Happen to know of a copy paste kind of code with the channel 6 already reversed?
ksj
Well-Known Member
no not really. Your other option is to flip the servo install location by 180 degrees...
camco
New Member
Actually I did this How to reverse a servo without a radio
And it now works for if anyone else has a similar issue.
ksj
Well-Known Member
For python something like this might work:
stackoverflow.com
For arduino just use the map command?
map(input, old min, old max, new min, new max)
in your case to reverse it would be
map(input, old min, old max, new max, new min)
Convert a number range to another range, maintaining ratio
I'm trying to convert one range of numbers to another, maintaining ratio. Maths is not my strong point. I have an image file where point values may range from -16000.00 to 16000.00 though the typi...
stackoverflow.com
For arduino just use the map command?
map(input, old min, old max, new min, new max)
in your case to reverse it would be
map(input, old min, old max, new max, new min)
ksj
Well-Known Member
Ok I worked on it a little bit more. So, PWM signal range is 0-2300 typically. It varies based on many factors.
So i thought why not an if and elseif statement:
if (val > max/2)
val1 = max - val
elseif(val< max/2)
val1 = max - val
So this yielded that the simple solution was to do a recalibration of:
value1 = maxiumum value - original value
So using that equation should be simple to flip things.
For example
0 950 1150 1350 2300
value of 950 remaps to 1350 by taking 2300 - 950 = 1350
and conversely value of 1350 remaps to 950 by taking 2300 - 1350 = 950
Now the kicker is if your end value ends up being out of range you may need to adjust the numbers used.
So i thought why not an if and elseif statement:
if (val > max/2)
val1 = max - val
elseif(val< max/2)
val1 = max - val
So this yielded that the simple solution was to do a recalibration of:
value1 = maxiumum value - original value
So using that equation should be simple to flip things.
For example
0 950 1150 1350 2300
value of 950 remaps to 1350 by taking 2300 - 950 = 1350
and conversely value of 1350 remaps to 950 by taking 2300 - 1350 = 950
Now the kicker is if your end value ends up being out of range you may need to adjust the numbers used.
ksj
Well-Known Member
Well sometimes that is not an option
MoeSizzlac
Active Member
Sorry for the last responses, work has me busier than a bee.
Here are some 3D pics of the servos. The servos are MG996.
The flashlight is hard wired from the canon to a cat 6 that connects to the gauntlet to 2 switches. One is a double momentary switch (pictured below) that hits 2 buttons at once (one to flash the light, one to make the plasma sound):
I also have a seperate power supply going to the flashlight controlled by a latching switch. That's the large one on the right. The latching bypasses the momentary button and sends juice seperately to the flashlight.
Here are some 3D pics of the servos. The servos are MG996.
The flashlight is hard wired from the canon to a cat 6 that connects to the gauntlet to 2 switches. One is a double momentary switch (pictured below) that hits 2 buttons at once (one to flash the light, one to make the plasma sound):
I also have a seperate power supply going to the flashlight controlled by a latching switch. That's the large one on the right. The latching bypasses the momentary button and sends juice seperately to the flashlight.
Below is my Arduino ini. Compare it to yours and you may see the issue.
#include<Wire.h>
#include<Servo.h>
const int MPU_addr=0x68; // I2C address of the MPU-6050
int16_t GyX,GyY,GyZ,AcX,AcY,AcZ,Tmp;
int xOffset = 0;
int yOffset = 0;
int zOffset = 0;
int i = 0;
long X = 0;
long Y = 0;
long Z = 0;
unsigned long previousMillis = 0;
unsigned long currentMillis = millis();
const long interval = 10;
unsigned long TIMERpreviousMillis = 0;
unsigned long TIMERcurrentMillis = millis();
const long TIMERinterval = 1;
int resetButtonPin = 12;
int horizontalPosition = 90;
int verticalPosition = 90;
int sideTiltPosition = 90;
int buttonCurrent = 0;
int buttonPrevious = 0;
unsigned char buttonHistory = 0;
int test = 0;
Servo horizontalServo;
Servo verticalServo;
Servo sideTiltServo;
void setup()
{
Serial.begin(9600);
gyroSetup();
}
void loop()
{
headTracking();
}
void GetCalibrationData()
{
int i = 0;
long xCal = 0;
long yCal = 0;
long zCal = 0;
Serial.println("Calculating Gyro Offset Values...");
while(i < 1000)
{
Wire.beginTransmission(MPU_addr);
Wire.write(0x3B); // starting with register 0x3B (ACCEL_XOUT_H)
Wire.endTransmission(false);
Wire.requestFrom(MPU_addr,14,true); // request a total of 14 registers
AcX=Wire.read()<<8|Wire.read(); // 0x3B (ACCEL_XOUT_H) & 0x3C (ACCEL_XOUT_L)
AcY=Wire.read()<<8|Wire.read(); // 0x3D (ACCEL_YOUT_H) & 0x3E (ACCEL_YOUT_L)
AcZ=Wire.read()<<8|Wire.read(); // 0x3F (ACCEL_ZOUT_H) & 0x40 (ACCEL_ZOUT_L)
Tmp=Wire.read()<<8|Wire.read(); // 0x41 (TEMP_OUT_H) & 0x42 (TEMP_OUT_L)
GyX=Wire.read()<<8|Wire.read(); // 0x43 (GYRO_XOUT_H) & 0x44 (GYRO_XOUT_L)
GyY=Wire.read()<<8|Wire.read(); // 0x45 (GYRO_YOUT_H) & 0x46 (GYRO_YOUT_L)
GyZ=Wire.read()<<8|Wire.read(); // 0x47 (GYRO_ZOUT_H) & 0x48 (GYRO_ZOUT_L)
xCal = xCal + GyX;
yCal = yCal + GyY;
zCal = zCal + GyZ;
i = i + 1;
}
xOffset = xCal/1000;
yOffset = yCal/1000;
zOffset = zCal/1000;
Serial.print("X Offset: ");
Serial.println(xOffset);
Serial.print("Y Offset: ");
Serial.println(yOffset);
Serial.print("Z Offset: ");
Serial.println(zOffset);
Serial.println("--------------------");
Serial.println();
delay(2500);
Serial.println("Ready");
digitalWrite(13,HIGH);
return;
}
void gyroSetup()
{
pinMode(resetButtonPin,INPUT);
pinMode(13,OUTPUT);
digitalWrite(13,LOW);
horizontalServo.attach(7);
horizontalServo.write(horizontalPosition);
delay(15);
verticalServo.attach(6);
verticalServo.write(verticalPosition);
delay(15);
sideTiltServo.attach(5);
sideTiltServo.write(sideTiltPosition);
delay(15);
Serial.println("Initializing Gyroscope...");
Wire.begin();
Wire.beginTransmission(MPU_addr);
Wire.write(0x6B); // PWR_MGMT_1 register
Wire.write(0); // set to zero (wakes up the MPU-6050)
Wire.endTransmission(true);
Serial.println("Initialization Complete");
GetCalibrationData();
return;
}
void headTracking()
{
TIMERcurrentMillis = millis();
if (TIMERcurrentMillis - TIMERpreviousMillis >= TIMERinterval)
{
//reset timer
TIMERpreviousMillis = TIMERcurrentMillis;
buttonPrevious = buttonCurrent;
if(digitalRead(resetButtonPin) == HIGH)
{
buttonCurrent = 1;
}
else
{
buttonCurrent = 0;
}
buttonHistory = (buttonHistory << 1) | buttonCurrent;
if((buttonPrevious == 0)&&(buttonCurrent == 1))
{
test = 0;
}
}
if(test == 0)
{
if(buttonHistory == 0x0)
{
test = 1;
sideTiltPosition = 90;
sideTiltServo.write(sideTiltPosition);
verticalPosition = 90;
verticalServo.write(verticalPosition);
horizontalPosition = 90;
horizontalServo.write(horizontalPosition);
}
}
Wire.beginTransmission(MPU_addr);
Wire.write(0x43); // starting with register 0x43 (GYRO_XOUT_H)
Wire.endTransmission(false);
Wire.requestFrom(MPU_addr,14,true); // request a total of 6 registers
GyX=Wire.read()<<8|Wire.read(); // 0x43 (GYRO_XOUT_H) & 0x44 (GYRO_XOUT_L)
GyY=Wire.read()<<8|Wire.read(); // 0x45 (GYRO_YOUT_H) & 0x46 (GYRO_YOUT_L)
GyZ=Wire.read()<<8|Wire.read(); // 0x47 (GYRO_ZOUT_H) & 0x48 (GYRO_ZOUT_L)
GyX=(GyX-xOffset)/131;
GyY=(GyY-yOffset)/131;
GyZ=(GyZ-zOffset)/131;
X = X + GyX;
Y = Y + GyY;
Z = Z + GyZ;
i = i + 1;
currentMillis = millis();
if (currentMillis - previousMillis >= interval)
{
//take average
X = X/i;
Y = -Y/i;
Z = Z/i;
//multiply by 0.01 (ten milliseconds)
X = X*0.02;
Y = Y*0.02;
Z = Z*0.02;
//reset i
i = 0;
//reset timer
previousMillis = currentMillis;
//-------------------------------------------------------------------------------------
sideTiltPosition = sideTiltPosition + X;
if((sideTiltPosition <= 60) && (sideTiltPosition >= 0))
{
sideTiltServo.write(sideTiltPosition);
}
else if(sideTiltPosition > 60)
{
sideTiltPosition = 60;
}
else if(horizontalPosition < 0)
{
sideTiltPosition = 0;
}
//-------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------
verticalPosition = verticalPosition + Y;
if((verticalPosition <= 60) && (verticalPosition >= 0))
{
verticalServo.write(verticalPosition);
}
else if(verticalPosition > 60)
{
verticalPosition = 60;
}
else if(verticalPosition < 0)
{
verticalPosition = 0;
}
//-------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------
horizontalPosition = horizontalPosition + Z;
if((horizontalPosition <= 60) && (horizontalPosition >= 0))
{
horizontalServo.write(horizontalPosition);
}
else if(horizontalPosition > 60)
{
horizontalPosition = 60;
}
else if(horizontalPosition < 0)
{
horizontalPosition = 0;
}
//-------------------------------------------------------------------------------------
//reset averages
X = 0;
Y = 0;
Z = 0;
}
return;
}
#include<Servo.h>
const int MPU_addr=0x68; // I2C address of the MPU-6050
int16_t GyX,GyY,GyZ,AcX,AcY,AcZ,Tmp;
int xOffset = 0;
int yOffset = 0;
int zOffset = 0;
int i = 0;
long X = 0;
long Y = 0;
long Z = 0;
unsigned long previousMillis = 0;
unsigned long currentMillis = millis();
const long interval = 10;
unsigned long TIMERpreviousMillis = 0;
unsigned long TIMERcurrentMillis = millis();
const long TIMERinterval = 1;
int resetButtonPin = 12;
int horizontalPosition = 90;
int verticalPosition = 90;
int sideTiltPosition = 90;
int buttonCurrent = 0;
int buttonPrevious = 0;
unsigned char buttonHistory = 0;
int test = 0;
Servo horizontalServo;
Servo verticalServo;
Servo sideTiltServo;
void setup()
{
Serial.begin(9600);
gyroSetup();
}
void loop()
{
headTracking();
}
void GetCalibrationData()
{
int i = 0;
long xCal = 0;
long yCal = 0;
long zCal = 0;
Serial.println("Calculating Gyro Offset Values...");
while(i < 1000)
{
Wire.beginTransmission(MPU_addr);
Wire.write(0x3B); // starting with register 0x3B (ACCEL_XOUT_H)
Wire.endTransmission(false);
Wire.requestFrom(MPU_addr,14,true); // request a total of 14 registers
AcX=Wire.read()<<8|Wire.read(); // 0x3B (ACCEL_XOUT_H) & 0x3C (ACCEL_XOUT_L)
AcY=Wire.read()<<8|Wire.read(); // 0x3D (ACCEL_YOUT_H) & 0x3E (ACCEL_YOUT_L)
AcZ=Wire.read()<<8|Wire.read(); // 0x3F (ACCEL_ZOUT_H) & 0x40 (ACCEL_ZOUT_L)
Tmp=Wire.read()<<8|Wire.read(); // 0x41 (TEMP_OUT_H) & 0x42 (TEMP_OUT_L)
GyX=Wire.read()<<8|Wire.read(); // 0x43 (GYRO_XOUT_H) & 0x44 (GYRO_XOUT_L)
GyY=Wire.read()<<8|Wire.read(); // 0x45 (GYRO_YOUT_H) & 0x46 (GYRO_YOUT_L)
GyZ=Wire.read()<<8|Wire.read(); // 0x47 (GYRO_ZOUT_H) & 0x48 (GYRO_ZOUT_L)
xCal = xCal + GyX;
yCal = yCal + GyY;
zCal = zCal + GyZ;
i = i + 1;
}
xOffset = xCal/1000;
yOffset = yCal/1000;
zOffset = zCal/1000;
Serial.print("X Offset: ");
Serial.println(xOffset);
Serial.print("Y Offset: ");
Serial.println(yOffset);
Serial.print("Z Offset: ");
Serial.println(zOffset);
Serial.println("--------------------");
Serial.println();
delay(2500);
Serial.println("Ready");
digitalWrite(13,HIGH);
return;
}
void gyroSetup()
{
pinMode(resetButtonPin,INPUT);
pinMode(13,OUTPUT);
digitalWrite(13,LOW);
horizontalServo.attach(7);
horizontalServo.write(horizontalPosition);
delay(15);
verticalServo.attach(6);
verticalServo.write(verticalPosition);
delay(15);
sideTiltServo.attach(5);
sideTiltServo.write(sideTiltPosition);
delay(15);
Serial.println("Initializing Gyroscope...");
Wire.begin();
Wire.beginTransmission(MPU_addr);
Wire.write(0x6B); // PWR_MGMT_1 register
Wire.write(0); // set to zero (wakes up the MPU-6050)
Wire.endTransmission(true);
Serial.println("Initialization Complete");
GetCalibrationData();
return;
}
void headTracking()
{
TIMERcurrentMillis = millis();
if (TIMERcurrentMillis - TIMERpreviousMillis >= TIMERinterval)
{
//reset timer
TIMERpreviousMillis = TIMERcurrentMillis;
buttonPrevious = buttonCurrent;
if(digitalRead(resetButtonPin) == HIGH)
{
buttonCurrent = 1;
}
else
{
buttonCurrent = 0;
}
buttonHistory = (buttonHistory << 1) | buttonCurrent;
if((buttonPrevious == 0)&&(buttonCurrent == 1))
{
test = 0;
}
}
if(test == 0)
{
if(buttonHistory == 0x0)
{
test = 1;
sideTiltPosition = 90;
sideTiltServo.write(sideTiltPosition);
verticalPosition = 90;
verticalServo.write(verticalPosition);
horizontalPosition = 90;
horizontalServo.write(horizontalPosition);
}
}
Wire.beginTransmission(MPU_addr);
Wire.write(0x43); // starting with register 0x43 (GYRO_XOUT_H)
Wire.endTransmission(false);
Wire.requestFrom(MPU_addr,14,true); // request a total of 6 registers
GyX=Wire.read()<<8|Wire.read(); // 0x43 (GYRO_XOUT_H) & 0x44 (GYRO_XOUT_L)
GyY=Wire.read()<<8|Wire.read(); // 0x45 (GYRO_YOUT_H) & 0x46 (GYRO_YOUT_L)
GyZ=Wire.read()<<8|Wire.read(); // 0x47 (GYRO_ZOUT_H) & 0x48 (GYRO_ZOUT_L)
GyX=(GyX-xOffset)/131;
GyY=(GyY-yOffset)/131;
GyZ=(GyZ-zOffset)/131;
X = X + GyX;
Y = Y + GyY;
Z = Z + GyZ;
i = i + 1;
currentMillis = millis();
if (currentMillis - previousMillis >= interval)
{
//take average
X = X/i;
Y = -Y/i;
Z = Z/i;
//multiply by 0.01 (ten milliseconds)
X = X*0.02;
Y = Y*0.02;
Z = Z*0.02;
//reset i
i = 0;
//reset timer
previousMillis = currentMillis;
//-------------------------------------------------------------------------------------
sideTiltPosition = sideTiltPosition + X;
if((sideTiltPosition <= 60) && (sideTiltPosition >= 0))
{
sideTiltServo.write(sideTiltPosition);
}
else if(sideTiltPosition > 60)
{
sideTiltPosition = 60;
}
else if(horizontalPosition < 0)
{
sideTiltPosition = 0;
}
//-------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------
verticalPosition = verticalPosition + Y;
if((verticalPosition <= 60) && (verticalPosition >= 0))
{
verticalServo.write(verticalPosition);
}
else if(verticalPosition > 60)
{
verticalPosition = 60;
}
else if(verticalPosition < 0)
{
verticalPosition = 0;
}
//-------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------
horizontalPosition = horizontalPosition + Z;
if((horizontalPosition <= 60) && (horizontalPosition >= 0))
{
horizontalServo.write(horizontalPosition);
}
else if(horizontalPosition > 60)
{
horizontalPosition = 60;
}
else if(horizontalPosition < 0)
{
horizontalPosition = 0;
}
//-------------------------------------------------------------------------------------
//reset averages
X = 0;
Y = 0;
Z = 0;
}
return;
}
MoeSizzlac
Active Member
I don't have a sketch board to draw on easily so I'll try to describe what to do for the Flashlight only:
Step 1) Solder directly to the terminals on the flashlight. Now you have one red wire (Flashlight Positive) and one black wire (ground).
Step 2) Ground the flashlight in the backpack where the battery pack is.
Step 3) FOR FLASHLIGHT ONLY, you need to run 2 wires from the backpack to the gauntlet (5V Power and flashlight positive). There will be other wires for powering the servos, reset button, etc but that is seperate for now.
Step 4) In the gauntlet: From the power in, wire one 5v Power to the double momentary switch (one button only)
Step 5) In the gauntlet: From the power in, wire one 5v Power to the latching switch.
Step 6) From the double momentary, wire the other side of the one button to the Flashlight positive.
Step 7) From the Latching switch, wire the other side of the switch to the Flashlight positive.
Let me know if that is clear. If someone has a easy sketch program to use I will download it and use that to illistrate my point.
ksj
Well-Known Member
What model flashlight did you use?
MoeSizzlac
Active Member
I used the GearLight Flashlight from amazon here: https://www.amazon.com/gp/product/B072WHQFJ7/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Mrdchavez
New Member
Excellent Moe thank you very much!!! I'll give this a shot, I'll let you know when I'm able to accomplish this I'm still 3d printing out a lot of the stuff and find time to do this in between taking care of the household.
Mrdchavez
New Member
Next question how did you wire that battery pack through the usb? In the picture it looks like you just stuck two wires in there or is there some sort of an adapter? Thank you
ksj
Well-Known Member
Some options that could work for you:
USB to TTL Serial Cable - Debug / Console Cable for Raspberry Pi
The cable is easiest way ever to connect to your microcontroller/Raspberry Pi/WiFi router serial console port. Inside the big USB plug is a USB<->Serial conversion chip and at the end ...
www.adafruit.com
USB Micro-B Breakout Board
Simple but effective - this breakout board has a USB Micro-B connector, with all 5 pins broken out. Great for pairing with a microcontroller with USB support, or adding USB 5V power to a ...
www.adafruit.com
USB Type A Plug Breakout Cable with Premium Female Jumpers
If you'd like to connect a USB-capable chip to your USB host, this cable will make the task very simple. There is no converter chip in this cable! Its basically a plain USB cable ...
www.adafruit.com
USB-A Male Plug to 5-pin Terminal Block
This is the USB-A Male Plug to 5-pin Terminal Block. If you need to connect to a device with a USB Jack, maybe make your own USB stick or custom cable of sorts - this adapter will ...
www.adafruit.com
MoeSizzlac
Active Member
I used one of these: https://www.amazon.com/Partstock-Co...071&sprefix=usb+2.0+male+solder,aps,66&sr=8-4
and soldered a wire to the outside most pads to get 5V.
However, ksj has a better idea of using the USB-A male plug. No soldering necessary.
Mrdchavez
New Member
Excellent ksj!!! Thx for taking the time to answer! I appreciate it
Some options that could work for you:
USB to TTL Serial Cable - Debug / Console Cable for Raspberry Pi
The cable is easiest way ever to connect to your microcontroller/Raspberry Pi/WiFi router serial console port. Inside the big USB plug is a USB<->Serial conversion chip and at the end ...
USB Micro-B Breakout Board
Simple but effective - this breakout board has a USB Micro-B connector, with all 5 pins broken out. Great for pairing with a microcontroller with USB support, or adding USB 5V power to a ...
USB Type A Plug Breakout Cable with Premium Female Jumpers
If you'd like to connect a USB-capable chip to your USB host, this cable will make the task very simple. There is no converter chip in this cable! Its basically a plain USB cable ...
USB-A Male Plug to 5-pin Terminal Block
This is the USB-A Male Plug to 5-pin Terminal Block. If you need to connect to a device with a USB Jack, maybe make your own USB stick or custom cable of sorts - this adapter will ...
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