Category Archives: Arduino

In this video lesson we model a 3D room, and have a marble bouncing around in the room, off of each of the six walls. Below we include the code we develop in the video above

from vpython import *
roomX=12
roomY=10
roomZ=16
wallT=.5
wallColor=vector(1,1,1)
wallOpacity=.8
frontOpacity=.1
marbleR=.5
ballColor=vector(0,0,1)

myFloor=box(size=vector(roomX,wallT,roomZ),pos=vector(0,-roomY/2,0),color=wallColor,opacity=wallOpacity)
myCeiling=box(size=vector(roomX,wallT,roomZ),pos=vector(0,roomY/2,0),color=wallColor,opacity=wallOpacity)
leftWall=box(size=vector(wallT,roomY,roomZ),pos=vector(-roomX/2,0,0),color=wallColor,opacity=wallOpacity)
rightWall=box(size=vector(wallT,roomY,roomZ),pos=vector(roomX/2,0,0),color=wallColor,opacity=wallOpacity)
backWall=box(size=vector(roomX,roomY,wallT),pos=vector(0,0,-roomZ/2),color=wallColor,opacity=wallOpacity)
frontWall=box(size=vector(roomX,roomY,wallT),pos=vector(0,0,roomZ/2),color=wallColor,opacity=frontOpacity)
marble=sphere(color=ballColor,radius=marbleR)

marbleX=0
deltaX=.1

marbleY=0
deltaY=.1

marbleZ=0
deltaZ=.1

while True:
    rate(20)

    marbleX=marbleX+deltaX
    marbleY=marbleY+deltaY
    marbleZ=marbleZ+deltaZ


    if marbleX+marbleR>(roomX/2-wallT/2) or marbleX-marbleR<(-roomX/2+wallT/2):
        deltaX=deltaX*(-1)
        marbleX=marbleX+deltaX

    if marbleY+marbleR>(roomY/2-wallT/2) or marbleY-marbleR<(-roomY/2+wallT/2):
        deltaY=deltaY*(-1)
        marbleY=marbleY+deltaY

    if marbleZ+marbleR>(roomZ/2-wallT/2) or marbleZ-marbleR<(-roomZ/2+wallT/2):
        deltaZ=deltaZ*(-1)
        marbleZ=marbleZ+deltaZ

    marble.pos=vector(marbleX,marbleY,marbleZ)

from vpython import *

roomX=12

roomY=10

roomZ=16

wallT=.5

wallColor=vector(1,1,1)

wallOpacity=.8

frontOpacity=.1

marbleR=.5

ballColor=vector(0,0,1)

myFloor=box(size=vector(roomX,wallT,roomZ),pos=vector(0,-roomY/2,0),color=wallColor,opacity=wallOpacity)

myCeiling=box(size=vector(roomX,wallT,roomZ),pos=vector(0,roomY/2,0),color=wallColor,opacity=wallOpacity)

leftWall=box(size=vector(wallT,roomY,roomZ),pos=vector(-roomX/2,0,0),color=wallColor,opacity=wallOpacity)

rightWall=box(size=vector(wallT,roomY,roomZ),pos=vector(roomX/2,0,0),color=wallColor,opacity=wallOpacity)

backWall=box(size=vector(roomX,roomY,wallT),pos=vector(0,0,-roomZ/2),color=wallColor,opacity=wallOpacity)

frontWall=box(size=vector(roomX,roomY,wallT),pos=vector(0,0,roomZ/2),color=wallColor,opacity=frontOpacity)

marble=sphere(color=ballColor,radius=marbleR)

marbleX=0

deltaX=.1

marbleY=0

deltaY=.1

marbleZ=0

deltaZ=.1

while True:

rate(20)

marbleX=marbleX+deltaX

marbleY=marbleY+deltaY

marbleZ=marbleZ+deltaZ

if marbleX+marbleR>(roomX/2-wallT/2) or marbleX-marbleR<(-roomX/2+wallT/2):

deltaX=deltaX*(-1)

marbleX=marbleX+deltaX

if marbleY+marbleR>(roomY/2-wallT/2) or marbleY-marbleR<(-roomY/2+wallT/2):

deltaY=deltaY*(-1)

marbleY=marbleY+deltaY

if marbleZ+marbleR>(roomZ/2-wallT/2) or marbleZ-marbleR<(-roomZ/2+wallT/2):

deltaZ=deltaZ*(-1)

marbleZ=marbleZ+deltaZ

marble.pos=vector(marbleX,marbleY,marbleZ)

3D Graphics with Visual Python, Arduino, Arduino with Python, Python

Using an Arduino with Python LESSON 8: Live Thermometer 3D Visual Using DHT11

March 1, 2022 admin

In this video lesson we connect the Arduino to a DHT11 temperature and humidity sensor. We show how to wire the device up, and then how to code the Arduino. The data is passed from the Arduino to python. We then create a live 3D thermometer model that updates as the temperature changes.

On the arduino side, this is the code which we use:

#include "DHT.h"
#define DHTPIN 2
#define DHTTYPE DHT11

float tempF;
float tempC;
float humidity;

int setTime=500;
int dt=1000;

DHT TH(DHTPIN,DHTTYPE);

void setup() {
  // put your setup code here, to run once:
Serial.begin(115200);
TH.begin();
delay(setTime);
}
void loop() {
  // put your main code here, to run repeatedly:
tempC=TH.readTemperature();
tempF=TH.readTemperature(true);
humidity=TH.readHumidity();


Serial.print(tempF);
Serial.print(",");
Serial.println(humidity);

delay(dt);
}

#include "DHT.h"

#define DHTPIN 2

#define DHTTYPE DHT11

float tempF;

float tempC;

float humidity;

int setTime=500;

int dt=1000;

DHT TH(DHTPIN,DHTTYPE);

void setup() {

// put your setup code here, to run once:

Serial.begin(115200);

TH.begin();

delay(setTime);

}

void loop() {

// put your main code here, to run repeatedly:

tempC=TH.readTemperature();

tempF=TH.readTemperature(true);

humidity=TH.readHumidity();

Serial.print(tempF);

Serial.print(",");

Serial.println(humidity);

delay(dt);

}

Then on the python side, we use the following code:

import time
import serial
from vpython import *

arduinoData=serial.Serial('com3',115200)
time.sleep(.5)
digValue=label(text='50',height=20,box=False,pos=vector(0,-2.5,2))
bulb=sphere(radius=1,color=color.red,pos=vector(0,-3,0))
cyl=cylinder(radius=.6,color=color.red,axis=vector(0,1,0),length=6,pos=vector(0,-3,0))
bulbGlass=sphere(radius=1.2,color=color.white,opacity=.25,pos=vector(0,-3,0))
cylGlass=cylinder(radius=.8,color=color.white,axis=vector(0,1,0),opacity=.25,length=6,pos=vector(0,-3,0))
for temp in range(0,115,10):
    tickPos=4.5/115*temp+1.5
    tick=cylinder(radius=.7,color=color.black,length=.1,axis=vector(0,1,0),pos=vector(0,tickPos-3,0))
    label=text(text=str(temp),color=color.white,pos=vector(-2,tickPos-3,0),height=.3)
while True:
    while arduinoData.in_waiting==0:
        pass
    dataPacket=arduinoData.readline()
    dataPacket=str(dataPacket,'utf-8')
    dataPacket=dataPacket.strip('\r\n')
    dataPacket=dataPacket.split(',')
    temp=float(dataPacket[0])
    hum=float(dataPacket[1])
    len=(4.5/115)*temp+1.5
    cyl.length=len
    digValue.text=str(temp)

import time

import serial

from vpython import *

arduinoData=serial.Serial('com3',115200)

time.sleep(.5)

digValue=label(text='50',height=20,box=False,pos=vector(0,-2.5,2))

bulb=sphere(radius=1,color=color.red,pos=vector(0,-3,0))

cyl=cylinder(radius=.6,color=color.red,axis=vector(0,1,0),length=6,pos=vector(0,-3,0))

bulbGlass=sphere(radius=1.2,color=color.white,opacity=.25,pos=vector(0,-3,0))

cylGlass=cylinder(radius=.8,color=color.white,axis=vector(0,1,0),opacity=.25,length=6,pos=vector(0,-3,0))

for temp in range(0,115,10):

tickPos=4.5/115*temp+1.5

tick=cylinder(radius=.7,color=color.black,length=.1,axis=vector(0,1,0),pos=vector(0,tickPos-3,0))

label=text(text=str(temp),color=color.white,pos=vector(-2,tickPos-3,0),height=.3)

while True:

while arduinoData.in_waiting==0:

pass

dataPacket=arduinoData.readline()

dataPacket=str(dataPacket,'utf-8')

dataPacket=dataPacket.strip('\r\n')

dataPacket=dataPacket.split(',')

temp=float(dataPacket[0])

hum=float(dataPacket[1])

len=(4.5/115)*temp+1.5

cyl.length=len

digValue.text=str(temp)

3D Graphics with Visual Python, Arduino, Arduino with Python

Using an Arduino with Python LESSON 5: Analog Voltage Meter in vPython

February 8, 2022 admin

In this lesson we begin coding a 3D analog voltmeter model in vPython. We begin by connecting a potentiometer to an arduino to create a voltage divider. The voltage is read from the center tap of the potentiometer by the arduino, and then the arduino passes the data to python. Then, we animate the analog voltmeter based on the readings passed from the Arduino. Enjoy!

int potPin=A0;
int DL=100;
int potVal;
void setup() {
  // put your setup code here, to run once:
pinMode(potPin,INPUT);
Serial.begin(115200);
}

void loop() {
  // put your main code here, to run repeatedly:
potVal=analogRead(potPin);
Serial.println(potVal);
delay(DL);
}

int potPin=A0;

int DL=100;

int potVal;

void setup() {

// put your setup code here, to run once:

pinMode(potPin,INPUT);

Serial.begin(115200);

}

void loop() {

// put your main code here, to run repeatedly:

potVal=analogRead(potPin);

Serial.println(potVal);

delay(DL);

}

Then this is the code we developed for the Python side.

import time
import serial
from vpython import *
import numpy as np

arrowLength=1
arrowWidth=.02
myArrow=arrow(length=arrowLength,shaftwidth=arrowWidth,color=color.red,axis=vector(1,1,0))

tickL=.1
tickW=.02
tickH=.02

for theta in np.linspace(5*np.pi/6,np.pi/6,6):
    tickMajor=box(color=color.black,pos=vector(arrowLength*np.cos(theta),arrowLength*np.sin(theta),0),size=vector(tickL,tickW,tickH),axis=vector(arrowLength*np.cos(theta),arrowLength*np.sin(theta),0))


boxX=2.5
boxY=1.5
boxZ=.1
myCase=box(color=color.white,size=vector(boxX,boxY,boxZ),pos=vector(0,.9*boxY/2,-boxZ))

arduinoData=serial.Serial('com3',115200)
time.sleep(1)
while True:
    while arduinoData.in_waiting==0:
        pass
    dataPacket=arduinoData.readline()
    dataPacket=str(dataPacket,'utf-8')
    dataPacket=dataPacket.strip('\r\n')
    dataPacket=int(dataPacket)
    potVal=dataPacket
    theta=-2*np.pi/3069*potVal+5*np.pi/6
    myArrow.axis=vector(arrowLength*np.cos(theta),arrowLength*np.sin(theta),0)

    # for theta in np.linspace(5*np.pi/6,np.pi/6,150):
    #     rate(25)
    #     myArrow.axis=vector(arrowLength*np.cos(theta),arrowLength*np.sin(theta),0)
    
    # for theta in np.linspace(np.pi/6,5*np.pi/6,150):
    #     rate(25)
    #     myArrow.axis=vector(arrowLength*np.cos(theta),arrowLength*np.sin(theta),0)

import time

import serial

from vpython import *

import numpy as np

arrowLength=1

arrowWidth=.02

myArrow=arrow(length=arrowLength,shaftwidth=arrowWidth,color=color.red,axis=vector(1,1,0))

tickL=.1

tickW=.02

tickH=.02

for theta in np.linspace(5*np.pi/6,np.pi/6,6):

tickMajor=box(color=color.black,pos=vector(arrowLength*np.cos(theta),arrowLength*np.sin(theta),0),size=vector(tickL,tickW,tickH),axis=vector(arrowLength*np.cos(theta),arrowLength*np.sin(theta),0))

boxX=2.5

boxY=1.5

boxZ=.1

myCase=box(color=color.white,size=vector(boxX,boxY,boxZ),pos=vector(0,.9*boxY/2,-boxZ))

arduinoData=serial.Serial('com3',115200)

time.sleep(1)

while True:

while arduinoData.in_waiting==0:

pass

dataPacket=arduinoData.readline()

dataPacket=str(dataPacket,'utf-8')

dataPacket=dataPacket.strip('\r\n')

dataPacket=int(dataPacket)

potVal=dataPacket

theta=-2*np.pi/3069*potVal+5*np.pi/6

myArrow.axis=vector(arrowLength*np.cos(theta),arrowLength*np.sin(theta),0)

# for theta in np.linspace(5*np.pi/6,np.pi/6,150):

# rate(25)

# myArrow.axis=vector(arrowLength*np.cos(theta),arrowLength*np.sin(theta),0)

# for theta in np.linspace(np.pi/6,5*np.pi/6,150):

# rate(25)

# myArrow.axis=vector(arrowLength*np.cos(theta),arrowLength*np.sin(theta),0)

Arduino, Tutorial

ARDUINO TUTORIAL 68: Make a Remote Controlled RGB LED with Brightness and Color Control

June 30, 2020 admin

RGB LED Remote Control — This is our Remote Controlled RGB LED

In this lesson we take you through step-by-step instructions on creating a remotely controlled RGB LED. This is the solution to the Homework Assignment given in Tutorial 68. It is important for you to try and complete this on your own before looking at my solutions.

We are building this with parts from our Elegoo Kit , and our actual build is using an Arduino Nano, which allows the project to be built on a single breadboard. You can get the neat jumper wires HERE.

This video steps you through our build.

Below is the code we developed in this video.

#include <IRremote.h>
int IRpin=9;
IRrecv IR(IRpin);
decode_results cmd;
String myCom;

int rPin=6;
int gPin=10;
int bPin=5;

int rBright=255;
int gBright=255;
int bBright=255;

float dFact=1;


void setup()
{
Serial.begin(9600);
IR.enableIRIn();

pinMode(rPin,OUTPUT);
pinMode(gPin,OUTPUT);
pinMode(bPin,OUTPUT);

}

void loop() {
  while (IR.decode(&cmd)==0){ 
}
delay(1500);
IR.resume();

if (cmd.value==0xFF6897){
  myCom="zero";
  Serial.println(myCom); 
}
if (cmd.value==0xFF30CF){
  myCom="one";
  Serial.println(myCom); 
}
if (cmd.value==0xFF18E7){
  myCom="two";
  Serial.println(myCom); 
}
if (cmd.value==0xFF7A85){
  myCom="three";
  Serial.println(myCom); 
}
if (cmd.value==0xFF10EF){
  myCom="four";
  Serial.println(myCom); 
}
if (cmd.value==0xFF38C7){
  myCom="five";
  Serial.println(myCom); 
}
if (cmd.value==0xFF5AA5){
  myCom="six";
  Serial.println(myCom); 
}
if (cmd.value==0xFF42BD){
  myCom="seven";
  Serial.println(myCom); 
}
if (cmd.value==0xFF4AB5){
  myCom="eight";
  Serial.println(myCom); 
}
if (cmd.value==0xFF52AD){
  myCom="nine";
  Serial.println(myCom); 
}

if (cmd.value==0xFFA25D){
  myCom="pwr";
  Serial.println(myCom); 
}
if (cmd.value==0xFF629D){
  myCom="v+";
  Serial.println(myCom);
}
if (cmd.value==0xFFE21D){
  myCom="fun";
  Serial.println(myCom);
}
if (cmd.value==0xFF22DD){
  myCom="rew";
  Serial.println(myCom);
}
if (cmd.value==0xFF02FD){
  myCom="play";
  Serial.println(myCom);
}
if (cmd.value==0xFFC23D){
  myCom="ff";
  Serial.println(myCom);
}
if (cmd.value==0xFFE01F){
  myCom="dn";
  Serial.println(myCom);
}
if (cmd.value==0xFFA857){
  myCom="v-";
  Serial.println(myCom);
}
if (cmd.value==0xFF906F){
  myCom="up";
  Serial.println(myCom);
}
if (cmd.value==0xFF9867){
  myCom="eq";
  Serial.println(myCom);
}
if (cmd.value==0xFFB04F
){
  myCom="st";
  Serial.println(myCom);
}
if(myCom=="pwr"){
  rBright=255;
  gBright=255;
  bBright=255;
  dFact=1;
}

if(myCom=="fun"){
  rBright=0;
  gBright=0;
  bBright=0;
  dFact=0;
}
if(myCom=="zero"){
  rBright=255;
  gBright=255;
  bBright=255;
}
if(myCom=="one"){
  rBright=255;
  gBright=0;
  bBright=0;
}
if(myCom=="two"){
  rBright=0;
  gBright=255;
  bBright=0;
}
if(myCom=="three"){
  rBright=0;
  gBright=0;
  bBright=255;
}
if(myCom=="four"){
  rBright=0;
  gBright=255;
  bBright=255;
}
if(myCom=="five"){
  rBright=255;
  gBright=0;
  bBright=150;
}
if(myCom=="six"){
  rBright=255;
  gBright=255;
  bBright=0;
}
if (myCom=="dn"){
  dFact=dFact*.75;
}
if (myCom=="up"){
  dFact=dFact*1.3;
  if (dFact>1){
    dFact=1;
  }
}

analogWrite(rPin,rBright*dFact);
analogWrite(gPin,gBright*dFact);
analogWrite(bPin,bBright*dFact);
}

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#include <IRremote.h>

int IRpin=9;

IRrecv IR(IRpin);

decode_results cmd;

String myCom;

int rPin=6;

int gPin=10;

int bPin=5;

int rBright=255;

int gBright=255;

int bBright=255;

float dFact=1;

void setup()

{

Serial.begin(9600);

IR.enableIRIn();

pinMode(rPin,OUTPUT);

pinMode(gPin,OUTPUT);

pinMode(bPin,OUTPUT);

}

void loop() {

while (IR.decode(&cmd)==0){

}

delay(1500);

IR.resume();

if (cmd.value==0xFF6897){

myCom="zero";

Serial.println(myCom);

}

if (cmd.value==0xFF30CF){

myCom="one";

Serial.println(myCom);

}

if (cmd.value==0xFF18E7){

myCom="two";

Serial.println(myCom);

}

if (cmd.value==0xFF7A85){

myCom="three";

Serial.println(myCom);

}

if (cmd.value==0xFF10EF){

myCom="four";

Serial.println(myCom);

}

if (cmd.value==0xFF38C7){

myCom="five";

Serial.println(myCom);

}

if (cmd.value==0xFF5AA5){

myCom="six";

Serial.println(myCom);

}

if (cmd.value==0xFF42BD){

myCom="seven";

Serial.println(myCom);

}

if (cmd.value==0xFF4AB5){

myCom="eight";

Serial.println(myCom);

}

if (cmd.value==0xFF52AD){

myCom="nine";

Serial.println(myCom);

}

if (cmd.value==0xFFA25D){

myCom="pwr";

Serial.println(myCom);

}

if (cmd.value==0xFF629D){

myCom="v+";

Serial.println(myCom);

}

if (cmd.value==0xFFE21D){

myCom="fun";

Serial.println(myCom);

}

if (cmd.value==0xFF22DD){

myCom="rew";

Serial.println(myCom);

}

if (cmd.value==0xFF02FD){

myCom="play";

Serial.println(myCom);

}

if (cmd.value==0xFFC23D){

myCom="ff";

Serial.println(myCom);

}

if (cmd.value==0xFFE01F){

myCom="dn";

Serial.println(myCom);

}

if (cmd.value==0xFFA857){

myCom="v-";

Serial.println(myCom);

}

if (cmd.value==0xFF906F){

myCom="up";

Serial.println(myCom);

}

if (cmd.value==0xFF9867){

myCom="eq";

Serial.println(myCom);

}

if (cmd.value==0xFFB04F

){

myCom="st";

Serial.println(myCom);

}

if(myCom=="pwr"){

rBright=255;

gBright=255;

bBright=255;

dFact=1;

}

if(myCom=="fun"){

rBright=0;

gBright=0;

bBright=0;

dFact=0;

}

if(myCom=="zero"){

rBright=255;

gBright=255;

bBright=255;

}

if(myCom=="one"){

rBright=255;

gBright=0;

bBright=0;

}

if(myCom=="two"){

rBright=0;

gBright=255;

bBright=0;

}

if(myCom=="three"){

rBright=0;

gBright=0;

bBright=255;

}

if(myCom=="four"){

rBright=0;

gBright=255;

bBright=255;

}

if(myCom=="five"){

rBright=255;

gBright=0;

bBright=150;

}

if(myCom=="six"){

rBright=255;

gBright=255;

bBright=0;

}

if (myCom=="dn"){

dFact=dFact*.75;

}

if (myCom=="up"){

dFact=dFact*1.3;

if (dFact>1){

dFact=1;

}

analogWrite(rPin,rBright*dFact);

analogWrite(gPin,gBright*dFact);

analogWrite(bPin,bBright*dFact);

}

Arduino, Tutorial

ARDUINO TUTORIAL 67: Create a Remote Controlled RGB LED with Brightness and Color Control

June 23, 2020 admin

In this video we give you a homework assignment to create a dimmable RGB LED. You must set color and brightness using the IR remote. In Tutorial 68 we will take you through the build, and show you the solution. I hope you will really try your best to do it on your own before you check out my solution.

Technology Tutorials

Category Archives: Arduino

Using an Arduino with Python LESSON 15: Model of Bouncing Marble in 3D Room

Using an Arduino with Python LESSON 8: Live Thermometer 3D Visual Using DHT11

Using an Arduino with Python LESSON 5: Analog Voltage Meter in vPython

ARDUINO TUTORIAL 68: Make a Remote Controlled RGB LED with Brightness and Color Control

ARDUINO TUTORIAL 67: Create a Remote Controlled RGB LED with Brightness and Color Control

Making The World a Better Place One High Tech Project at a Time. Enjoy!