Arduino Projects
Bluetooth
Workshop dust warning
Watering system
Illuminated bowl
Code for other projects
// LED light dance
//Allen Kaye March 7th 2017
/*
* VCC on relay board to 5 v arduino
* gnd to grd
* IN1 to IN4 to Arduino 2, 3, 4 5
* Dealy currently .5 second
*/
// Outputs a high to 4 relays in a random sequence
#define soundpin 8
#define LED1 2 // 4 Leds LED's on Digital output pins 3,4,5,6
#define LED2 3
#define LED3 4
#define LED4 5
int RANDOMVALUE = 0;
void setup()
{
pinMode(LED1, OUTPUT);
pinMode(LED2, OUTPUT);
pinMode(LED3, OUTPUT);
pinMode(LED4, OUTPUT);
Serial.begin(9600);
randomSeed(analogRead(0));
}
void loop()
{
RANDOMVALUE = random(4);
Serial.print("The Random Number is = ");
Serial.println(RANDOMVALUE);
if (RANDOMVALUE ==0)
{
Serial.print("in 0");
digitalWrite(LED1,LOW);
digitalWrite(LED2,HIGH);
digitalWrite(LED3,HIGH);
digitalWrite(LED4,HIGH);
Serial.print("it is 0 ");
}
else if (RANDOMVALUE ==1)
{
Serial.print("in 1");
digitalWrite(LED1,HIGH);
digitalWrite(LED2,LOW);
digitalWrite(LED3,HIGH);
digitalWrite(LED4,HIGH);
Serial.print("it is 1");
}
else if (RANDOMVALUE ==2)
{
digitalWrite(LED1,HIGH);
digitalWrite(LED2,HIGH);
digitalWrite(LED3,LOW);
digitalWrite(LED4,HIGH);
Serial.print("it is 2");
}
else if (RANDOMVALUE ==3)
{
digitalWrite(LED1,HIGH);
digitalWrite(LED2,HIGH);
digitalWrite(LED3,HIGH);
digitalWrite(LED4,LOW);
Serial.print("it is 3");
}
delay(400);
}
Other Code examples for reference
/*
Allen Kaye 2019
MSGEQ7 Demo app
Look for the breakout board on www.whizoo.com
This code runs on an Arduino Duemilanove, but will run on other Arduino models.
Connections:
- GND to GND on MSGEQ7 breakout board, and LED's
- 5V to VDD on MSGEQ7 breakout board
- A0 to OUT on MSGEQ7 breakout board
- D7 to STROBE on MSGEQ7 breakout board
- D8 to RESET on MSGEQ7 breakout board
- D3 to LED 0 (indicator for frequency band 0)
- D5 to LED 1 (indicator for frequency band 1)
- D6 to LED 2 (indicator for frequency band 2)
- D9 to LED 3 (indicator for frequency band 3)
- D10 to LED 4 (indicator for frequency band 4)
- D11 to LED 5 (indicator for frequency band 5)
*/
// Hardware-specific defines
#define MSGEQ7_STROBE_PIN 7
#define MSGEQ7_RESET_PIN 8
#define MSGEQ7_ANALOG_PIN A0
#define NUM_FREQUENCY_BANDS 7
// Duemilanove only has 6 PWM outputs, so the last LED won't respond properly. Your
// board may have more PWM outputs. Typically you only want to monitor the lowest
// frequency bands because that is where the beat is.
int led[NUM_FREQUENCY_BANDS] = {3, 5, 6, 9, 10, 11, 0};
// There is a concept of "persistence of vision" with LED's. The LED has to be on long enough
// for the eye to recognise that it is on. When a high volume is received on a frequency band,
// The LED is turned on (at a high PWM value) and then gradually faded until the next beat in
// that frequency.
int ledPWMValue[NUM_FREQUENCY_BANDS] = {0, 0, 0, 0, 0, 0, 0};
void setup() {
// Set the LED pins as outputs
for (int i=0; i<NUM_FREQUENCY_BANDS; i++)
pinMode(led[i], OUTPUT);
// Set up the MSGEQ7 IC
pinMode(MSGEQ7_ANALOG_PIN, INPUT);
pinMode(MSGEQ7_STROBE_PIN, OUTPUT);
pinMode(MSGEQ7_RESET_PIN, OUTPUT);
digitalWrite(MSGEQ7_RESET_PIN, LOW);
digitalWrite(MSGEQ7_STROBE_PIN, HIGH);
}
// This loop executes around 100 times per second
void loop() {
int frequencyBandVolume;
// Toggle the RESET pin of the MSGEQ7 to start reading from the lowest frequency band
digitalWrite(MSGEQ7_RESET_PIN, HIGH);
digitalWrite(MSGEQ7_RESET_PIN, LOW);
// Read the volume in every frequency band from the MSGEQ7
for (int i=0; i<NUM_FREQUENCY_BANDS; i++) {
digitalWrite(MSGEQ7_STROBE_PIN, LOW);
delayMicroseconds(30); // Allow the output to settle
frequencyBandVolume = analogRead(MSGEQ7_ANALOG_PIN);
digitalWrite(MSGEQ7_STROBE_PIN, HIGH);
// The read value is 10-bit (0 to 1024). PWM needs a value from 0 to 255, so divide by 4
frequencyBandVolume = frequencyBandVolume >> 2;
// Fade the current LED value for this band
ledPWMValue[i] = ledPWMValue[i] > 7? ledPWMValue[i] - 7 : 0;
// Don't show the lower values
if (frequencyBandVolume > 70) {
// If the new volume is greater than that currently being showed then show the higher volume
if (frequencyBandVolume > ledPWMValue[i])
ledPWMValue[i] = frequencyBandVolume;
}
// Set the LED PWM value to the frequency band's volume
analogWrite(led[i], ledPWMValue[i]);
}
// Wait before executing this loop again
delay(10);
}
/*
Allen K
Original 2018 Updated Feb 2020
Moisture controller using Analog Input. One moisture sensor connected to A0. One relay and water pump triggered ON when PIN 7 is HIGH
*/
#include <SPI.h>
#include <SD.h>
//const int chipSelect = 4;
int sensorPin1 = A0; // select the input pin for the potentiometer
int sensorValue1 = 0; // variable to store the value coming from the sensor
int sensorPin2 = A1;
int sensorValue2 = 0;
int relay1=4;
int relay5=5;
int relay6=6;
int relay7=7;
int led5=5;
int led6=6;
int led8=8;
int loops = 0;
int i = 0;
int j = 0;
File dataFile;
void setup()
{
Serial.begin(9600);
/* while(!Serial)
{
; // wait for serial port to connect
Serial.println("waiting for serial port to connect");
}
if (!SD.begin(chipSelect))
{
Serial.println("Card failed or not in holder");
return;
}
*/
pinMode(relay7, OUTPUT);
Serial.println("Starting");
pinMode(led5, OUTPUT);
pinMode(led6, OUTPUT);
pinMode(led8, OUTPUT);
digitalWrite(led5,HIGH);
digitalWrite(led6,HIGH);
digitalWrite(led8,HIGH);
delay(2000);
digitalWrite(led5,LOW);
digitalWrite(led6,LOW);
digitalWrite(led8,LOW);
}
void loop() {
digitalWrite(led6,HIGH);
delay(1000);
digitalWrite(led6,LOW);
// read the value from the sensor at A0:
sensorValue1 = analogRead(sensorPin1);
sensorValue2 = analogRead(sensorPin2);
Serial.println(sensorValue1);
/* String dataString = "";
dataString += String(sensorValue);
dataString += ",";
dataFile = SD.open("ghouse1.txt", FILE_WRITE);
Serial.println("testgreenhouse should be open");
if (dataFile) {
dataFile.println(dataString);
dataFile.close();
Serial.println("written an item of data");
*/
for (i=0;i<4;i++) {
digitalWrite(led5, HIGH);
delay(500);
digitalWrite(led5, LOW);
delay(500);
Serial.println("Led 5 flash");
}
/*
// }
*/
digitalWrite(relay7,LOW);
if (sensorValue1>800) {
Serial.println("Too DRY");
for (i=0;i<6;i++){
digitalWrite(led8, HIGH);
delay(500);
digitalWrite(led8, LOW);
delay(500);
}
digitalWrite(relay7,HIGH);
delay(10000);
digitalWrite(relay7,LOW);
}
else {
Serial.println("wet enough for now");
digitalWrite(relay7,LOW);
}
digitalWrite(relay7,LOW);
/* if (sensorValue2>800) {
Serial.println("Too DRY");
for (i=0;i<6;i++){
digitalWrite(led8, HIGH);
delay(500);
digitalWrite(led8, LOW);
delay(500);
}
digitalWrite(relay6,HIGH);
delay(10000);
digitalWrite(relay6,LOW);
// dataFile.println("On");
// dataFile.close();
}
else {
Serial.println("Second sensor wet enough for now");
digitalWrite(relay6,LOW);
}
delay(2000);
digitalWrite(led6,HIGH);
delay(2000);
digitalWrite(led6,LOW);
Serial.println("cycle ends");
*/
Serial.println("loop delay now");
delay(20000);
Serial.println("loop delay end");
}
//
Allen Kaye demon 2019
LED light dance
#define soundpin 8 // reads the power from the light sensor from Analog input 0
#define LED1 3 // 4 Leds LED's on Digital output pins 3,4,5,6
#define LED2 4
#define LED3 5
#define LED4 6
int sound;
void setup()
{
// initialize the serial communications:
Serial.begin(9600);
// Provide power by using the analog inputs as normal digital pins.
pinMode(soundpin, INPUT);
pinMode(LED1, OUTPUT);
pinMode(LED2, OUTPUT);
pinMode(LED3, OUTPUT);
pinMode(LED4, OUTPUT);
digitalWrite(LED1,HIGH); // set the LEDs on
digitalWrite(LED2,HIGH);
digitalWrite(LED3,HIGH);
digitalWrite(LED4,HIGH);
delay(1000);
digitalWrite(LED1,LOW); // set the LEDs on
digitalWrite(LED2,LOW);
digitalWrite(LED3,LOW);
digitalWrite(LED4,LOW);
}
void loop()
{
sound=analogRead(soundpin); // this samples the sound constantly
Serial.println(sound);
if((sound)>30)
{
digitalWrite(LED1,HIGH); // set the LEDs on
digitalWrite(LED2,HIGH);
digitalWrite(LED3,HIGH);
digitalWrite(LED4,HIGH);
}
else if((sound)>20)
{
digitalWrite(LED1,HIGH); // set the LED on
digitalWrite(LED2,HIGH);
digitalWrite(LED3,HIGH);
digitalWrite(LED4,LOW); // set the LED off
}
else if(sound>10)
{
digitalWrite(LED1,HIGH); // set the LED on
digitalWrite(LED2,HIGH);
digitalWrite(LED3,LOW); // set the LED off
digitalWrite(LED4,LOW);
}
else if(sound>5)
{
digitalWrite(LED1,HIGH); // set the LED on
digitalWrite(LED2,LOW); // set the LED off
digitalWrite(LED3,LOW);
digitalWrite(LED4,LOW);
}
else
{
digitalWrite(LED1,LOW); // set the LEDs off
digitalWrite(LED2,LOW);
digitalWrite(LED3,LOW);
digitalWrite(LED4,LOW);
}
Serial.println(soundpin); //output for serial monitor
delay(5); // And a shot delay
}