Fritzing
Project #6: MicroView – Alcohol Gas Sensor – Mk09
Alcohol Gas Sensor – MQ-3
This alcohol sensor is suitable for detecting alcohol concentration on your breath, just like your common breathalyzer. It has a high sensitivity and fast response time. Sensor provides an analog resistive output based on alcohol concentration. The drive circuit is very simple, all it needs is one resistor. A simple interface could be a 0-3.3V ADC.
Features
* 5V DC or AC circuit
* Requires heater voltage
* Operation Temperature: -10 to 70 degrees C
* Heater consumption: less than 750mW* 16.8mm diameter
* 9.3 mm height without the pins
Note: Again, the MQ-3 is heater-driven so be aware that the sensor will become warm and may even emit a smell at first. This is completely normal.
Calibration: If you take your time, you can find out what values equate to specific percentages or even blood alcohol concentration in the case of a breathalyzer. You will of course need to calibrate your MQ-3 based on your specific Arduino code since sensor readings will vary. Do not get the sensor wet with alcohol! Simply squeeze to breathe the vapors of the alcohol into the sensor and take your readings.
Alcohol Gas Sensor – MQ-3
1 x MicroView
1 x MicroView – USB Programmer
1 x Alcohol Gas Sensor – MQ-3
1 x NeoPixel Stick – 8 x 5050 RGB LED
1 x LED Green
1 x 10k Ohm
1 x 100k Ohm Potentiometer
1 x Potentiometer Knob
1 x 4 Header
2 x 2 Header
14 x Jumper Wires 3″ M/M
1 x Half-Size Breadboard
1 x Battery Holder 3xAAA with Cover and Switch
3 x Battery AAA
MicroView
Pot – PIN 05 – Analog A2
MQ-3 – PIN 07 – Analog A0
GND – PIN 08 – GND
VIN – PIN 15 – +5V
NEO – PIN 12 – Digital 3
LEDG – PIN 11 – Digital 2
DonLuc1807Mk01
DonLuc1807Mk01.ino
// ***** Don Luc *****
// Software Version Information
// Project #6: MicroView - Alcohol Gas Sensor - MQ-3 - Mk09
// 7.1
// DonLuc1807Mk01 7-1
// MicroView
// Alcohol Gas Sensor - MQ-3
// include the library code:
#include <MicroView.h>
#include <Adafruit_NeoPixel.h>
// Alcohol Gas Sensor - MQ-3
int mq3Pin0 = A0; // Connected to the output pin of MQ3
int mq3Value = 0;
// NeoPixels
#define PIN 3 // On digital pin 3
#define NUMPIXELS 8 // NeoPixels NUMPIXELS = 8
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
int red = 0; // Red
int green = 0; // Green
int blue = 0; // Blue
int iNeo = 0; // Neopix
const int iBriPin = A2; // Panel Mount 1K potentiometer Brightneed
int iBri = 0; // Neopix Brightness
int iBriMin = 1023; // Brightneed minimum sensor value
int iBriMax = 0; // Brightneed maximum sensor value
// LED
int ledG = 1; // LED Green
void loop() {
// Alcohol Gas Sensor - MQ-3
// Give ample warmup time for readings to stabilize
isMQ3();
delay(100);
uView.clear(PAGE); // Erase the memory buffer, the OLED will be cleared
}
getMQ3.ino
// Alcohol Gas Sensor - MQ-3
void isMQ3(){
// LEDs - Low
for(int z=0; z<NUMPIXELS; z++){
// Black
red = 0; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = z; // Neopix
neopix();
}
// Probe
mq3Value = analogRead(mq3Pin0); // Take a reading from the probe
if( mq3Value >= 1 ){ // If the reading isn't zero, proceed
if (mq3Value > 1){ // If the average is over 50 ...
// Green
red = 0; // Red
green = 255; // Green
blue = 0; // Blue
iNeo = 0; // Neopix
neopix();
}
else{ // and if it's not ...
// Black
red = 0; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 0; // Neopix
neopix();
}
if (mq3Value > 250){ // and so on ...
// Green
red = 0; // Red
green = 255; // Green
blue = 0; // Blue
iNeo = 1; // Neopix
neopix();
}
else{
// Black
red = 0; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 1; // Neopix
neopix();
}
if (mq3Value > 350){
// Green
red = 0; // Red
green = 255; // Green
blue = 0; // Blue
iNeo = 2; // Neopix
neopix();
}
else{
// Black
red = 0; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 1; // Neopix
neopix();
}
if (mq3Value > 500){
// Yellow
red = 255; // Red
green = 255; // Green
blue = 0; // Blue
iNeo = 3; // Neopix
neopix();
}
else{
// Black
red = 0; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 3; // Neopix
neopix();
}
if (mq3Value > 650){
// Yellow
red = 255; // Red
green = 255; // Green
blue = 0; // Blue
iNeo = 4; // Neopix
neopix();
}
else{
// Black
red = 0; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 4; // Neopix
neopix();
}
if (mq3Value > 750){
// Yellow
red = 255; // Red
green = 255; // Green
blue = 0; // Blue
iNeo = 5; // Neopix
neopix();
}
else{
// Black
red = 0; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 5; // Neopix
neopix();
}
if (mq3Value > 850){
// Red
red = 255; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 6; // Neopix
neopix();
}
else{
// Black
red = 0; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 6; // Neopix
neopix();
}
if (mq3Value > 950){
// Red
red = 255; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 7; // Neopix
neopix();
}
else{
// Black
red = 0; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 7; // Neopix
neopix();
}
}
uView.setFontType(0); // Set font type 0: Numbers and letters. 10 characters per line (6 lines)
uView.setCursor(0,10); // Alcohol Gas Sensor
uView.print( "Alcohol" );
uView.setCursor(0,30); // Alcohol Gas Sensor
uView.print( mq3Value );
uView.display(); // Display
}
neopix.ino
// Neopix
void neopix() {
// Brightness
iBri = analogRead(iBriPin);
// iBri apply the calibration to the sensor reading
iBri = map(iBri, iBriMin, iBriMax, 0, 255);
// iBri in case the sensor value is outside the range seen during calibration
iBri = constrain(iBri, 0, 255);
pixels.setBrightness( iBri );
// Pixels.Color takes RGB values, from 0,0,0 up to 255,255,255
pixels.setPixelColor( iNeo, pixels.Color(red,green,blue) );
// This sends the updated pixel color to the hardware
pixels.show();
// Delay for a period of time (in milliseconds)
delay(50);
}
setup.ino
// Setup
void setup() {
uView.begin(); // Begin of MicroView
uView.clear(ALL); // Erase hardware memory inside the OLED controller
uView.display(); // Display the content in the buffer memory, by default it is the MicroView logo
delay(1000);
uView.clear(PAGE); // Erase the memory buffer, the OLED will be cleared.
uView.setFontType(1); // Set font type 1: Numbers and letters. 7 characters per line (3 lines)
uView.setCursor(0,20);
uView.print("Don Luc"); // Don Luc
uView.display(); // Display
delay(5000);
uView.clear(PAGE); // Erase the memory buffer, the OLED will be cleared.
uView.setFontType(1); // Set font type 1: Numbers and letters. 7 characters per line (3 lines)
uView.setCursor(0,20);
uView.print("MQ-3"); // Alcohol Gas Sensor - MQ-3
uView.display(); // Display
delay(5000);
uView.clear(PAGE); // Erase the memory buffer, the OLED will be cleared
// NeoPixels
pixels.begin(); // This initializes the NeoPixel library
// LED
pinMode( ledG, OUTPUT ); // LED Green
// LED Green - High
digitalWrite( ledG, HIGH);
}
Don Luc
LED – Infrared 950nm
Infrared LEDs are used for remote controls and ‘night-vision’ cameras, and these little blue guys are high powered ones. They are 950nm wavelength, which is what nearly all devices listen to.
The IR LED (or infrared light-emitting diode) Bit sends out light with longer wavelengths than visible light, similar to the light in your remote control. It’s invisible to the eye, but many digital cameras can see it. Try using it to activate the light sensor or remote trigger.
In short, LEDs are like tiny lightbulbs. However, LEDs require a lot less power to light up by comparison. They’re also more energy efficient, so they don’t tend to get hot like conventional lightbulbs do (unless you’re really pumping power into them). This makes them ideal for mobile devices and other low-power applications.
Technical Details
* 5mm LED
* 950nm wavelength (most common)
* 20 degree beam width
LED – Infrared 950nm
5 x Powerful IR LEDs GP54
5 x 30 Ohm
1 x Battery Holder 2xAAA with Cover and Switch
2 x Battery AAA
1 x Half-Size Breadboard
5 x Jumper Wires 3″ M/M
Don Luc
Project #6: MicroView – EMF Meter (Single Axis) – Mk08
Electromagnetic Field
An electromagnetic field (also EMF or EM field) is a physical field produced by electrically charged objects. It affects the behavior of charged objects in the vicinity of the field. The electromagnetic field extends indefinitely throughout space and describes the electromagnetic interaction. It is one of the four fundamental forces of nature (the others are gravitation, weak interaction and strong interaction).
The field can be viewed as the combination of an electric field and a magnetic field. The electric field is produced by stationary charges, and the magnetic field by moving charges (currents); these two are often described as the sources of the field. The way in which charges and currents interact with the electromagnetic field is described by Maxwell’s equations and the Lorentz force law. The force created by the electric field is much stronger than the force created by the magnetic field.
From a classical perspective in the history of electromagnetism, the electromagnetic field can be regarded as a smooth, continuous field, propagated in a wavelike manner; whereas from the perspective of quantum field theory, the field is seen as quantized, being composed of individual particles.
EMF Measurement
EMF measurements are measurements of ambient (surrounding) electromagnetic fields that are performed using particular sensors or probes, such as EMF meters. These probes can be generally considered as antennas although with different characteristics. In fact probes should not perturb the electromagnetic field and must prevent coupling and reflection as much as possible in order to obtain precise results. There are two main types of EMF measurements:
* Broadband measurements performed using a broadband probe, that is a device which senses any signal across a wide range of frequencies and is usually made with three independent diode detectors;
* Frequency selective measurements in which the measurement system consists of a field antenna and a frequency selective receiver or spectrum analyzer allowing to monitor the frequency range of interest.
EMF probes may respond to fields only on one axis, or may be tri-axial, showing components of the field in three directions at once. Amplified, active, probes can improve measurement precision and sensitivity but their active components may limit their speed of response.
EMF Meters
An EMF meter is a scientific instrument for measuring electromagnetic fields (abbreviated as EMF). Most meters measure the electromagnetic radiation flux density (DC fields) or the change in an electromagnetic field over time (AC fields), essentially the same as a radio antenna, but with quite different detection characteristics.
The two largest categories are single axis and tri-axis. Single axis meters are cheaper than tri-axis meters, but take longer to complete a survey because the meter only measures one dimension of the field. Single axis instruments have to be tilted and turned on all three axes to obtain a full measurement. A tri-axis meter measures all three axes simultaneously, but these models tend to be more expensive.
Electromagnetic fields can be generated by AC or DC currents. An EMF meter can measure AC electromagnetic fields, which are usually emitted from man-made sources such as electrical wiring, while gaussmeters or magnetometers measure DC fields, which occur naturally in Earth’s geomagnetic field and are emitted from other sources where direct current is present.
EMF Meter (Single Axis)
1 x MicroView
1 x MicroView – USB Programmer
1 x DS18S20
1 x NeoPixel Stick – 8 x 5050 RGB LED
1 x Speaker
1 x LED Red
1 x LED Green
1 x LED Yellow
1 x 330 Ohm
1 x 1.5k Ohm
1 x 3.3M Ohm
1 x 3″ Wire Solid Core, 22 AWG
1 x 4 Header
20 x Jumper Wires 3″ M/M
1 x Half-Size Breadboard
1 x Battery Holder 3xAAA with Cover and Switch
3 x Battery AAA
MicroView
WIRE – PIN 02 – Analog A5
GND – PIN 08 – GND
VIN – PIN 15 – +5V
TEM – PIN 14 – Digital 5
SPE – PIN 13 – Digital 4
NEO – PIN 12 – Digital 3
LEDG – PIN 11 – Digital 2
LEDY – PIN 10 – Digital 1
LEDR – PIN 09 – Digital 0
DonLuc1806Mk01
DonLuc1806Mk01a.ino
// ***** Don Luc *****
// Software Version Information
// Project #6: MicroView - EMF Meter (Single Axis) - Mk08
// 6.1
// DonLuc1806Mk01 6-1
// MicroView
// EMF Meter (Single Axis)
// include the library code:
#include <MicroView.h>
#include <Adafruit_NeoPixel.h>
// Pitches
#include "pitches.h"
#include <OneWire.h>
// EMF Meter (Single Axis)
#define NUMREADINGS 15 // Raise this number to increase data smoothing
int senseLimit = 15; // Raise this number to decrease sensitivity (up to 1023 max)
int val = 0; // Val
int iEMF = A5; // EMF Meter
int readings[ NUMREADINGS ]; // Readings from the analog input
int index = 0; // Index of the current reading
int total = 0; // Running total
int average = 0; // Final average of the probe reading
// NeoPixels
#define PIN 3 // On digital pin 3
#define NUMPIXELS 8 // NeoPixels NUMPIXELS = 8
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
int red = 0; // Red
int green = 0; // Green
int blue = 0; // Blue
int iNeo = 0; // Neopix
int iBri = 0; // Neopix Brightness
// LED
int ledR = 0; // LED Red
int ledG = 1; // LED Green
int ledY = 2; // LED Yellow
// 8-ohm speaker
#define tonePIN 5 // On digital pin 5
// Temperature chip i/o
int DS18S20_Pin = 6; // DS18S20 Signal pin on digital 6
OneWire ds(DS18S20_Pin); // On digital pin 6
float temperature = 0; // Temperature
void loop() {
// EMF Meter (Single Axis)
isEMF();
delay(250);
uView.clear(PAGE); // Erase the memory buffer, the OLED will be cleared
}
getEMF.ino
// EMF Meter (Single Axis)
void isEMF(){
// LEDs - Low
for(int z=0; z<NUMPIXELS; z++){
// Black
red = 0; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = z; // Neopix
iBri = 0; // Neopix Brightness
neopix();
}
digitalWrite(ledG, LOW); // Turn that LED off
digitalWrite(ledY, LOW); // Turn that LED off
noTone(tonePIN); // noTone
// Probe
val = analogRead( iEMF ); // Take a reading from the probe
if( val >= 1 ){ // If the reading isn't zero, proceed
val = constrain( val, 1, senseLimit ); // Turn any reading higher than the senseLimit value into the senseLimit value
val = map( val, 1, senseLimit, 1, 1023 ); // Remap the constrained value within a 1 to 1023 range
total -= readings[ index ]; // Subtract the last reading
readings[ index ] = val; // Read from the sensor
total += readings[ index ]; // Add the reading to the total
index = ( index + 1 ); // Advance to the next index
if ( index >= NUMREADINGS ) { // If we're at the end of the array...
index = 0; // ...wrap around to the beginning
}
average = total / NUMREADINGS; // Calculate the average
if (average < 50) { // If the average is less 50 ...
digitalWrite(ledG, HIGH); // turn that LED On
tone(tonePIN, NOTE_C3); // Tone
}
else{ // and if it's not ...
digitalWrite(ledG, LOW); // turn that LED off
noTone(tonePIN); // noTone
}
if (average > 50){ // If the average is over 50 ...
// Green
red = 0; // Red
green = 255; // Green
blue = 0; // Blue
iNeo = 0; // Neopix
iBri = 100; // Neopix Brightness
neopix();
tone(tonePIN, NOTE_C4); // Tone
}
else{ // and if it's not ...
// Black
red = 0; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 0; // Neopix
iBri = 0; // Neopix Brightness
neopix();
noTone(tonePIN); // noTone
}
if (average > 250){ // and so on ...
// Green
red = 0; // Red
green = 255; // Green
blue = 0; // Blue
iNeo = 1; // Neopix
iBri = 100; // Neopix Brightness
neopix();
tone(tonePIN, NOTE_D4); // Tone
}
else{
// Black
red = 0; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 1; // Neopix
iBri = 0; // Neopix Brightness
neopix();
noTone(tonePIN); // noTone
}
if (average > 350){
// Green
red = 0; // Red
green = 255; // Green
blue = 0; // Blue
iNeo = 2; // Neopix
iBri = 100; // Neopix Brightness
neopix();
tone(tonePIN, NOTE_E4); // Tone
}
else{
// Black
red = 0; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 1; // Neopix
iBri = 0; // Neopix Brightness
neopix();
noTone(tonePIN); // noTone
}
if (average > 500){
// Yellow
red = 255; // Red
green = 255; // Green
blue = 0; // Blue
iNeo = 3; // Neopix
iBri = 100; // Neopix Brightness
neopix();
tone(tonePIN, NOTE_F4); // Tone
}
else{
// Black
red = 0; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 3; // Neopix
iBri = 0; // Neopix Brightness
neopix();
noTone(tonePIN); // noTone
}
if (average > 650){
// Yellow
red = 255; // Red
green = 255; // Green
blue = 0; // Blue
iNeo = 4; // Neopix
iBri = 100; // Neopix Brightness
neopix();
tone(tonePIN, NOTE_G4); // Tone
}
else{
// Black
red = 0; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 4; // Neopix
iBri = 0; // Neopix Brightness
neopix();
noTone(tonePIN); // noTone
}
if (average > 750){
// Yellow
red = 255; // Red
green = 255; // Green
blue = 0; // Blue
iNeo = 5; // Neopix
iBri = 100; // Neopix Brightness
neopix();
tone(tonePIN, NOTE_A4); // Tone
}
else{
// Black
red = 0; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 5; // Neopix
iBri = 0; // Neopix Brightness
neopix();
noTone(tonePIN); // noTone
}
if (average > 850){
// Red
red = 255; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 6; // Neopix
iBri = 100; // Neopix Brightness
neopix();
tone(tonePIN, NOTE_B4); // Tone
}
else{
// Black
red = 0; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 6; // Neopix
iBri = 0; // Neopix Brightness
neopix();
noTone(tonePIN); // noTone
}
if (average > 950){
// Red
red = 255; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 7; // Neopix
iBri = 100; // Neopix Brightness
neopix();
tone(tonePIN, NOTE_C5); // Tone
}
else{
// Black
red = 0; // Red
green = 0; // Green
blue = 0; // Blue
iNeo = 7; // Neopix
iBri = 0; // Neopix Brightness
neopix();
noTone(tonePIN); // noTone
}
}
else
{
digitalWrite(ledY, HIGH); // turn that LED On
noTone(tonePIN); // noTone
}
uView.setFontType(0); // Set font type 0: Numbers and letters. 10 characters per line (6 lines)
uView.setCursor(0,10); // EMF Meter
uView.print( "EMF: " );
uView.print( average );
// Temperature chip i/o
isTe();
uView.display(); // Display
}
getTemperature.ino
// Temperature chip i/o
void isTe() {
// Temperature chip i/o
temperature = getTemp();
uView.setCursor(0,30);
uView.print(temperature);
uView.print(" *C");
}
float getTemp() {
// Returns the temperature from one DS18S20 in DEG Celsius
byte data[12];
byte addr[8];
if ( !ds.search(addr)) {
// No more sensors on chain, reset search
ds.reset_search();
return -1001;
}
if ( OneWire::crc8( addr, 7) != addr[7]) {
return -1002;
}
if ( addr[0] != 0x10 && addr[0] != 0x28) {
return -1003;
}
ds.reset();
ds.select(addr);
ds.write(0x44,1); // Start conversion, with parasite power on at the end
byte present = ds.reset();
ds.select(addr);
ds.write(0xBE); // Read Scratchpad
for (int i = 0; i < 9; i++) { // we need 9 bytes
data[i] = ds.read();
}
ds.reset_search();
byte MSB = data[1];
byte LSB = data[0];
float tempRead = ((MSB << 8) | LSB); // Using two's compliment
float TemperatureSum = tempRead / 16;
return TemperatureSum;
}
neopix.ino
void neopix() {
// Brightness
pixels.setBrightness( iBri );
// Pixels.Color takes RGB values, from 0,0,0 up to 255,255,255
pixels.setPixelColor( iNeo, pixels.Color(red,green,blue) );
// This sends the updated pixel color to the hardware
pixels.show();
// Delay for a period of time (in milliseconds)
delay(50);
}
pitches.h
/************************************************* * Public Constants *************************************************/ // Note #define NOTE_B0 31 #define NOTE_C1 33 #define NOTE_CS1 35 #define NOTE_D1 37 #define NOTE_DS1 39 #define NOTE_E1 41 #define NOTE_F1 44 #define NOTE_FS1 46 #define NOTE_G1 49 #define NOTE_GS1 52 #define NOTE_A1 55 #define NOTE_AS1 58 #define NOTE_B1 62 #define NOTE_C2 65 #define NOTE_CS2 69 #define NOTE_D2 73 #define NOTE_DS2 78 #define NOTE_E2 82 #define NOTE_F2 87 #define NOTE_FS2 93 #define NOTE_G2 98 #define NOTE_GS2 104 #define NOTE_A2 110 #define NOTE_AS2 117 #define NOTE_B2 123 #define NOTE_C3 131 #define NOTE_CS3 139 #define NOTE_D3 147 #define NOTE_DS3 156 #define NOTE_E3 165 #define NOTE_F3 175 #define NOTE_FS3 185 #define NOTE_G3 196 #define NOTE_GS3 208 #define NOTE_A3 220 #define NOTE_AS3 233 #define NOTE_B3 247 #define NOTE_C4 262 #define NOTE_CS4 277 #define NOTE_D4 294 #define NOTE_DS4 311 #define NOTE_E4 330 #define NOTE_F4 349 #define NOTE_FS4 370 #define NOTE_G4 392 #define NOTE_GS4 415 #define NOTE_A4 440 #define NOTE_AS4 466 #define NOTE_B4 494 #define NOTE_C5 523 #define NOTE_CS5 554 #define NOTE_D5 587 #define NOTE_DS5 622 #define NOTE_E5 659 #define NOTE_F5 698 #define NOTE_FS5 740 #define NOTE_G5 784 #define NOTE_GS5 831 #define NOTE_A5 880 #define NOTE_AS5 932 #define NOTE_B5 988 #define NOTE_C6 1047 #define NOTE_CS6 1109 #define NOTE_D6 1175 #define NOTE_DS6 1245 #define NOTE_E6 1319 #define NOTE_F6 1397 #define NOTE_FS6 1480 #define NOTE_G6 1568 #define NOTE_GS6 1661 #define NOTE_A6 1760 #define NOTE_AS6 1865 #define NOTE_B6 1976 #define NOTE_C7 2093 #define NOTE_CS7 2217 #define NOTE_D7 2349 #define NOTE_DS7 2489 #define NOTE_E7 2637 #define NOTE_F7 2794 #define NOTE_FS7 2960 #define NOTE_G7 3136 #define NOTE_GS7 3322 #define NOTE_A7 3520 #define NOTE_AS7 3729 #define NOTE_B7 3951 #define NOTE_C8 4186 #define NOTE_CS8 4435 #define NOTE_D8 4699 #define NOTE_DS8 4978
setup.ino
void setup() {
uView.begin(); // Begin of MicroView
uView.clear(ALL); // Erase hardware memory inside the OLED controller
uView.display(); // Display the content in the buffer memory, by default it is the MicroView logo
delay(1000);
uView.clear(PAGE); // Erase the memory buffer, the OLED will be cleared.
uView.setFontType(1); // Set font type 1: Numbers and letters. 7 characters per line (3 lines)
uView.setCursor(0,20);
uView.print("Don Luc"); // Don Luc
uView.display(); // Display
delay(5000);
uView.clear(PAGE); // Erase the memory buffer, the OLED will be cleared.
uView.setFontType(1); // Set font type 1: Numbers and letters. 7 characters per line (3 lines)
uView.setCursor(0,20);
uView.print("EMF Met"); // EMF Meter (Single Axis)
uView.display(); // Display
delay(5000);
uView.clear(PAGE); // Erase the memory buffer, the OLED will be cleared
// NeoPixels
pixels.begin(); // This initializes the NeoPixel library
// EMF Meter (Single Axis)
pinMode( iEMF, OUTPUT ); // EMF Meter
for (int i = 0; i < NUMREADINGS; i++){
readings[ i ] = 0; // Initialize all the readings to 0
}
// LED
pinMode( ledR, OUTPUT ); // LED Red
pinMode( ledG, OUTPUT ); // LED Green
pinMode( ledY, OUTPUT ); // LED Yellow
// LED Red - High
digitalWrite( ledR, HIGH);
}
Don Luc
Project #7: RGB LCD Shield – PIR Motion Sensor – Mk03
PIR Motion Sensor
This is a simple to use motion sensor. Power it up and wait 1-2 seconds for the sensor to get a snapshot of the still room. If anything moves after that period, the ‘alarm’ pin will go low.
This unit works great from 5 to 12V (datasheet shows 12V). You can also install a jumper wire past the 5V regulator on board to make this unit work at 3.3V. Sensor uses 1.6mA@3.3V.
The alarm pin is an open collector meaning you will need a pull up resistor on the alarm pin. The open drain setup allows multiple motion sensors to be connected on a single input pin. If any of the motion sensors go off, the input pin will be pulled low.
We’ve finally updated the connector! Gone is the old “odd” connector, now you will find a common 3-pin JST! This makes the PIR Sensor much more accessible for whatever your project may need. Red = Power, White = Ground, and Black = Alarm.
Buzzer
This is a small 12mm round speaker that operates around the audible 2kHz range. You can use these speakers to create simple music or user interfaces.
This is not a true piezoelectric speaker but behaves similarly. Instead of a piezoelectric crystal that vibrates with an electric current, this tiny speaker uses an electromagnet to drive a thin metal sheet. That means you need to use some form of alternating current to get sound. The good news is that this speaker is tuned to respond best with a square wave (e.g. from a microcontroller).
LED
LED Yellow
LED Green
DonLuc1805Mk07
1 x RGB LCD Shield 16×2 Character Display
1 x Arduino UNO – R3
1 x ProtoScrewShield
1 x PIR Motion Sensor
1 x Buzzer
1 x LED Yellow
1 x LED Green
2 x Jumper Wires 2″ M/F
4 x Jumper Wires 3″ M/M
5 x Jumper Wires 6″ M/M
1 x Half-Size Breadboard
Arduino UNO
JST – Digital 6
BUZ – Digital 2
LEY – Digital 1
LEG – Digital 0
VIN – +5V
GND – GND
DonLuc1805Mk07a.ino
// ***** Don Luc *****
// Software Version Information
// Project #7: RGB LCD Shield – PIR Motion Sensor - Mk03
// 5-3.01
// DonLuc1804Mk07 5-3.01
// RGB LCD Shield
// PIR Motion Sensor (JST}
// include the library code:
#include <Adafruit_MCP23017.h>
#include <Adafruit_RGBLCDShield.h>
Adafruit_RGBLCDShield RGBLCDShield = Adafruit_RGBLCDShield();
#define GREEN 0x2
// PIR Motion Sensor (JST}
const int buz = 6; // Buzzer
const int MOTION_PIN = 2; // Pin connected to motion detector
const int LED_Yellow = 1; // LED Yellow
const int LED_Green = 0; // LED Green
void loop() {
// PIR Motion Sensor (JST}
isJST();
delay(1000);
// Clear
RGBLCDShield.clear();
}
getJST.ino
void isJST(){
int proximity = digitalRead(MOTION_PIN); // PIR Motion Sensor
if (proximity == LOW) // If the sensor's output goes low, motion is detected
{
// Motion Detected
digitalWrite(buz, HIGH); // Buzzer High
digitalWrite(LED_Yellow, HIGH); // LED Yellow High
digitalWrite(LED_Green, LOW); // LED Green Low
// Display
// Set the cursor to column 0, line 0
RGBLCDShield.setCursor(0,0);
RGBLCDShield.print("Motion Detected!"); // Motion Detected!
// Set the cursor to column 0, line 1
RGBLCDShield.setCursor(0, 1);
RGBLCDShield.print("Buzzer On - Yel"); // Buzzer On
}
else
{
// Motion Off
digitalWrite(buz, LOW); // Buzzer Low
digitalWrite(LED_Yellow, LOW); // LED Yellow Low
digitalWrite(LED_Green, HIGH); // LED Green High
// Display
// Set the cursor to column 0, line 0
RGBLCDShield.setCursor(0,0);
RGBLCDShield.print("Motion Off!"); // Motion Off!
// Set the cursor to column 0, line 1
RGBLCDShield.setCursor(0, 1);
RGBLCDShield.print("Buzzer Off - Gr"); // "Buzzer Off
}
}
setup.ino
void setup() {
// set up the LCD's number of columns and rows:
RGBLCDShield.begin(16, 2);
RGBLCDShield.setBacklight(GREEN);
// Display
// Set the cursor to column 0, line 0
RGBLCDShield.setCursor(0,0);
RGBLCDShield.print("Don Luc"); // Don luc
// Set the cursor to column 0, line 1
RGBLCDShield.setCursor(0, 1);
RGBLCDShield.print("Motion Sensor"); // Motion Sensor
delay(5000);
// Clear
RGBLCDShield.clear();
// PIR Motion Sensor (JST}
pinMode(buz, OUTPUT); // Buzzer
pinMode(MOTION_PIN, INPUT_PULLUP); // PIR Motion Sensor
pinMode(LED_Yellow, OUTPUT); // LED Yellow
pinMode(LED_Green, OUTPUT); // LED Green
}
Don Luc
Project #6: MicroView – RHT03 Sensor – Mk07
RHT03 Humidity and Temperature Sensor
The RHT03 (also known by DHT-22) is a low cost humidity and temperature sensor with a single wire digital interface. The sensor is calibrated and doesn’t require extra components so you can get right to measuring relative humidity and temperature.
Features
* 3.3-6V Input
* 1-1.5mA measuring current
* 40-50 uA standby current
* Humidity from 0-100% RH
* -40 – 80 degrees C temperature range
* +-2% RH accuracy
* +-0.5 degrees C
Technical Specification
Model: RHT03
Power supply: 3.3-6V DC
Output signal: Digital signal via MaxDetect 1-wire bus
Sensing element: Polymer humidity capacitor
Operating range: Humidity 0-100%RH; Temperature -40~80C
Accuracy: humidity +-2%RH(Max +-5%RH); Temperature +-0.5C
Resolution or sensitivity: Humidity 0.1%RH; Temperature 0.1C
Repeatability: Humidity +-1%RH; Temperature +-0.2C – Humidity hysteresis – +-0.3%RH
Long-term Stability: +-0.5%RH/year
Interchangeability: Fully interchangeable
DonLuc1805Mk06
1 x MicroView
1 x MicroView – USB Programmer
1 x RHT03
3 x Jumper Wires 3″ M/M
1 x Half-Size Breadboard
MicroView
RHT – PIN 11 – Digital 2
VIN – PIN 15 – +5V
GND – PIN 08 – GND
DonLuc1805Mk06a.ino
// ***** Don Luc *****
// Software Version Information
// 7.01
// DonLuc1804Mk07 7.01
// MicroView
// RHT03 Humidity and Temperature Sensor
// include the library code:
#include <MicroView.h>
#include <SparkFun_RHT03.h>
// RHT Humidity and Temperature Sensor
const int RHT03_DATA_PIN = 2; // RHT03 data pin Digital 2
RHT03 rht; // This creates a RTH03 object, which we'll use to interact with the sensor
void loop() {
// RHT03 Humidity and Temperature Sensor
isRHT03();
delay(1000);
uView.clear(PAGE); // Erase the memory buffer, the OLED will be cleared
}
getRHT.ino
// RHT03 Humidity and Temperature Sensor
void isRHT03(){
// Call rht.update() to get new humidity and temperature values from the sensor.
int updateRet = rht.update();
// The humidity(), tempC(), and tempF() functions can be called -- after
// a successful update() -- to get the last humidity and temperature
// value
float latestHumidity = rht.humidity();
float latestTempC = rht.tempC();
float latestTempF = rht.tempF();
uView.setFontType(0); // Set font type 0: Numbers and letters. 10 characters per line (6 lines)
uView.setCursor(0,10); // Humidity
uView.print( "H : " );
uView.print( latestHumidity );
uView.setCursor(0,20); // Temperature *C
uView.print( "*C: " );
uView.print( latestTempC );
uView.setCursor(0,30); // "Temperature *F
uView.print( "*F: " );
uView.print( latestTempF );
uView.display(); // Display
}
setup.ino
void setup() {
uView.begin(); // Begin of MicroView
uView.clear(ALL); // Erase hardware memory inside the OLED controller
uView.display(); // Display the content in the buffer memory, by default it is the MicroView logo
delay(1000);
uView.clear(PAGE); // Erase the memory buffer, the OLED will be cleared.
uView.setFontType(1); // Set font type 1: Numbers and letters. 7 characters per line (3 lines)
uView.setCursor(0,20);
uView.print("Don Luc"); // Don Luc
uView.display(); // Display
delay(5000);
uView.clear(PAGE); // Erase the memory buffer, the OLED will be cleared.
uView.setFontType(1); // Set font type 1: Numbers and letters. 7 characters per line (3 lines)
uView.setCursor(0,20);
uView.print("RHT03"); // RHT03
uView.display(); // Display
delay(5000);
uView.clear(PAGE); // Erase the memory buffer, the OLED will be cleared
// RHT03 Humidity and Temperature Sensor
// Call rht.begin() to initialize the sensor and our data pin
rht.begin(RHT03_DATA_PIN);
}
Don Luc
Project #6: MicroView – Accelerometer ADXL335 – Mk06
Accelerometer
An accelerometer is a device that measures proper acceleration. Proper acceleration, being the acceleration (or rate of change of velocity) of a body in its own instantaneous rest frame, is not the same as coordinate acceleration, being the acceleration in a fixed coordinate system. For example, an accelerometer at rest on the surface of the Earth will measure an acceleration due to Earth’s gravity, straight upwards (by definition) of g = 9.81 m/s2. By contrast, accelerometers in free fall (falling toward the center of the Earth at a rate of about 9.81 m/s2) will measure zero.
Triple Axis Accelerometer Breakout – ADXL335
Breakout board for the 3 axis ADXL335 from Analog Devices. This is the latest in a long, proven line of analog sensors – the holy grail of accelerometers. The ADXL335 is a triple axis MEMS accelerometer with extremely low noise and power consumption – only 320uA! The sensor has a full sensing range of +/-3g. There is no on-board regulation, provided power should be between 1.8 and 3.6VDC. Board comes fully assembled and tested with external components installed. The included 0.1uF capacitors set the bandwidth of each axis to 50Hz.
DonLuc1805Mk05
1 x MicroView
1 x MicroView – USB Programmer
1 x Accelerometer ADXL335
5 x Jumper Wires 3″ M/M
1 x Half-Size Breadboard
MicroView
Z-Axis – PIN 07 – Analog A0
Y-Axis – PIN 06 – Analog A1
X-Axis – PIN 05 – Analog A2
VIN – PIN 16 – 3.3V
GND – PIN 08 – GND
DonLuc1805Mk05a.ino
// ***** Don Luc *****
// Software Version Information
// 6.01
// DonLuc1804Mk06 6.01
// MicroView
// Accelerometer ADXL335
// include the library code:
#include <MicroView.h>
#include <ADXL335.h>
// Accelerometer ADXL335
const int pin_x = A0; // X-Axis
const int pin_y = A1; // Y-Axis
const int pin_z = A2; // Z-Axis
const int vin = 16; // 3.3V
const int gnd = 8; // GND
ADXL335 accel(pin_x, pin_y, pin_z, vin);
void loop() {
// Accelerometer ADXL335
isADXL335();
delay(500);
uView.clear(PAGE); // Erase the memory buffer, the OLED will be cleared
}
getADXL335.ino
// Accelerometer ADXL335
void isADXL335(){
// This is required to update the values
accel.update();
float rho;
float phi;
float theta;
rho = accel.getRho();
phi = accel.getPhi();
theta = accel.getTheta();
uView.setFontType(0); // Set font type 0: Numbers and letters. 10 characters per line (6 lines)
uView.setCursor(0,10); // X-Axis
uView.print( "X: " );
uView.print( rho );
uView.setCursor(0,20); // Y-Axis
uView.print( "Y: " );
uView.print( phi );
uView.setCursor(0,30); // Z-Axis
uView.print( "Z: " );
uView.print( theta );
uView.display(); // Display
}
setup.ino
void setup() {
uView.begin(); // Begin of MicroView
uView.clear(ALL); // Erase hardware memory inside the OLED controller
uView.display(); // Display the content in the buffer memory, by default it is the MicroView logo
delay(1000);
uView.clear(PAGE); // Erase the memory buffer, the OLED will be cleared.
uView.setFontType(1); // Set font type 1: Numbers and letters. 7 characters per line (3 lines)
uView.setCursor(0,20);
uView.print("Don Luc"); // Don Luc
uView.display(); // Display
delay(5000);
uView.clear(PAGE); // Erase the memory buffer, the OLED will be cleared.
uView.setFontType(1); // Set font type 1: Numbers and letters. 7 characters per line (3 lines)
uView.setCursor(0,20);
uView.print("ADXL335"); // ADXL335
uView.display(); // Display
delay(5000);
uView.clear(PAGE); // Erase the memory buffer, the OLED will be cleared
// Accelerometer ADXL335
pinMode(gnd, OUTPUT); // GND
pinMode(vin, OUTPUT); // 3.3V
digitalWrite(gnd, LOW);
digitalWrite(vin, HIGH);
}
Don Luc
Programming: Tri-Axis Gyro – L3G4200D – Breadboard
Fritzing: L3G4200D – Arduino UNO
Don Luc