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PJRC Store
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Teensy 3.1, $19.80
Teensy 2.0, $16.00
Teensy++ 2.0, $24.00
USB Cable, $4.00
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Teensy
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Main Page
Teensy 3.1
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Teensyduino
Flight Ear Pressure Relief Fix [OFFICIAL - METHOD]
During takeoff, cabin air pressure drops quickly. During landing, it rises just as fast. If your Eustachian tube is swollen from allergies, a cold, or simply slow to react, the pressure gets trapped. Your eardrum then stretches like a drum skin—and that stretching is the pain you feel.
Welcome to "airplane ear," also known as barotrauma. While rarely dangerous, it can turn a relaxing flight into a painful ordeal. The good news? You don’t have to suffer in silence. Here is everything you need to know about why it happens and, more importantly, how to fix it fast. The culprit is air pressure. Your ear has a narrow tube called the Eustachian tube that connects your middle ear to the back of your throat. This tube’s job is to equalize the pressure inside your ear with the pressure outside. flight ear pressure relief
There you are: 35,000 feet above the ocean, watching a movie, when suddenly it hits. Your ears feel like they’re stuffed with cotton, your hearing muffles, and a dull ache creeps into your jaw. You try to swallow, you try to yawn—but nothing happens. During takeoff, cabin air pressure drops quickly
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Flight Ear Pressure Relief Fix [OFFICIAL - METHOD]
This library
supports the Small OLED displays sold by Adafruit Industries.
Download: Adafruit_SSD1306.zip
Hardware Requirements
Adafruit sells these OLED displays in I2C and SPI interface.
Adafruit 128x32 SPI OLED with Teensy 3.1
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Adafruit 128x32 I2C OLED with Teensy 3.0
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See below for the reverse-side wiring.
32 vs 64 Pixel Height
You may need to edit Adafruit_SSD1306.h to set the display height.
Look for this code and uncomment either 64 or 32 pixel height.
/*=========================================================================
SSD1306 Displays
-----------------------------------------------------------------------
The driver is used in multiple displays (128x64, 128x32, etc.).
Select the appropriate display below to create an appropriately
sized framebuffer, etc.
SSD1306_128_64 128x64 pixel display
SSD1306_128_32 128x32 pixel display
-----------------------------------------------------------------------*/
// #define SSD1306_128_64
#define SSD1306_128_32
/*=========================================================================*/
Example Program
This example program comes with the library. You can open it from the
File -> Examples -> Adafruit_SSD1306 -> ssd1306_128x32_spi menu.
/*********************************************************************
This is an example for our Monochrome OLEDs based on SSD1306 drivers
Pick one up today in the adafruit shop!
------> http://www.adafruit.com/category/63_98
This example is for a 128x32 size display using SPI to communicate
4 or 5 pins are required to interface
Adafruit invests time and resources providing this open source code,
please support Adafruit and open-source hardware by purchasing
products from Adafruit!
Written by Limor Fried/Ladyada for Adafruit Industries.
BSD license, check license.txt for more information
All text above, and the splash screen must be included in any redistribution
*********************************************************************/
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
// If using software SPI (the default case):
#define OLED_MOSI 9
#define OLED_CLK 10
#define OLED_DC 11
#define OLED_CS 12
#define OLED_RESET 13
Adafruit_SSD1306 display(OLED_MOSI, OLED_CLK, OLED_DC, OLED_RESET, OLED_CS);
/* Uncomment this block to use hardware SPI
#define OLED_DC 6
#define OLED_CS 7
#define OLED_RESET 8
Adafruit_SSD1306 display(OLED_DC, OLED_RESET, OLED_CS);
*/
#define NUMFLAKES 10
#define XPOS 0
#define YPOS 1
#define DELTAY 2
#define LOGO16_GLCD_HEIGHT 16
#define LOGO16_GLCD_WIDTH 16
static const unsigned char PROGMEM logo16_glcd_bmp[] =
{ B00000000, B11000000,
B00000001, B11000000,
B00000001, B11000000,
B00000011, B11100000,
B11110011, B11100000,
B11111110, B11111000,
B01111110, B11111111,
B00110011, B10011111,
B00011111, B11111100,
B00001101, B01110000,
B00011011, B10100000,
B00111111, B11100000,
B00111111, B11110000,
B01111100, B11110000,
B01110000, B01110000,
B00000000, B00110000 };
#if (SSD1306_LCDHEIGHT != 32)
#error("Height incorrect, please fix Adafruit_SSD1306.h!");
#endif
void setup() {
Serial.begin(9600);
// by default, we'll generate the high voltage from the 3.3v line internally! (neat!)
display.begin(SSD1306_SWITCHCAPVCC);
// init done
display.display(); // show splashscreen
delay(2000);
display.clearDisplay(); // clears the screen and buffer
// draw a single pixel
display.drawPixel(10, 10, WHITE);
display.display();
delay(2000);
display.clearDisplay();
// draw many lines
testdrawline();
display.display();
delay(2000);
display.clearDisplay();
// draw rectangles
testdrawrect();
display.display();
delay(2000);
display.clearDisplay();
// draw multiple rectangles
testfillrect();
display.display();
delay(2000);
display.clearDisplay();
// draw mulitple circles
testdrawcircle();
display.display();
delay(2000);
display.clearDisplay();
// draw a white circle, 10 pixel radius
display.fillCircle(display.width()/2, display.height()/2, 10, WHITE);
display.display();
delay(2000);
display.clearDisplay();
testdrawroundrect();
delay(2000);
display.clearDisplay();
testfillroundrect();
delay(2000);
display.clearDisplay();
testdrawtriangle();
delay(2000);
display.clearDisplay();
testfilltriangle();
delay(2000);
display.clearDisplay();
// draw the first ~12 characters in the font
testdrawchar();
display.display();
delay(2000);
display.clearDisplay();
// draw scrolling text
testscrolltext();
delay(2000);
display.clearDisplay();
// text display tests
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(0,0);
display.println("Hello, world!");
display.setTextColor(BLACK, WHITE); // 'inverted' text
display.println(3.141592);
display.setTextSize(2);
display.setTextColor(WHITE);
display.print("0x"); display.println(0xDEADBEEF, HEX);
display.display();
delay(2000);
// miniature bitmap display
display.clearDisplay();
display.drawBitmap(30, 16, logo16_glcd_bmp, 16, 16, 1);
display.display();
// invert the display
display.invertDisplay(true);
delay(1000);
display.invertDisplay(false);
delay(1000);
// draw a bitmap icon and 'animate' movement
testdrawbitmap(logo16_glcd_bmp, LOGO16_GLCD_HEIGHT, LOGO16_GLCD_WIDTH);
}
void loop() {
}
void testdrawbitmap(const uint8_t *bitmap, uint8_t w, uint8_t h) {
uint8_t icons[NUMFLAKES][3];
// initialize
for (uint8_t f=0; f< NUMFLAKES; f++) {
icons[f][XPOS] = random(display.width());
icons[f][YPOS] = 0;
icons[f][DELTAY] = random(5) + 1;
Serial.print("x: ");
Serial.print(icons[f][XPOS], DEC);
Serial.print(" y: ");
Serial.print(icons[f][YPOS], DEC);
Serial.print(" dy: ");
Serial.println(icons[f][DELTAY], DEC);
}
while (1) {
// draw each icon
for (uint8_t f=0; f< NUMFLAKES; f++) {
display.drawBitmap(icons[f][XPOS], icons[f][YPOS], logo16_glcd_bmp, w, h, WHITE);
}
display.display();
delay(200);
// then erase it + move it
for (uint8_t f=0; f< NUMFLAKES; f++) {
display.drawBitmap(icons[f][XPOS], icons[f][YPOS], logo16_glcd_bmp, w, h, BLACK);
// move it
icons[f][YPOS] += icons[f][DELTAY];
// if its gone, reinit
if (icons[f][YPOS] > display.height()) {
icons[f][XPOS] = random(display.width());
icons[f][YPOS] = 0;
icons[f][DELTAY] = random(5) + 1;
}
}
}
}
void testdrawchar(void) {
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(0,0);
for (uint8_t i=0; i < 168; i++) {
if (i == '\n') continue;
display.write(i);
if ((i > 0) && (i % 21 == 0))
display.println();
}
display.display();
}
void testdrawcircle(void) {
for (int16_t i=0; i<display.height(); i+=2) {
display.drawCircle(display.width()/2, display.height()/2, i, WHITE);
display.display();
}
}
void testfillrect(void) {
uint8_t color = 1;
for (int16_t i=0; i<display.height()/2; i+=3) {
// alternate colors
display.fillRect(i, i, display.width()-i*2, display.height()-i*2, color%2);
display.display();
color++;
}
}
void testdrawtriangle(void) {
for (int16_t i=0; i<min(display.width(),display.height())/2; i+=5) {
display.drawTriangle(display.width()/2, display.height()/2-i,
display.width()/2-i, display.height()/2+i,
display.width()/2+i, display.height()/2+i, WHITE);
display.display();
}
}
void testfilltriangle(void) {
uint8_t color = WHITE;
for (int16_t i=min(display.width(),display.height())/2; i>0; i-=5) {
display.fillTriangle(display.width()/2, display.height()/2-i,
display.width()/2-i, display.height()/2+i,
display.width()/2+i, display.height()/2+i, WHITE);
if (color == WHITE) color = BLACK;
else color = WHITE;
display.display();
}
}
void testdrawroundrect(void) {
for (int16_t i=0; i<display.height()/2-2; i+=2) {
display.drawRoundRect(i, i, display.width()-2*i, display.height()-2*i, display.height()/4, WHITE);
display.display();
}
}
void testfillroundrect(void) {
uint8_t color = WHITE;
for (int16_t i=0; i<display.height()/2-2; i+=2) {
display.fillRoundRect(i, i, display.width()-2*i, display.height()-2*i, display.height()/4, color);
if (color == WHITE) color = BLACK;
else color = WHITE;
display.display();
}
}
void testdrawrect(void) {
for (int16_t i=0; i<display.height()/2; i+=2) {
display.drawRect(i, i, display.width()-2*i, display.height()-2*i, WHITE);
display.display();
}
}
void testdrawline() {
for (int16_t i=0; i<display.width(); i+=4) {
display.drawLine(0, 0, i, display.height()-1, WHITE);
display.display();
}
for (int16_t i=0; i<display.height(); i+=4) {
display.drawLine(0, 0, display.width()-1, i, WHITE);
display.display();
}
delay(250);
display.clearDisplay();
for (int16_t i=0; i<display.width(); i+=4) {
display.drawLine(0, display.height()-1, i, 0, WHITE);
display.display();
}
for (int16_t i=display.height()-1; i>=0; i-=4) {
display.drawLine(0, display.height()-1, display.width()-1, i, WHITE);
display.display();
}
delay(250);
display.clearDisplay();
for (int16_t i=display.width()-1; i>=0; i-=4) {
display.drawLine(display.width()-1, display.height()-1, i, 0, WHITE);
display.display();
}
for (int16_t i=display.height()-1; i>=0; i-=4) {
display.drawLine(display.width()-1, display.height()-1, 0, i, WHITE);
display.display();
}
delay(250);
display.clearDisplay();
for (int16_t i=0; i<display.height(); i+=4) {
display.drawLine(display.width()-1, 0, 0, i, WHITE);
display.display();
}
for (int16_t i=0; i<display.width(); i+=4) {
display.drawLine(display.width()-1, 0, i, display.height()-1, WHITE);
display.display();
}
delay(250);
}
void testscrolltext(void) {
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(10,0);
display.clearDisplay();
display.println("scroll");
display.display();
display.startscrollright(0x00, 0x0F);
delay(2000);
display.stopscroll();
delay(1000);
display.startscrollleft(0x00, 0x0F);
delay(2000);
display.stopscroll();
delay(1000);
display.startscrolldiagright(0x00, 0x07);
delay(2000);
display.startscrolldiagleft(0x00, 0x07);
delay(2000);
display.stopscroll();
}
Adafruit 128x32 I2C Wiring
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Adafruit 128x32 SPI Wiring
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