Output devices

This week I made LCD display board and prgraming it.



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LCD test using Arduino

materials
software environment
  • Mac Sierra 10.12.3
  • Arduino IDE 1.6.7
  • resistor 10k

First, I solderd pinsockets on LCD.

I checked datasheet.

Then I planned how to connect LCD and Arduino.Like below.

Then I wrote the skech refer to this site.

But It did not work.

I tried again.I opened Arduino's example skech named Hello echo of LiquidCrystal.

It said this.

				/*
	  LiquidCrystal Library - Hello World

	 Demonstrates the use a 16x2 LCD display.  The LiquidCrystal
	 library works with all LCD displays that are compatible with the
	 Hitachi HD44780 driver. There are many of them out there, and you
	 can usually tell them by the 16-pin interface.

	 This sketch prints "Hello World!" to the LCD
	 and shows the time.

	  The circuit:
	 * LCD RS pin to digital pin 12
	 * LCD Enable pin to digital pin 11
	 * LCD D4 pin to digital pin 5
	 * LCD D5 pin to digital pin 4
	 * LCD D6 pin to digital pin 3
	 * LCD D7 pin to digital pin 2
	 * LCD R/W pin to ground
	 * LCD VSS pin to ground
	 * LCD VCC pin to 5V
	 * 10K resistor:
	 * ends to +5V and ground
	 * wiper to LCD VO pin (pin 3)

	 Library originally added 18 Apr 2008
	 by David A. Mellis
	 library modified 5 Jul 2009
	 by Limor Fried (http://www.ladyada.net)
	 example added 9 Jul 2009
	 by Tom Igoe
	 modified 22 Nov 2010
	 by Tom Igoe

	 This example code is in the public domain.

	 http://www.arduino.cc/en/Tutorial/LiquidCrystal
	 */

	// include the library code:
	#include 

	// initialize the library with the numbers of the interface pins
	LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

	void setup() {
	  // set up the LCD's number of columns and rows:
	  lcd.begin(16, 2);
	  // Print a message to the LCD.
	  lcd.print("hello, world!");
	}

	void loop() {
	  // set the cursor to column 0, line 1
	  // (note: line 1 is the second row, since counting begins with 0):
	  lcd.setCursor(0, 1);
	  // print the number of seconds since reset:
	  lcd.print(millis() / 1000);
	}

Refer to this code, I re-connected.

It said Helo!

These are oder of LiquidCrystal

LiquidCrystal lcd(rs, rw, enable, d4, d5, d6, d7);

making variable of LiquidCrystal.

lcd.begin(16, 2);

Set row and calams.

lcd.print("Hi.");

charactors that printed on LCD.

lcd.clear();clear code.

LCD test using Hello LCD board

I made Hello.LCD board.

materials
  • LCDSD1602VBWB-XA-G
  • FR4
  • pin header (5*2,3*2,2*2)
  • Attiny44-SSU
  • 1 uF capacita
  • resistors(0,1k,10k,100k)
  • 20MHZ cristal
tools
software environment
  • Windows10→×
  • Mac OS??
  • Arduino IDE 1.6.7

I arranged the board because I used 5V power supply. I put regurator off and put there 0Ωresistor.

make board

When I used milling machine, I broke 0.8mm drill. It too thin for cut outline.

I used 45°end mill for trace and 1.0mm drill for outline.

soldering

I solderd components.

And I did not have 10pin cable so I made it.

connect

Then I connected.First I wrote pin number like below.

connect like below...

スケッチ

First I burned bootloader with AVR mark2.I connet AVR ISP and power(5V and GND). When I used windows, It failed. I used Mac, it succeed.

Arduino pin assign and Attiny pin assign is different.

So I change pin number of the skech.

afterLiquidCrystal lcd(5, 7, 4, 3, 2, 1,0);

beforeLiquidCrystal lcd(12, 11, 5, 4, 3, 2);

test

succeed!

Design my LCD board

materials
  • LCDSD1602VBWB-XA-G
  • FR4
  • pin header (5*2,3*2,2*2)
  • Attiny44-SSU
  • 1 uF capacita
  • resistors(1k,10k,100k)
  • 20MHZ cristal
tools
software environment
  • Mac OSMac Sierra 10.12.3
  • Arduino IDE 1.6.7
  • Eagle 8.1.10

board design

I design this board.I refer to hello echo board.

export like this.Tips:We can change screen size "info">screen line click.

milling

I made rml data by fabmodule. Setting was like below.

And I milled it.But it did not work good. The spindole move up and down though it should not move.I do not know why.

Finally I cut it by hands.

soldering

I soldered it.

test

It did not work.I accept error message when I burn bootloader.

I checked my board by a multimeter.Its shorted.I removed solder and put components off. Milling was not going well and the lines to be separated could not be separated. I removed these parts. Then It work!