i have bought a new 4X20 LCD screen
when i put the Ethernet shield on
i have bought a new 4X20 LCD screen, after hours of trying to wire it and stuff it worked However when i put the Ethernet shield on the top of my Arduino board and wire back the LCD accordingly the LCD won't display anything, it just lights up. The pins i use for the LCD are belowLCD 4 (RS) to pin 12LCD 5 (R/W) to ground (pin 14)LCD 6 (E) to pin 11LCD DB4, DB5, DB6, DB7 on pins 7, 8, 9, 10
Quotei have bought a new 4X20 LCD screenWhich one??one of those http://www.modtronix.com/images/lcd204a-biw.jpgQuotewhen i put the Ethernet shield on Which one??this http://kll.engineering-news.org/kllfusion01/downloads/ArduinoEthernetShield.jpgDon
I think two unfortunate things have happened, both of which are probably fixable - one for free.Clearly you have a clash of pins when the Ethernet shield is used. Check your code.[font=Verdana] IF[/font] you are using the standard LiquidCrystal.lib, this is just a generic thing, and you have plenty of options for the wiring. You might have something like The circuit: * LCD RS pin to digital pin 12 * LCD Enable pin to digital pin 11 * LCD D4 pin to digital pin 7 * LCD D5 pin to digital pin 8 * LCD D6 pin to digital pin 9 * LCD D7 pin to digital pin 10#include <LiquidCrystal.h>// initialize the library with the numbers of the interface pinsLiquidCrystal lcd(12, 11, 7,8,9,10);If so, you might try wiring D6 to 5 and D7 to 6 and change the command toLiquidCrystal lcd(12, 11, 7, 8, 5, 6); thereby freeing up pins 9 & 10 for the Ethernet.The other unfortunate thing is a bad choice of display. Most 4x20s come with an I2C adapter included. This enables them to be used on the I2C bus, which has nothing to do with Ethernet or SD cards, uses only two wires, and can be shared with an on-board clock.You can get this adapter for about $5 and convert your existing display.
ok i think i know what might be the problem, on the shield it says Mega Comparable .. does that mean it won't work with UNO ?
if the text / characters are on the lcd, but can only just be seen, its the contrast you need to change.
I noticed that the LCD light is kinda dim, it not as bright when i connect it to the Arduino Board without the Ethernet Shield.
suggestion :rugged Arduino,http://ruggedcircuits.com/html/ruggeduino.htmlno I don't represent them, I found them by luck, and have used them ever since for 'experimenting' thoug I do use megas most of the time for proper work. they are just about bullet proof, one other quick thought, if you had smoke, that tends to indicate a gross over current, more like a short , may be between the power rails or to ground.
I bet pin conflict. With an Uno, you cannot use D10-D13 (and D4 if using an SD card) for anything else while using SPI devices. The w5100 and SD are both SPI devices.You should be more specific about the smoke. Which IC was smoking? Was it the 5 volt regulator?
avrdude: stk500_getsync(): not in sync: resp=0x00