i just bought a arduino leonardo,i just tried to run hello word sketch on it but i was not able to see any thing on the lcd. all connection was done properly .

pin used on arduino- 12,11,5,4,3,2

lcd- winstar

pls help if anyone has any idea.

Views: 2171

Reply to This

Replies to This Discussion

i am also have the same trouble...

Have you got your contrast pot hooked up?  If it's hooked up correctly, you should see an effect when you turn it even if nothing is displayed.  If that's working, try resetting the Arduino a time or two.  If it still doesn't work, I'd suggest redoing rather than just checking your wiring.  Make sure you hook up all the grounds, and make sure they have a good connection. Also, it wouldn't hurt to post a picture, schematic, or listing of your pin connections (for example, are you sure pin 11 on the Arduino is hooked to the enable pin on your LCD?).

i tried what u suggest but i did not work , so i uploaded the image. if u find any mistake in wiring pls make me know.

 

Well, it looks like all of the pins go to the right places.  Does the screen light up when you power it on?  Do you see one line blacked out and the other not?  What happens when you sweep the pot from one extreme to the other?  Sometimes on my breadboard I have to wiggle the wires some to get a good connection, especially the grounds.

only the back light LED glow.there is no other change in display when i sweep the port.

I just tried my LCD to see what happens.  If the LCD and backlight are powered, the contrast pot doesn't do anything and the display is just blank (exactly what yours is doing).  I suppose that means that the Arduino isn't communicating with it properly.  Can you post your setup code?  Maybe try wiring it to different pins just to see what happens (it could be that, say, the ENABLE and RS are swapped).  Are the pins marked on the LCD board?

Please consider this:
http://www.johngineer.com/blog/?p=1224

[quote]For example, the lower 8 digital pins are no longer all a single port, and many of the pins, with the exception of the RX and TX lines, are moved around. Some of the PWM lines are in the same place, but are now connected to different ports and OC registers than they were before.[/quote]

which means many of the libraries will probably have to be rewritten.

RSS

Latest Activity

iftekhar Mobin is now a member of GarageLab (arduino, electronics, robotics, hacking)
yesterday
Profile IconLeicester Hibbert and Michael Young joined GarageLab (arduino, electronics, robotics, hacking)
Jan 9
Profile IconThorsten Schwarz and Dana Custer joined GarageLab (arduino, electronics, robotics, hacking)
Jan 2
Aqeel munir updated their profile
Dec 31, 2016
Todd Enger updated their profile
Dec 29, 2016
FRANK KWABENA is now a member of GarageLab (arduino, electronics, robotics, hacking)
Dec 28, 2016
Ayhan Chaplan commented on GarageLab's blog post How to use a Peltier with Arduino
"Hi! Will this setup work with a 3,8V / 2,5A Peltier element? Or do I have to reduce the resistance…"
Dec 26, 2016
Profile IconAyhan Chaplan, Erva and Donna Carter joined GarageLab (arduino, electronics, robotics, hacking)
Dec 26, 2016
Galy Huang posted a discussion

Ubuntu on Firefly-RK3399

Firefly-RK3399 with dual-core Cortex-A72 and quad-core Cortex-A53, ARM® Mali-T860 MP4 quad-core…See More
Dec 20, 2016
Chase Rangel posted a discussion

What is the simplest way to control one brushless motor forward/reverse?

  Hello everyone I don't know much about this type of stuff had only a handful of RC cars.I've been…See More
Dec 12, 2016
Profile IconErving Howe, Chase Rangel, Werner Pretorius and 1 more joined GarageLab (arduino, electronics, robotics, hacking)
Dec 12, 2016
Frank Turner is now a member of GarageLab (arduino, electronics, robotics, hacking)
Dec 9, 2016
Marcelo Rodrigues and swapnil are now friends
Dec 6, 2016
Marcelo Rodrigues replied to swapnil's discussion Tiny 85 based Thermometer
"Dear Swapnil, Since you don't have any experience with programming you should consider start…"
Dec 5, 2016
swapnil posted a discussion

Tiny 85 based Thermometer

Hi, can any one guide me how to make the tiny 85 based Thermometer which will glow the LED…See More
Dec 4, 2016
Spyros Svoronos is now a member of GarageLab (arduino, electronics, robotics, hacking)
Dec 4, 2016
K Biju is now a member of GarageLab (arduino, electronics, robotics, hacking)
Nov 29, 2016
Profile Iconswapnil and Yasser joined GarageLab (arduino, electronics, robotics, hacking)
Nov 28, 2016
udit is now a member of GarageLab (arduino, electronics, robotics, hacking)
Nov 25, 2016
Aqeel munir is now a member of GarageLab (arduino, electronics, robotics, hacking)
Nov 23, 2016

© 2017   Created by Marcelo Rodrigues.   Powered by

Badges  |  Report an Issue  |  Terms of Service