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: 1514

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

Yoey Thamas posted a blog post

Make your Kitchen a Smarter Place to Work in

The first and foremost thing that you should always keep in mind is that give priority to the…See More
14 hours ago
gaurav rana is now a member of GarageLab (arduino, electronics, robotics, hacking)
14 hours ago
Jim Kelley joined Marcelo Rodrigues's group
Thumbnail

Arduino

Group for the Arduino communitySee More
yesterday
Jim Kelley posted a discussion

Help with selecting sensors

I am new to Arduino but am a quick study and can get up to speed fast. I can see some tremendous…See More
yesterday
GarageLab posted a blog post

These 3D-Printed Ants Could Be The Factory Workers Of The Future

These 3D-printed ants scuttle around much like the real thing. But loaded with sensors and wireless…See More
yesterday
Profile IconAdele Smurthwaite, Neil Cheng, John Hardie and 1 more joined GarageLab (arduino, electronics, robotics, hacking)
yesterday
GarageLab posted blog posts
Friday
Profile IconOleg and Scott Runner joined GarageLab (arduino, electronics, robotics, hacking)
Thursday
GarageLab left a comment for RMullen
"Hi RMullen! I'd like to let you know that FRANK KWABENA is no longer a member of…"
Mar 25
daniel gabriel updated their profile
Mar 25
daniel gabriel left a comment for daniel gabriel
"Good Day Mr. Wabena, i dont see any interesting on my profile but i really appreciated that you…"
Mar 25
RMullen replied to Lauren Elizabeth's discussion Scammed...?
"Yes there is another one sending out the same message now.  This is the message I got: FRANK…"
Mar 25
Rick Lin is now a member of GarageLab (arduino, electronics, robotics, hacking)
Mar 25
GarageLab posted a blog post
Mar 24
Profile IconCalvin M and harsha joined GarageLab (arduino, electronics, robotics, hacking)
Mar 24
GarageLab posted a blog post

These Colorful Liquid Droplets Chase Each Other Like Living Organisms

Scientists at Stanford University were at first perplexed by the strange behavior they observed…See More
Mar 23
GarageLab posted blog posts
Mar 20
Profile IconJody Bowie, Kevin Kvarda, Tony Stoklosa and 2 more joined GarageLab (arduino, electronics, robotics, hacking)
Mar 19
Sergey commented on GarageLab's blog post Tutorial: How to use the Monster Moto Shield
"Good day. Can you help me? I took this sketch, but it doesn't working( "
Mar 19
Profile IconDonald Soji Adedokun, Ankur Deo and Hannu Miettinen joined GarageLab (arduino, electronics, robotics, hacking)
Mar 18

© 2015   Created by Marcelo Rodrigues.

Badges  |  Report an Issue  |  Terms of Service