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by nervlinux
Tue Dec 25, 2012 11:09 pm
Forum: Other projects
Topic: 16x2 no contrast help (solved)
Replies: 22
Views: 7260

Re: 16x2 no contrast help

thats why its not working, my raspberry pi is a rev1. so i just change 27 back to 21 and it works :lol:

thanks guys for help!!! :D :D :D

Image
by nervlinux
Tue Dec 25, 2012 8:08 pm
Forum: Other projects
Topic: 16x2 no contrast help (solved)
Replies: 22
Views: 7260

Re: 16x2 no contrast help

I did what g4eml said and it work. :D Now i see the white blocks and my potentiometer is working. Now for code, when i try to run the code (sudo ./Adafruit_CharLCD.py) I get this ./Adafruit_CharLCD.py:68: RuntimeWarning: This channel is already in use, continuing anyway. Use GPIO.setwarnings(False) ...
by nervlinux
Tue Dec 25, 2012 7:39 pm
Forum: Other projects
Topic: 16x2 no contrast help (solved)
Replies: 22
Views: 7260

Re: 16x2 no contrast help

It's lights up, but i don't see any white blocks. When i check pin 15,16 i get 4.53v. But for Vss and Vdd nothing, just 0. I don't have a 1W potentiometer or any resistor.

For power supply, i'm using blackberry playbook charger.
by nervlinux
Mon Dec 24, 2012 7:41 pm
Forum: Other projects
Topic: 16x2 no contrast help (solved)
Replies: 22
Views: 7260

16x2 no contrast help (solved)

i can't get my potentiometer to work. all i see is a blue screen and then when i try to turn it nothing happens. heres a picture http://i46.tinypic.com/2z5oz92.jpg does that look right? i'm using adafruit tutorial ( i never use a breadboard before and never solder , so im a noob at this stuff :D )

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