Pages: [1]   Go Down
Author Topic: Wire length for parallel LCD?  (Read 873 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Newbie
*
Karma: 0
Posts: 2
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I have a 16x2 LCD that is working perfectly on a bread board- just using the parallel interface(http://tronixstuff.wordpress.com/2011/01/08/tutorial-arduino-and-monochrome-lcds/), however when I have tried to transfer it to cables instead of the breadboard the text becomes garbled.

Have tried numerous things to fix this but am at a bit of a loss. I reset the arduino each time i reconnect it- same as on BB. The cables I am using have a connection when measured with a multimeter. Wondering if there is a limit on length or gauge, type of wire from the arduino to the LCD? or maybe something else that i am missing?

few details:
wires are 30 cm long
crimped terminals
stranded hookup wire
seems to only effect the digital pins and the enable. power and GND work fine.

« Last Edit: February 22, 2011, 09:40:49 am by acitizen » Logged

Central MN, USA
Offline Offline
Tesla Member
***
Karma: 73
Posts: 7197
Phi_prompt, phi_interfaces, phi-2 shields, phi-panels
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

I've used old IDE hard drive cables for that purpose, maybe around 15cm in length. Your cable is not ribbon but bunched up and wrapped together in a plastic shield, right?

Take a 1uF capacitor, stick it between 5V and GND on your LCD, see if it solves the problem.
Logged


Offline Offline
Newbie
*
Karma: 0
Posts: 2
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

cheers. I will try that and let you know how it goes.
Logged

Pages: [1]   Go Up
Jump to: