| ??? 03/30/10 09:12 Read: times |
#174619 - more on contrast Responding to: ???'s previous message |
Please confirm voltages on the VEE output and Vo input (should be connected to the taper of the contrast trimmer).
If the display is on (see Display On command), there should be a visible change from "black" to "white" on the display as you turn the contrast trimmer. Unfortunately, it seems that this display goes to OFF after reset (so working program is needed to set the contrast). My finding is, that these displays have a very narrow range of operation voltage (i.e. the trimmer has to be turned very slowly around the "sweet point"). JW |
| Topic | Author | Date |
| nothing displayed on graphical lcd using P89V51rd2. | 01/01/70 00:00 | |
| Try to adjust contrast | 01/01/70 00:00 | |
| About The Bus Twist | 01/01/70 00:00 | |
| Start Extremely Simple | 01/01/70 00:00 | |
| But how will i know that data is getting written to the vari | 01/01/70 00:00 | |
| read it | 01/01/70 00:00 | |
| read it !! | 01/01/70 00:00 | |
| RE: registers that may be read/write | 01/01/70 00:00 | |
| Try the text mode | 01/01/70 00:00 | |
| That could be step 2 | 01/01/70 00:00 | |
| no text mode | 01/01/70 00:00 | |
| more on contrast | 01/01/70 00:00 | |
| signals | 01/01/70 00:00 | |
| Success! | 01/01/70 00:00 | |
| work to do | 01/01/70 00:00 | |
| i agree | 01/01/70 00:00 | |
| one more doubt | 01/01/70 00:00 | |
| an easier alternative | 01/01/70 00:00 | |
| Isn't this a question to the mentor? | 01/01/70 00:00 | |
| Need For A Buffer With GLCD | 01/01/70 00:00 | |
| dot line buffer | 01/01/70 00:00 | |
nothing displayed on graphical lcd using P89V51rd2 | 01/01/70 00:00 | |
| Thanks | 01/01/70 00:00 |