| ??? 04/14/08 04:51 Read: times |
#153228 - Are 3.3V Character LCD Modules Available? |
I have been looking around and seem a bit miffed that there just do not seem to be 3.3V powered character mode LCD modules around. Almost all the modules I've looked at (dozens so far) seem to be rated at 5.0 volts +/-0.25 volts. So I have some questions for the community here...
0) Does anyone have information on availability of 3.3V powered character LCD modules? 1) Has anybody run a module rated at 5V on 3.3V and seen it work? ...reliably? 2) What is the normal method used to interface 5V modules to a 3.3V MCU? 3) I have observed that the 5V modules have "TTL" compatible input levels. It seems one could use a 3.3V MCU with "CMOS" outputs to drive the signal pins to the correct range of voltages. This necessitates providing a 5V supply for the module. Would signal buffering through a translator IC be recommended? 4) Most of the graphics LCD modules I have looked at work at 3.3V supplies. I would consider that type except that the MCU does not begin to come close to RAM/FLASH needed to properly support a graphics LCD module. Michael Karas |
| Topic | Author | Date |
| Are 3.3V Character LCD Modules Available? | 01/01/70 00:00 | |
| graphic LCD | 01/01/70 00:00 | |
| Just a few tips | 01/01/70 00:00 | |
| 5v for contrast | 01/01/70 00:00 | |
| i'm using 5V LCD and... | 01/01/70 00:00 | |
| works - kind of | 01/01/70 00:00 | |
| here is one such dealer | 01/01/70 00:00 | |
| We have | 01/01/70 00:00 | |
| Thanks Grant | 01/01/70 00:00 | |
Forgot to look at work | 01/01/70 00:00 | |
| datasheet | 01/01/70 00:00 |