| ??? 01/21/13 21:31 Read: times |
#189282 - which module Responding to: ???'s previous message |
What module in particular? Can you post a datasheet? Or even better, pictures?
Is the power supply properly decoupled? Does a capacitor (100nF ceramic, for example, placed directly at the module's pins), or perhaps some series choke on the power supply, make any difference to the interference? Is there a backlight? What kind? Couldn't that be the culprit? What about the VLCD source, is this a 5V display with VLCD driven simply from a potentiometer, or is this a 3V display where VLCD might be driven from a charge pump? The controller's oscillator is controlled by a single resistor, have a look at the datasheet. You could replace it for a trimmer (temporarily) and try to "tune" its frequency somewhat. Does it make any difference to the interference/noise? JW |
| Topic | Author | Date |
| LCD unit causes interference. | 01/01/70 00:00 | |
| which module | 01/01/70 00:00 | |
| two thoughts | 01/01/70 00:00 | |
| backlight | 01/01/70 00:00 | |
Yep ... it's probably the backlight supply generator | 01/01/70 00:00 |