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Richard Erlacher
01/22/13 09:13
Read: 760 times
Denver, Co
USA


 
#189288 - Yep ... it's probably the backlight supply generator
Responding to: Rustu Kaya's previous message
These things are notoriously noisy, as they generate a high voltage with a primitive generator. You might consider putting a low-value resistor in series with the supply to the generator and bypassing both sides, carefully watching the resulting oscilloscope display. That won't do ALL the work, but probably will enable you to reduce the power to gnd noise to reasonable levels. RFI is another issue. A grounded metal cap might do the trick. A better solution, if other measures don't meet your needs, might be to find a similar LCD with an LED (lower-voltage) backlight.

RE


List of 5 messages in thread
TopicAuthorDate
LCD unit causes interference.      Rustu Kaya      01/21/13 12:26      
   which module      Jan Waclawek      01/21/13 14:31      
      two thoughts      Erik Malund      01/21/13 15:27      
         backlight      Andy Neil      01/22/13 00:37      
   Yep ... it's probably the backlight supply generator      Richard Erlacher      01/22/13 09:13      

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