Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - Leo

Pages: [1]
Character LCDs / NHD-C0220BiZ-FSW-FBW-3V3M fails premature
« on: July 29, 2015, 11:59:59 AM »
I am using the NHD-C0220BiZ-FSW-FBW-3V3M and it appears to operate fine initially, then fails after time (from a week to a few months).  On analysis I see that pin 6 or 8 are high impedance as their voltage starts at 3.3 volts, then drops to zero. The rest of the pin inputs are perfect.
I do have the capacitors recommended by the data sheet on these pins.  It appears to occur at 1 installation but other identical installations are fine.  It is used in homes so the temperature is always room temperature, but the humidity may be high in the home with the failures.
The back lighting is only on when someone presses a switch to access the display information.

Pages: [1]