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Topics - ElfShotTheFood

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OLEDs / NHD-0240CW-AR3 runs very hot with 5V supply
« on: March 16, 2015, 11:05:42 PM »
I have a new NHD-0240CW-AR3.  I soldered header pins in place, and using my breadboard I grounded pin 1 and applied 5V to pin 3.  I wanted to see what kind of current draw the display has, and since I'll be using SPI mode, I grounded pins 4-6, 10-14, and 17-19.  All remaining pins were left unconnected for the experiment.  Within 10 or 15 seconds I noticed that the right end of the display (with the flex-circuit cable) was hot to the touch. 

I checked the current draw and it measured 180mA (with no other activity).  This seemed high to me, so I left pin 1 grounded, disconnected pin 3, and applied 2.8V to pin 2.  This time, I measured < 10mA (smaller than the measurement capability of the power supply).

I haven't yet tried actually interfacing to the display; I want to make sure it isn't damaged or defective before proceeding.

Thanks for any ideas on this!

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