Author Topic: (SOLVED) Strange Behaviour of Display  (Read 2432 times)


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(SOLVED) Strange Behaviour of Display
« on: May 07, 2018, 04:34:20 PM »
--- Missing OLED Resistor!

Hi there,

Finally the preenFm arrived today and I managed to finish building it up in a couple of hours. And when i power up the preenFM with usb connected to my computer... I get a strange behaviour with the display. It's bright at the start but when I click buttons or turn the encoders, the brightness of the display changes from bright to dim in a step like manner. After a few times, it goes back to bright.

I thought it was because i left out the 68ohm resistor besides the 10k resistor, took it apart and solder it on with a 22ohm resistor as I think I have the OLED version, NHD-0420DZW-AY5. But it doesn't change any thing. The display still dims.

Any ideas?

..Still haven't tested audio or midi in....

« Last Edit: May 08, 2018, 02:23:54 AM by dzenat »