HiSupport for LC7981 has been added to U8glib long time back. I recently add access to another LC7981. Surprisingly nothing was visible. After closer investigation, i noticed, that the contrast setting is wrong in the setup code for the LC7981. Actually the contrast setting was fine for the first display, but the one i recently got required very different values.Please have a very carefull look to your display while using u8glib. It might be working, but the contrast might be wrong. Look from all different angles and with proper light. Maybe you can see something.Oliver
HiActually my second display had two problems: The internally generated voltage was too less and the bias setting in the init code was not correct for the second display. Which voltage do you have for the trimmer? It must be around -15 Volt (or even higher). How is this voltage generated?OliverEdit: Without any uC attached, you should be able to turn all pixel on and off just by moving the wiper of the trimmer from one end to the other.
Well, looks like you have some contrast at least. What is the output voltage of pin 18 with respect to GND?Could this be the missing -15V?Oliver
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16