Hi
Something strange is going on with My MB.
When I’m using a 16F with MB64 firmware the backlight on the LCD works, but when I use an 18F with MIOS and any application the backlight doesn’t work (the MB works fine with either PIC, just no backlight when i’m using the 18F).
Has anyone else had this problem?
Rowan
which pcb are you using? One of the MB64 releases used a PCM method for dimming the backlight, but it caused jitter problems, and it was scrapped.
Hi Steve
I’m using the MB64 PCB, so that explains why this is happening.
Rowan
Yes, exactly! You have to connect the base of the transistor via a 1k resistor and a 10k pot to +5V in order to get the backlight working: http://www.ucapps.de/mbhp/mbhp_core.pdf
Best Regards, Thorsten.