Rowan Posted August 17, 2003 Posted August 17, 2003 HiSomething 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
Steven_C Posted August 17, 2003 Posted August 17, 2003 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.
Rowan Posted August 18, 2003 Author Posted August 18, 2003 Hi SteveI'm using the MB64 PCB, so that explains why this is happening. Rowan
TK. Posted August 20, 2003 Posted August 20, 2003 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.pdfBest Regards, Thorsten.
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