Quote:
Originally Posted by mora
I was able to program PIC using MBHP and P18. Now this random 16x2 character display isn't using HD44780 controller and whole circuit draws 700mA when powered. Backlight is lit but nothing shows up on the screen. Without screen attached circuit draws something like 30mA. |
Hi Mora,
At 700mA I have to think something was miswired (different pinout for LCD).
An LED backlight draws 60~100mA and LCD controller logic is typically less than 7mA. I'm thinking Vcc and Gnd swapped on J3 or maybe this required a much larger LED ballast resistor for R19? With all control pins being digital inputs, I'm thinking the PIC
should be OK.
Just curious, do you have a datasheet for this LCD?