Quote Originally Posted by barkerben
Hi,

There are various threads out there about 3v3 LCD options.
I have a circuit where evrything except for the LCD runs at 3.3v,
so it would be really useful not to need 5v for the display.

Any thoughts?

Ben
Hey Ben,
I had a project with exactly the same issue. The bnattery supply limited me to 3.3, and everything ran fine but the LCD
I used the HPWM output to pop the voltage up to 6 volts or so,and used a tiny regulator to bring it down to 5 volts. It used two diodes and two caps. I believe it would run without the regulator, but as the PS sags, it may create contrast issues. If you have a free HPWM line, this is the EASY way to go. I've got schems and software. The LCD drew just a couple of mils. Just for giggles, I did it also on a PIC without HPWM using interrupts. Timing is a little trickier especially if there are comms going on.

Ron