build 3.3V PMOD LCD adapter with TL7660 contrast fiddler

SamWibatt / FPGA_HD44780

Simple, write-only character LCD core (in progress)

GNU General Public License v3.0

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build 3.3V PMOD LCD adapter with TL7660 contrast fiddler #39

Open SamWibatt opened 4 years ago

SamWibatt commented 4 years ago

Find one of my 4x20s with a backlight and add a transistor-switched backlight pin. Would it be possible to use the 3.3V as its voltage and the negative contrast voltage as its ground? Could run lower current that way, plus I don't know what transistor to use to switch 3.3V signals.