Is there a way using the TFT library to turn off the backlight on a 1.8" ST7735 based display ?
Please post a link to the actual display that you have bought. e.g. Ebay sale page.
It's an Itead ITDB02-1.8SP
Go on. You bought it. You will have a link.
Readers will be happy to click on a link. And answer your question accurately.
It is less likely that they will want to trawl the internet on your behalf.
David.
as you insist...
Looking at the wiki page you can download the schematic it is not possible to turn off the backlight.
There are many other ST7735 displays which can switch the backlight.
But these tend to require 3.3V logic.
David.
Thanks
3.3V logic is not a problem, I'm using a Nano33.
So I can get another display or use a pin and a darlington to switch off the dispplay when not needed...
All the Red boards like this 128x160 SPI have a separate LED pin.
You need a transistor or MOSFET to switch the 20mA-50mA backlight.
Some of these boards have the transistor as well as a regulator on the pcb.
David.
As I have plenty of unused pins, I'm using 4 in parallel to send power to the TFT.
Not really backlight control, but board on/off. However, for my purpose it works fine.