Hey guys, I want to ask about the voltage problem of LCD HG320240S

pcf2000

Hey guys, I want to ask about the voltage problem of LCD HG320240S [Copy link]

I have a HG320240S LCD screen. After looking at the information, it seems that the power supply voltage is 5V (the information says 0~6.5V). Now I want to use the STM32 MCU to drive it. There is a level compatibility issue. Can it be driven directly? If not, how to solve it?

Can HG320240S provide 3.3V power supply, or is there anything that can be modified on the board to be compatible with 3.3V level?

tagetage

Can it be driven directly? - Yes

Can HG320240S provide 3.3V power? ----- No, only 5V is available.

The specific method of use is,

Refer to the following post. Do not use MCU to read LCD.

https://en.eeworld.com/bbs/thread-1162945-1-1.html

pcf2000

tagetage posted on 2023-2-21 15:56 Can it be driven directly? ----- Can HG320240S provide 3.3V power? ----- No, only 5V can be used. Specific usage...

Thanks, I'll learn from it

wangerxian

It depends on the voltage version of your HG320240S. If it is 5V, a 3.3V microcontroller may be able to drive it, but it may not be able to drive it. You can add a triode or MOS tube as an intermediate driving bridge.

wangerxian

You can use the 51 microcontroller to drive it, so there will be no problem of level incompatibility.