I have a 5V display.
The pad I soldered is located in the bottom left corner of the DB9 when looking at it.

Two questions in the same topic:
- What is the lifetime of the VK202-25 display?
- Can I send the "Display On" command (254 66) very "often" (~100 times with 100ms between each) with no damage on the display?

Thank you. I did it and it works correctly.
I also soldered an other pad to supply 5V through the DB9 plug. The user manual indicates we can do this but it was not working.

When looking at the PCB board, above the SP232AEN chip, I can see 2x4 solder pads. See picture.
Can I solder the column 2 and 4 and unsolder columns 1 and 3 to bypass the RS232->TTL converter with no danger ?

Dear All,
I'm using a micro-controller (TTL levels) to write on my VFD display.
Is there a way to directly wire the TTL signal to the display without performing a TTL->RS232 conversion before ?

I can see that the DB9 plug on the display is connected to a SP232 chip that performs the RS232->TTL ...