Hi All,
My limited knowledge is making it hard for me to find a suitable replacement for a pot used to control the backlight of an LCD. The LCD in question is the following:
https://github.com/DFRobot/Wiki/raw/master/DFR0550_Schematics.pdf
I believe R6 is what I'll be replacing (it's one of those dial types). I'm unsure if the voltage (19.2v) needs to be considered as, from what I can tell, most digipots only work with ±5v. Also it's 500r, but most digipots are 10k. The current pot reduces the brightness to about half, ideally I'd like to reduce the brightness completely.
I'd ideally like a non-volatile digipot so I can 'save' the value on shutdown. I've not found anything that matches my requirements based on my limited understanding.
In terms of the interface, 3-wire serial (SPI) would be ideal.
Can anyone recommend a suitable replacement?
Thanks in advance!
My limited knowledge is making it hard for me to find a suitable replacement for a pot used to control the backlight of an LCD. The LCD in question is the following:
https://github.com/DFRobot/Wiki/raw/master/DFR0550_Schematics.pdf
I believe R6 is what I'll be replacing (it's one of those dial types). I'm unsure if the voltage (19.2v) needs to be considered as, from what I can tell, most digipots only work with ±5v. Also it's 500r, but most digipots are 10k. The current pot reduces the brightness to about half, ideally I'd like to reduce the brightness completely.
I'd ideally like a non-volatile digipot so I can 'save' the value on shutdown. I've not found anything that matches my requirements based on my limited understanding.
In terms of the interface, 3-wire serial (SPI) would be ideal.
Can anyone recommend a suitable replacement?
Thanks in advance!