Connect Propeller To 5V systems

aardwark

Hi Guys!

I would like to put a question and need help.

I am planning to connect Propeller to a 4x20 characters LCD module
The type is:EW20400.
BUT: The power for LCD is 5V!
What can I do?

Paul Baker

There is a sticky thread which discusses this topic: http://forums.parallax.com/showthread.php?p=585920

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Paul Baker
Propeller Applications Engineer

Parallax, Inc.

joeld

aardwark

I was wondering if you had the datasheet for the display. I bought the ew20400 from parallax with the 7 pushbuttons but cant find the datasheet anymore.

Thanks

Joel

Peter Jakacki

I found a datasheet at http://www.glyn.de/data/glyn/media/doc/EW20400GLY.pdf

aardwark: Just tie the R/W low and operate in write only mode and you can feed the propeller lines straight into the module. If you talk to the display from Spin then it is quite probable that you may not even need any delays between writes. This is the method that I use in commercial displays so I can certainly vouch for it.

*Peter*