Using buttons instead of a keyboard?

LiqTenExp · Post by **LiqTenExp** » Tue Mar 12, 2002 5:21 pm

Hi,

I am new to LCD's being used with computers to display data. If i had a program like LCDC and wanted to be able to use back forward stop and play, and a power button (5 buttons total) near the display to control it instead of a keypad. I was wondering if that is possible. I was looking to get a 20x4 MO backlit LCD display.

Thanks

Post by **Henry** » Tue Mar 12, 2002 5:55 pm

Yes, as long as the button shorts out two lines it's all good.

LiqTenExp · Post by **LiqTenExp** » Tue Mar 12, 2002 10:38 pm

What do you mean by shorting out two lines? Two connections on the keypad connection? For example the 20x4 LCD from MO?

Whoosh · Post by **Whoosh** » Wed Mar 13, 2002 1:47 am

Hi there,

Check the manual for the display. It's pretty well documented. The keypad connector is setup as a matrix with rows and columns.

So, what you want to do is connect a row and a column pin with a momentary-style button which connects the 2 when it's pressed.

Cheers, Whoosh

Atarien · Post by **Atarien** » Wed Mar 13, 2002 9:04 am

this what i did in my project :
http://www.jackypc.com/articles/146/global.jpg

the online documenation has been very useful

babber · Post by **babber** » Wed Mar 13, 2002 11:42 am

I have made an external remote which uses 8 switches. I have a simple diagram that explain how to connect switches in rows and columns. See http://mysite.freeserve.com/winamp_remote/switch.htm

Cheers

Babber

ijoat · Post by **ijoat** » Sat May 18, 2002 2:06 pm

babber: THANK YOU so much for the link to your website explaining the button wire diagram. I'm new to LCDs and have been racking my brain trying to understand the buttons actually work. I've seen several desciptions and diagrams but none of them made sense until I looked at yours. I feel like a "born again". :-)

Thanks dude!