Electronic Sign Keyboard Connector

[luvhuffer]

My friend found this electronic sign. The ones with red leds that scroll a message across it. On the back is a connector marked keyboard. It looks like a Cat5 connector. Anyone know how that would work or what kind of keyboard/adapter he would use?

 

[cliffordcooley]

I know absolutely nothing about the Electronic Signs. The only thing I can do is share a link I found that may help. You can try Programming Alpha Signs Without a Keyboard which points to AlphaNet for Windows for programming software.