need a device...

  • Thread starter Thread starter B&W
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B&W

B&W

B&W

Soldato
Joined
3 Oct 2003
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7,668
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Birmingham
Hi i need something portable which can transmit numbers onto a led display from a distance of around 15-20 metres. The transmitting device should be something like a keypad also need the ability to quickly resubmit the numbers within 10 or so seconds.

Is there anything commercially available if not wot do u recommend?
 
When you say "led display" do you mean 7 segment LED displays? Do you have this display already or are you looking for that too?

Depending on your skills you could make something like this with two arduinos and some xbee modules.

I don't think you will find something commercially available as it is a pretty odd request.
 
Ok, how many 7 segments?

The basic view of it would be:

One arduino with a numeric keypad and xbee module

and

A second arduino with an xbee module and probably some driver chip to support more 7 segments.

You would obviously need to figure out how to wire up the keypad and the 7 segments (the xbee modules are easy as you can get a interface card (called a shield)).

Then you would need to write some code (depending on your coding skills this could be pretty easy, the aruduino forum is very helpful too) to interpret the keypad presses and transmit them over the serial port, the xbees act as wireless RS232 and once configured require nothing special to get wireless comms working.

On the receiving end you would need to write some code to take the incomming numbers on the serial and output them to the 7 segments. There are some examples of this in the arudino codebase and also again the forum is a good place to get help.

If all that seems a bit daunting then I can't help you any more.
 
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