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Coordinate Display?

Started by The14thDr, Jun 16, 2014, 03:58 pm

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The14thDr

Hello. As some of you may already know, I am working on rebuilding my TARDIS console, but this time with a lot more electrical components. One of these components will be a coordinate display system. (If you've seen 13drwho's build diary, you'll know that me and Dino had a rather lengthy discussion about using binary encoders and what-not).

My idea is to have a computer keyboard connected to an LCD character display via USB. However, I'm not sure how to achieve this and was wondering if any of those tech-savvy amongst you could help me out. (Bearing in mind it would have to be quite cheap, as I only have £15 in my budget).

Thanks for reading. :) Any help would be gladly appreciated.
"Would you like a jelly baby?"

davidnagel

Nice idea.

I think you'd need a middle man in there somewhere, a controller that knows how to tell the screen to interpret your keyboard input. Say like a Raspberry Pi, but if thats the case you could just connect a small HD monitor in there and have a flash component receive the input.

Just googling 'lcd character display usb' brought up this page: http://hackaday.com/2012/10/23/driving-an-lcd-character-display-using-custom-hid-codes/ that gives you an idea of where to go with what you're after - may need a bit more than £15 though!

Unless of course you have the USB interface controller, which can be found on this page: http://www.noritake-itron.com/subpages/frontpagese/newspage.htm say purchased from eBay: http://www.ebay.co.uk/itm/20x4-LCD-Display-Module-With-I2C-Serial-and-Keypad-Controller-/110893433937?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item19d1c38451

Good luck!
Kind Regards,

David

www.spiffinglyniceguy.co.uk

The14thDr

Thanks. I may increase my budget if there's no other option, but at the moment I'm just collecting ideas and deciding which way will work best.
"Would you like a jelly baby?"

The14thDr

Jun 16, 2014, 04:41 pm #3 Last Edit: Jun 16, 2014, 04:42 pm by The14thDr
I've been searching all over Google and I found a site that gave a slight outline to the project I'm trying to achieve, but he didn't go into much detail. So I was wondering if this would shed any light onto the situation:

If I connected a matrix keypad with an LCD text display, it would display the numbers that I enter into the keypad. However, I don't know how to do this.

p.s. here's the keypad in question: http://www.ebay.co.uk/itm/like/330925209095?limghlpsr=true&hlpv=2&ops=true&viphx=1&hlpht=true&lpid=108&device=m&adtype=pla&crdt=0&ff3=1&ff11=ICEP3.0.0&ff12=67&ff13=80&ff14=108
And here's the LCD display:
http://www.ebay.co.uk/itm/281346022679?cmd=VIDESC&gxo=true

(And the great thing is, all those parts will cost me less than a fiver!)

I originally wanted a keyboard, but a keypad would work just as well. Besides, in the classic-era, coordinated were often given as numbers anyway.
"Would you like a jelly baby?"

davidnagel

Kind Regards,

David

www.spiffinglyniceguy.co.uk

The14thDr

Thanks! Instructables has exactly what I need! And it works with a keyboard!  :D

The keyboard is a PS2 keyboard, and I could probably pick one up for about £4 on eBay. And then there's the LCD display, and I've found one of those on eBay (£3). And then there's all the extra parts (adapters, etc.) which will only cost me a couple of pounds, if I know where to look.

Excellent! An LCD coordinate display for £10! Brilliant! :)
"Would you like a jelly baby?"