newbe keyboard problems
Hi,
Does the keyboard absolutely require 5vdc ?
If so, whats the simplest way to provide 5vdc ? I've read the 5vdc thread, but
what's the simplest way to do it ? I'm new at this stuff.
None of the keyboard lights come on, I've read several threads, I've tryed reversing
clock & data pins, I've double checked my wiring & resistors. I know the Propeller chip is ok as well as my
simple spin code is ok.
It should not be this hard to hookup the keyboard. I've been working all day on it![confused.gif](http://forums.parallax.com/images/smilies/confused.gif)
My VGA monitor works fine on the breadboard, I'm not providing it any additional power.
Please help, I'm lost on what to try, I've never hooked up anything over 3.3vdc to my propeller.
I think I can just use a resistor with 5vdc? what size ?
Thanks,
-Areal
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
I have a tree growing out of my head, but
what do you expect ? I'm a programmer.
Post Edited (Areal Person) : 10/29/2007 7:37:53 PM GMT
Does the keyboard absolutely require 5vdc ?
If so, whats the simplest way to provide 5vdc ? I've read the 5vdc thread, but
what's the simplest way to do it ? I'm new at this stuff.
None of the keyboard lights come on, I've read several threads, I've tryed reversing
clock & data pins, I've double checked my wiring & resistors. I know the Propeller chip is ok as well as my
simple spin code is ok.
It should not be this hard to hookup the keyboard. I've been working all day on it
![confused.gif](http://forums.parallax.com/images/smilies/confused.gif)
My VGA monitor works fine on the breadboard, I'm not providing it any additional power.
Please help, I'm lost on what to try, I've never hooked up anything over 3.3vdc to my propeller.
I think I can just use a resistor with 5vdc? what size ?
Thanks,
-Areal
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
I have a tree growing out of my head, but
what do you expect ? I'm a programmer.
Post Edited (Areal Person) : 10/29/2007 7:37:53 PM GMT
Comments
and should also feed pins 3 and 4 of the keyboard connector.· The two pullups on pins 1 and 5 on the keyboard connector should go to 3.3VDC.
Sid
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Yesterday is history, tomorrow is a mystery, and today is a gift.
That is why they call it the present.
Don't have VGA?
Newzed@aol.com
·
When in doubt, use existing working hardware as a reference. There are schematics for the Propeller Demo Board and the Propeller Protoboard that show how to hook up a PS/2 keyboard connector to a Propeller. These boards work with PS/2 keyboards and mice. If you hook up your PS/2 keyboard the same way, it should work too.
I see, the 5vdc is required, Ha.. Ha... well, it's my own fault, I guess
I got stuck because I've not used 5vdc before, I hope I don't fry it [noparse]:)[/noparse]
Thanks, I'll let you know how it turns out.
-Areal
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
I have a tree growing out of my head, but
what do you expect ? I'm a programmer.
You won't fry anthing if you include the resistors shown on the schematic.
Graham
But can our simple resistor do that trick? Be calm - you also bought it from the store