|Re: HP's Latest Calc|
Message #10 Posted by Christof on 1 Feb 2003, 5:11 a.m.,
in response to message #8 by Paul Guertin
Easy enough, I think. since kids are into the lights, grab a pile of suprlus 7 segment LED bricks, pop 48 of them into a largish housing, and grab the keypad part from the nice laptop 10key addons. (I think you can get 17 key ones with a serial interface really cheap, I have a couple of parallel interface ones)
make the top left (usually numlock or something) into a shift key so you can have RDN, RUP, X<>Y, and maybe some registers?
As long as the power suppky isn't too complex, it should be doable as a level 2 kit if you have included a preprogramed ROM, or a really nice kit to mess with if you used a flash ROM and had some simple ethod of flashing from PC.
IT wouldn't be a cheap kit, even if you backed down to really cheap 10 digit 7segment LCD displays stacked up. But I think it would work.