xterm -geometry 80x24 -fn 5x8
xterm -geometry 80x24 -fn 6x9
if you're resourceful and curious, see if you can out where X windows fonts are located, and see if you can convert these to a form usable by your pushbroom.
Example of some of the lab work: Dacko Adrian's fonts:
+ + + + + + + +++++ + + + + + + ++++ + + + + ++++ + + + + + + ++++ +++ + + + + + + + + +++ +++ + + + + + + + + + + + + +++ ++++ + + +++ + + + ++++ ++++ + + +++ + + + + +++ + + + + + +++ + + + ++ ++ + + + + + + + + + +++++ + + + + + + +++ + + + + + + +++ +++ + + + + + + + ++ + + + + + + ++ ++ + + + + + + + + + + + + + ++++ + + ++ ++ + + + + + + + + + + + + + + + + ++ + ++ + + + + + + + + ++ + ++ + + +++ + + + + + + + + + + + + +++ ++++ + + + + + + ++++ + + + +++ + + + + + + + + + + + + + ++ + ++++ + + + + + + ++++ + + + + + + +++ + + + ++++ + + + + +++ +++++ + + + + + + + + + + + + + + + + + + + + + +++ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +++++ + + + + + + +++++ +++ ++ ++ ++ ++ + +++ + +++ + ++ + ++ +++ + ++ + + + + + +++ +++ + + + + + + + + +++++ +++ + + + ++ + + + + +++ + ++ + + + + + + +++++ + + +++++ + + ++++ + + + + +++ ++++ + + ++++ + + + + + + +++ +++++ + + + + + + + +++ + + + + +++ + + + + + + +++ ++++ + + + + + + ++++ + + +
last year, for lab3 and 4, one group did a second decoder at address 241, to get 16 lights total, then connected an alphanumeric 16 segment light.
as a thought exercise:
how many lights (minimum number) would you need to make
a pushbroom capable of generating an 80x24 text display screen?
answer: 192 lights:
(for 192 by 480 pixels)
why?
note that this could be done with 24 groups of 8 lights.