4x4 LED array
Posted: Mon Mar 21, 2011 4:16 pm
It's a 4 by 4 array of LEDs!
The LEDs are controlled by the LED chip, which takes an Row input and Y coordinate and activates the corresponding LEDs.
The Y coordinate and Row input are pre-programmed with the ROM chips. The ROM for rows is the top one, the ROM for Y is the bottom one.
The part with the RAM, my 4-bit adder, and a clock signal at the bottom is a counter which goes from 0-15 and loops back to 0, and it cycles through the ROM addresses.
Looks best when running at a frequency of 10.
UPDATED:
Replaced the X input with a Row input which specifies the entire row (4-bit unit), and the Y input specifies where to place the row.
Credit goes to my friend Nick for developing the counter.
The LEDs are controlled by the LED chip, which takes an Row input and Y coordinate and activates the corresponding LEDs.
The Y coordinate and Row input are pre-programmed with the ROM chips. The ROM for rows is the top one, the ROM for Y is the bottom one.
The part with the RAM, my 4-bit adder, and a clock signal at the bottom is a counter which goes from 0-15 and loops back to 0, and it cycles through the ROM addresses.
Looks best when running at a frequency of 10.
UPDATED:
Replaced the X input with a Row input which specifies the entire row (4-bit unit), and the Y input specifies where to place the row.
Credit goes to my friend Nick for developing the counter.
