Feb 20, 2010 #1 D drbizzarow Advanced Member level 1 Joined May 24, 2006 Messages 414 Helped 25 Reputation 50 Reaction score 15 Trophy points 1,298 Activity points 3,662 question regarding peggy please reffer following site: **broken link removed** http://www.youtube.com/watch?v=rzfG5oioG-k as you can see this board based on 25X25 LED matrix. And AVR as processor gray level shades are also implemented in his programming. MY QUESTION IS: generally i saw led matrix of 8 rows and several coloums how is it posible to scan 25X25 led matrix in peggy board?? regards[/url]
question regarding peggy please reffer following site: **broken link removed** http://www.youtube.com/watch?v=rzfG5oioG-k as you can see this board based on 25X25 LED matrix. And AVR as processor gray level shades are also implemented in his programming. MY QUESTION IS: generally i saw led matrix of 8 rows and several coloums how is it posible to scan 25X25 led matrix in peggy board?? regards[/url]
Feb 22, 2010 #2 blueroomelectronics Advanced Member level 5 Joined Sep 17, 2006 Messages 1,681 Helped 180 Reputation 358 Reaction score 77 Trophy points 1,328 Location Toronto, Canada Activity points 8,696 question regarding peggy Well it's got a 1:25 duty cycle and IMO the 74HC154 is a weak column driver so I'm not sure how bright it would be. You'll need really bright LEDs to make it worthwhile.
question regarding peggy Well it's got a 1:25 duty cycle and IMO the 74HC154 is a weak column driver so I'm not sure how bright it would be. You'll need really bright LEDs to make it worthwhile.
Feb 22, 2010 #3 D drbizzarow Advanced Member level 1 Joined May 24, 2006 Messages 414 Helped 25 Reputation 50 Reaction score 15 Trophy points 1,298 Activity points 3,662 question regarding peggy thx blueroomelectronics for the reply ...... did you saw the second link i have sahred ??? you can see the video peggy working
question regarding peggy thx blueroomelectronics for the reply ...... did you saw the second link i have sahred ??? you can see the video peggy working