Anybody got a Blinky LED Circuit with program

Scott Portocarrero

I am looking for a cool blinky LED circuit for the BS2 that will randomly scroll / blink / flash rows of LEDS. I am going to add this circuit to the SUPERBOE))) per some users request

mctrivia

you can blink leds really easily in hardware using a 555 timer. as for running leds all you need to do is put 5v to the anode, and a resister(R) between the cathode and the pin.

R=(5-V_LED)/.02

if you want to do say an 8x8 grid you would use 8 pins through a resister(R) to run the anode on each row and 8 pins to run the cathode on each column.

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dev/null

To minimize pinouts, consider using a 74HC595 shift register.
With one 595, you can control 8 leds using 3 pins.

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Don't worry. Be happy

PJAllen

http://forums.parallax.com/showthread.php?p=665068


http://forums.parallax.com/showthread.php?p=778772

Scott Portocarrero

Perfect PJ allen thanks