led matrix pic 16f84 and 4017 help me please

[mackrackit]

I do not understand you question.

Do the LEDs light up as expected if PORTB.0 is made high?

[Mus.me]

I do not understand you question.

Do the LEDs light up as expected if PORTB.0 is made high?

i made led matrix 5 x 9 well im pluging the side which has 5 and the side which has 9 in 4017 decade counter ic and led matrix 5x9 which is 45 leds.and i did 5 cathodes and the 9 anoides, the ic 4017 it need pulsout i conected it to portb.0 the problem i have is i want to send 1 pulse to 4017 during porta feeding the 1st 5 cathodes leds then 2nd 5 leds 2nd pulse to 4017 so on ...bcz led matrix it has 9 lines of 5 leds so i can display scroling txt or anythings,i hope u inderstand and i will try t0 draw a schema ,,

[Mus.me]

This is the schematic,i need help how to drive this ti write scroling text ,thank u

[mackrackit]

I do not think the pulsout command is going to work for you, maybe a series of them?

This may help you.
http://delabs-circuits.com/cirdir/th.../doc00020.html

[Archangel]

Hello Mus.me,
Here is basically what you do, get some graph paper, lay out 5x9 squares on the paper, and create the characters you want to display. The sides will have a binary value. I use the Port side (the PIC side) as the port output value. I use 8x8 displays as it is easier. the character " 0 " would be comprised of a row value $7e, followed by 3 rows of $81 and finally $7e again. Make up 5 lookup tables which execute sequentally and put the 5 bytes of each character in each. That's how to do it.

[Darrel Taylor]

If that's a CD4017, then it can only source about 0.36 ma @ 5V. That's not enough to drive 1 LED, let alone 5.

If it's a 74HC4017, then it can drive 25 ma. Good enough for 1, maybe 2 LED's, or 5 DIM ones.

Some transistors or darlingtons would help.
You might want some resistors in series with the 5 cathodes too.
<br>

[Mus.me]

If that's a CD4017, then it can only source about 0.36 ma @ 5V. That's not enough to drive 1 LED, let alone 5.

If it's a 74HC4017, then it can drive 25 ma. Good enough for 1, maybe 2 LED's, or 5 DIM ones.

Some transistors or darlingtons would help.
You might want some resistors in series with the 5 cathodes too.
<br>

thank u for reply i know that ,but i wanted to know how i write the pulse to 4017 ,i will change the schematic and i take off tc4017 and i use 8x5 led matrix it will be easy to drive anyway thank you Darrel Taylor & joe S & Mackrackit for helping me .