can we drive max7219 and 74hc595 from one mega328?

Forum 2005-2010 (read only) Hardware Interfacing
1

halllo

i am just trying to make an digital cluster this time
and i want to know if it is posible to drive those two chips from one arduino board

all of my pins are free

thanks a lot

2

The 74hc595 needs 3 pins... I don't know what the max7219 is, but I don't think that it would need more than the remaining 9 pins...

3

The 7219 has an SPI-style interface that uses four pins so you can use both.

4

yes but i cant

not sure wich pins i have to use

i have max7219 on 10 11 12 as the example and then

74hc595 does not work on 7 8 9 or 2 3 4

maybe we have to do somethink with the timers?

thanks a lot

5

yes but i cant

not sure wich pins i have to use

i have max7219 on 10 11 12 as the example and then

74hc595 does not work on 7 8 9 or 2 3 4

maybe we have to do somethink with the timers?

thanks a lot

We might be able to help, but only if you post your code and possibly a wiring drawing. There is no reason that the Arduino couldn't handle these two chips.

Lefty

6

just forgot to declare the output pins on the void setup

thanks a lot