I'm moving my first steps with ad Arduino UNO, please be patient...
I would like to drive a 8 digits 7 segment display (8 segment to be precise as THere's also the dot).
I've read a couple of things about the 74HC595 wich seemed to be used on the little shield I get from Internet (8 x Seven-Segment Displays Module for (For Arduino) (595 Driver) 411869 2022 – $8.10) and it seemed complex but not so crazy.
At the first try I get unexpeted and random results.
I was thinking I had to drive a 64 positions register each one related to each segment but... now it's clear that's not the game I have to play.
In addition, taking a look at the two 4 digit display I can see that each has just 12 pins under each block of segment (24 in total) so there should be some kind of multiplexing I have to deal with to light the segment I cannot figure out.
-- Do anyone has already worked with this shield? (I cannot find out any tech document)
-- Do you know how many bits I have to deal with while eriting to the register before sending HIGH to the RCLK pin?
-- Is there any documentation around I can use to understand how to send data to the register as lo light the segment I want lo light?
Thanks to all.
(Please, simple english as mine is a disaster :-(( )