I was reading this post and remembered I had a bunch of 3 digit displays I wanted to use. I was wondering if it's a sane idea to use one 595 per 3digit display in arrays of 2 (so 2 chained 595s controlling 6digits split between 2 3digit displays...shit that's a mouthful).
I mean I could get MAX7219s instead but I have these 595s lying around just begging to be used. Here is the 74HC595D date sheet http://www.componentschip.com/detail.../74HC595D.html
I got another tiny problem though. No datasheets for the displays so no idea how much v or A they'll need. I could always get those high current 595s instead of 7219s but that might be a bit dumb no? I mean I've seen people drive ridiculous amounts of leds with 595s, I think either the specs on that chip are way off or theres a lot of vdroop on the pins. Really how much current can those displays need anyway? They are red leds I think.
ED: Have to say that I wasn't just "reading" that topic. Credit to /u/tyggerjai for replying to me and giving me helpful advice, thanks man!
I mean I could get MAX7219s instead but I have these 595s lying around just begging to be used. Here is the 74HC595D date sheet http://www.componentschip.com/detail.../74HC595D.html
I got another tiny problem though. No datasheets for the displays so no idea how much v or A they'll need. I could always get those high current 595s instead of 7219s but that might be a bit dumb no? I mean I've seen people drive ridiculous amounts of leds with 595s, I think either the specs on that chip are way off or theres a lot of vdroop on the pins. Really how much current can those displays need anyway? They are red leds I think.
ED: Have to say that I wasn't just "reading" that topic. Credit to /u/tyggerjai for replying to me and giving me helpful advice, thanks man!