BoFH
Newbie level 1
I'm thinking about building a large LED screen out of 16x16 LED panels. I'm trying to find out if I can do 240x96 LEDs (15x6 panels) reasonably economically. I have sourced the LEDs but am trying to find the driving circuitry without breaking the bank. I'm thinking of using shift registers. I'm thinking of running the LEDs at 20mA on 1/16 duty cycle. I'm therefore looking for a column shift register that can source 20mA per output and 320mA in total. Also something to sink the row at 320mA a pin and 320mA in total. Does a shift register exist that can sink that much or do I need to use a driver IC? Can anyone recommend which chips to use? Would I be better off sinking the rows with power transistors?
I have taken a look at an instructable that used a HEF4794 and a mic2981 but these become somewhat expensive when you need 180 of them, plus something to scan the rows.
Can anyone suggest a good and economical way to do this?
Regards,
BOfH.
I have taken a look at an instructable that used a HEF4794 and a mic2981 but these become somewhat expensive when you need 180 of them, plus something to scan the rows.
Can anyone suggest a good and economical way to do this?
Regards,
BOfH.