control multiple leds through one bus

[chubbspet]

Hi there guys, my first post here!

I just wanted to know, when I need to control a large amount of leds independently (+/- 150), is it at all possible to have them all grounded to one wire and then have a second data wire for independent control. Surely there must be an alternative to sunning a separate wire to each individual led? Hope this is making sense!

Thanks in advanced.

 

[papunblg]

It appears that you want to know about LED Matrix. Search edaboard , you will find

 

[FvM]

How about power supply in your "one" (respectively two) wire bus?

 

[papunblg]

FvM is right, Special consideration is required for Power supply.(for LED voltage drop)

For idea https://www.edaboard.com/threads/231528/#post987621

 

[chubbspet]

It appears that you want to know about LED Matrix. Search edaboard , you will find

thanks, seems like this is what I need, yes

 

[milesguidon]

That image shows 64 LEDs addressed using 16 pins. You can multiplex them to achieve more individually addressable LEDs per number of pins. You need to use a microcontroller or something with programmable tri-state pins. The maximum number of LEDs for n tri-state pins is [(n!)/(n-2)!]. The code is more complicated, but with 16 pins you can control 16*15 = 240 LEDs independently.