Hey, help... please... :)
I'm working on a project and need to drive 8 LED's with PWM with as little wires as possible. (preferably on 3,3V)
Multiplexing I would rather not use this method as it uses a high amount of pins, decreases the brightness of the LED's and when the arduino's loop is not running will not be able to light all LED's. (also no PWM)
MAX7219 This one seemed like a viable option though it is a bit large and designed for matrixes or 7 segment LED displays
74HC595 Not enough current (need around 50~60 mA) to drive the LED's though in combination with some transistors or a transistor IC this might be the best option (3 wires sounds like a dream). Though seperate transistors will complicate the PCB design and again I'm tight on space.
TLC5940 This one looked alright but finding much information about this one was a little hard.
WS2811 IC's Ideally i would want something like this, able to provide a current of ~60 mA per LED but I would have to join the three channels (R,G & B) for this and I'm already using WS2812's, these use a different frequency and i don't know if this would be a problem? (800 kHz and 400 kHz respectively I think)
ATINY I really don't know about this, seems way to complex for just driving 8 single color LED's.
I really really really hope someone can send me in the right direction for I have been stuck for a while and really need to send of my PCB's.
Oh and here a picture of what I need it for:
And a GIF of the working WS2812's