I bought one of these circular bargraphs from Sparkfun. A 16 LED bargraph with two common cathodes.
I'd like to drive it from a single chip to free up I/O on my micro, and not take a bunch of cycles running soft PWM. There are many chips, like the TLC5940 that can do this, but they can only sink current, not source it. A 74HC595 solves the first, but not the second, and is limited to 70mA total.
I've tried every combination of search term I can think of and have only come up with 7 segment drivers, which are overkill and never have individual dimming. So does anyone know of a chip I'm looking for? Or am I better off tossing this and making my own out of individual LEDs?