8x16 led matrix power circuit

Hi. I'm building a tetris game and I'm really constrained by which type of circuit to use.

First try: Using two 74hc595 without any power drivers. My teacher: use some power drivers besides them. Second try: Using two max7219 led drivers. My teacher: Naah, too easy.

Question. Is there any kind of 74hc595 but which can handle more power?

Yes: tpic6c595!

Warning: tpic’s outputs can only sink current. They cannot source current. Keep this in mind when you design your matrix.

If you need to source more current, you can put a pnp transistor on each output of a 74hc595.

Paul

Yes, I did spot that after I first posted. OK, forget it ...

Paul__B, did you not spot this quote from the OP's teacher?

Second try: Using two max7219 led drivers. My teacher: Naah, too easy.

Not to say we shouldn't challenge teachers when necessary, but it sounds like this one knows what he/she is talking about. May be they want the OP to learn about multiplexing.

How about this one: TLC5925IPWR? is it ok? does it sink current?

Or this one: SCT2210CSSG

If your teacher is guiding your choices, it is him to whom you should be posing these questions - not us! :roll_eyes:

alexmath: How about this one: TLC5925IPWR? is it ok? does it sink current?

alexmath: Or this one: SCT2210CSSG

Those might also work. Make sure you buy the chip in a package you can work with, for example DIP. Also check with your teacher that these chips do not make the project "too easy".

"Discrete" muxing example.
Enable each row < -- > for 2-3mS for Persistence of vision display.