Hello all,

Does someone know if it's possible to use 21 daisy-chained TLC5940 (just daisy-chain, not multiplexing) with an Arduino? All the TLCs would be on the same PCB to avoid too long wires... In the datasheet, TI says that the limit is 40, but what in real life?

Thank you for your answers!

Hello,

Is it possible to multiplex 2 TLCs with a 4017?
The decade counter (4017) turns one row high and the TLCs update the different columns. I guess the outputs of the 4017 need a transistor to supply the current for all the LEDs in the row.

Do you think that make sense? Is it doable with a NPN transistor?

Thank you guys!