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1  Forum 2005-2010 (read only) / Development / Re: Library for TLC5940 16-channel PWM chip on: October 12, 2010, 03:56:59 pm
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!
2  Forum 2005-2010 (read only) / Development / Re: Using a 595 Shift Register and TLC5940 together on: October 13, 2010, 04:27:46 am

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!
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