Hi all, I'm trying to get an 7-segment LED display working. For now, I've done it with a PCF8574 expander on I2C, and this works well. The problem is that I forgot to add a resistor array to limit the current to the segments so I don't expect the LEDs to last long. So far for my thought 'why not ta…

7-segment display driver, external resistors needed?

Chagrin April 30, 2014, 7:25pm 2

TLC5916 or TLC5925 are shift registers that implement current limiting (set by a single resistor for all channels on the chip).

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