Basic LED Questions

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What's the use of a LED driver ( ? ) if a resistor is enough ?

maybe unrelated but in the digital world, many chips won't be able to source or sink the current needed to drive an LED or drive it for long periods of time. I've often had to use drivers (or buffers) to light LEDs from the outputs of other devices like an FPGA or microcontroller.
 
azira said:
maybe unrelated but in the digital world, many chips won't be able to source or sink the current needed to drive an LED or drive it for long periods of time.


aren't there leds that shine different colors when driven by different voltage / current / frequency?

so you can use a driver to control the color.
 
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