1.5v src, LED needs 3v, now what?

I had recently read and experimented w/ darlington pairs and thought I
could use them as a voltage increaser, but looking back, I realize they
only allow for a very small base current to open up the C/E.

My problem is that I have a 1.5V source and a circuit that needs 3v to
operate(I think) I have implemented a TI LM393P comparator and it
appears to need a MIN up 2v to operate (per the TI Data***) and my
LED would like to have 3v.

What is the standard solution to something like this? I'm a
newbie(duh) and I'm having a hard time finding the answer to this.

I hope someone will shed some light on this for me.

oh, adding another battery ins't an option and changing from a AAA alk.
isn't an option either ;)

Thank you,
Steve

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