Hi All,

I'm using a 78L05 to keep a stable 5V supply to a simple microcontroller
circuit, the power comes from a standard home-use 9V, 380Ma power adapter,
it works fine so far. However, I want to add a relay to my circuit, which
will easily take up to 80Ma when being turned ON, the 78L05 is now bearly
powerful enough to maintain a stable 5V. Other than that, when the relay is
drawing current, the power adapter output voltage will drop considerably,
this sudden drop and rise in input voltage to the 78L05 will affect its
regulated output as well. What is the usual way to handle this situation,
where a low power consumption circuit is driving a relay, with all power
being supplied by a domestic grade power adapter?

Thanks in advance!

John



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