> Russell McMahon wrote:
> >As Patrick noted, you can add a SMALL input resistor to each one to
> >encourage them to share the load.
>
> I don't think you can do it with input resistors, they
> have to be on the output, as the output is closely
> regulated by the opamp in the chip regardless of input
> volts. ie, connect one 7805 to 12v and one to 8v, both
> will output the same volts, at least within a couple mV
> chip tolerance. Resistors must be on the output, and YES
> it will work fine.

Yes. I started with the input resistor case as it had been mentioned
elsewhere. Further down I pointed out that the regulator action fought
against you and that output resistors gave far better results. In fact our
recommended resistor values and the compromise values we suggested are both
very similar.

Then again, buying a higher current regulator ma be easier :-)
(But I think Jim has a lot of 78L05s to use up (based on a prior post) so
this may be a good reason to get out the resistor box).




        RM

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