The Antuino draws 0.080ma at 5v.
With a linear regulator to 5v, the regulator is dissipating (12v-5v)*0.080 = 0.560 Watts.
Much over 12v going in and the LM78L05 will soon overheat and go into thermal shutdown.
See the datasheet for the Theta-JC and Theta-JA? (junction to case if case has a good heatsink,
junction to ambient air if just air cooling).? Those specs give the temperature rise of the silicon junction
for a given dissipation in Watts.
?
Jerry
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On Thu, Sep 5, 2019 at 07:05 AM, Garry48 wrote:
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This gent says 9-12VDC, but the voltage regulator data sheet says it will take up to 30VDC.? Take note of the milliAmp rating.? It is low, so I'd stay at 12V or less.? No sense converting voltage into heat.
There is a group on groups.io; when I find it, I'll post it.
Garry / WD0DUD
