Another possibility might be to swap out C42 and C43 for higher voltage
caps if you can keep your unregulated source down to 16V max. The
TPS6111 on the Tobi is rated for the higher voltage. I don't understand
why they used smaller caps and restricted the voltage.
Bruce
Oliver Mischke wrote:
> Hi,
>
> I have a question concerning the power supply of an overo water together
> with the Tobi expansion board.
>
> I need to power both boards with an unregulated dc input voltage of
> 5-18V, therefore (afaik) I cannot get stable 5V to power the barrel
> connector. After looking at the schematics it seems like one option
> would be to directly attach 3.3V (SV1 Pin2), which is connected to
> VSYSTEM and should power the COM module without problems. The only part
> that needs 5V seems to be the USB interface. I could live without USB,
> so might this solution help or am I missing something?
>
> Any help would be greatly appreciated.
>
> Thanks,
> Oliver
>
>
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