[time-nuts] Synergy systems evaluation board power requirements.
bruce.griffiths at xtra.co.nz
Wed Sep 30 00:48:01 UTC 2009
Bruce Griffiths wrote:
> I have one of these for the M12+T.
> Yes it requires a higher voltage.
> There is a surface mount 7805V regulator on board so an input voltage of
> 9V or so is recommended (thats what is supplied by the plugpack that
> came with it).
> There is a 3V SMT regulator on board as well for the GPS receiver module.
There is also a diode in series with the 78M05 5V regulator input for
protection against reverse supply polarity.
This increases the effective dropout voltage of the 5V regulator to
around 7.6V or so.
the centre conductor of the power supply connector should be positive,
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