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Power supply considerations

A project log for goMon

Govecs Electric Scooter Remote Monitoring

nuno-cruzNuno Cruz 11/27/2015 at 00:340 Comments

Power will come from two sources:

The battery power line will have a NO relay connected to it that will be closed from the arduino itself. This will allow the arduino to completely power off in case of low battery. It will come back to life when the ignition is turned on, by the 12V.

Meanwhile, since we're tapping the ignition line, lets add another relay (NC now), that will be used to remotely kill the scooter, in case of emergency or if stolen.

One thing I'm in doubt is if the arduino prefers to be powered from the DC jack or from the 5V. Probably won't be an issue. The rest of the logic will be always powered from the battery via DC/DC.

By the way, the DC/DC will be a 110-230V power supply that I tested and provides 2.5A from at least 48VDC to 96VDC.

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