Hi Guys !
I have 4 door sensors with an arduino to have a simple sound trigger but also calculated how much peoples are getting by (helping a small museum in town). I'll skip the details but the thing is I need to make theses connected to DC to avoid batteries changes (staff too busy). I figure the simple way to do it is using the arduino voltage out to the sensors.
I find this simple question complicated becuz I wonder if the current drain from the arduino will be enough for 4 sensors, so does capacitor might do the trick or if this is not the way to do it, I wonder if the AMP from the power supply should be higher ?
My calculation are that each sensor need 2x 1.5 volt batteries so it's approx. 3 volt @ 500mA
But I've tried the arduino output and 3.3volt does the trick, very good with one device.
Here a quick diagram of the setup.
If there is an expert in the room, stand up !
thank for your support
Element 14 is GREAT !!
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