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Powering a USB device from a battery
Comments
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Thanks. One other thought. Since it is only 2 watts or thereabouts, you might find a solar charger to run it (in daylight at least). Looking at the replacement pumps, they work down to 3.5 volts, so hopefully the volt-drop along a longer cable would not be a problem (but then I've got no idea what the resistance of a cheapo usb cable is!)
Are the cats using it, by the way?1 -
A super soaker is another cheap way of giving the cats a jet of water.1
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One is using itcoffeehound said:Thanks. One other thought. Since it is only 2 watts or thereabouts, you might find a solar charger to run it (in daylight at least). Looking at the replacement pumps, they work down to 3.5 volts, so hopefully the volt-drop along a longer cable would not be a problem (but then I've got no idea what the resistance of a cheapo usb cable is!)
Are the cats using it, by the way?
The other is terrified of it1
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