4.5-40V to 5v usb enclosure with switch box
thingiverse
Built a solar setup to harness energy from the sun and put it to use on several of these devices, now I have to slide them out to activate the system by hitting the enable button, but that's not a major issue. I'll adjust that in the next version if I decide to print another one, making adjustments so there's less hassle involved. This is the device I bought from eBay. 5V 2A USB Charger Voltmeter Step-down DC-DC Buck Converter 4.5-40V Car Power Supply for 12V and 24V Systems
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