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Make your own Power Meter/Logger

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let's say you have an awesome gadget

that uses a USB connection to charge its

battery year or simply uses USB power

directly to work properly in both cases

a so-called USB power meter can be

useful tool to measure the voltage of

the USB port the current your gadget

draws the power it does needs and most

importantly it also locks how much

energy is transferred this way after

converting the value to kilowatt hours

you can simply multiply this value with

the price per kilowatt hour and

therefore for example calculate that

wireless charging a smartphone

cuz you 0.15 U or more for every 100

charges now of course you can get such a

power meter for cheap on eBay but in

this video I will show you how to create

your own portable upgraded version which

has a wider voltage range a higher