So before i do anything a found an old NFC antenna around. Measuring the inductance, getting a capacitor to make it resonant and added a full bridge rectifier to charge a capacitor bank.

The outcome ... well just by polling alone i was able to make the LED glimmer....
According to my calculations im able to get a "constant" ~1mA@2,5V .... kinda impressive .... lets see where it takes us.
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