Resume after power lose in Marlin

I'm trying to add this feature in my marlin code for my 3D-Printer.
I want to use a sensor that detects the power source loss before the capacitors lose the power inside.
If you success doing it without batteries or UPS, please contact me via email (available in my profile) and we will discus the cost later on after we agree about the possibilities to implement this feature.
Regards,,

Too late, I already patented that idea.

joking, gee you guys are too serious....

Prusa already implemented this in his fork of Marlin, but he needed a separate power fail sense board and also special support in the electronics to turn the bed heater off. The Duets running RepRapFirmware achieve the same thing without additional hardware, because power monitoring is built into the Duet and the processor is fast enough to turn off the bed heater in firmware.

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Delta printer calibration calculator, mini IR Z probe, and colour touch screen control panel: [escher3d.com]

Large delta printer, and other 3D printer blog postings: [miscsolutions.wordpress.com]

Disclosure: I have a financial interest in sales of the Panel Due, Mini IR height sensor, and Duet WiFi/Duet Ethernet.

Here is a solution for this that no need UPS and battery, just use capacitance.