OK, I've stripped down a dual-arc lighter, and reverse engineered the circuit.

Seems to be just 2 mosfets, a few resistors and the pulse generator/LiPo charger that I won't be needing at this stage.

I've started coding a Arduino Nano clone to generate the note, as done previously here:

http://ultrakeet.com.au/write-ups/modulated-arc-lighter

After that, I'll add in VL53LOX TOF sensor support.