cheap, safe emergency rectifier
cheap, safe emergency rectifier
(OP)
The old aluminum-cell: Al and Fe electrodes in e.g. borax solution. It can rectify up to 40V per cell and can't fail catastrophically. If was used for elevators before
more efficient solutions were found.
more efficient solutions were found.





RE: cheap, safe emergency rectifier
http://www.tinaja.com/glib/muse117.pdf
etc. for more info