[LewisM]

I am an electrickem noob - total noob.

I want to make an adaptor to go from a regular cigarette adaptor with a 2.5mm plug coming out to a Vixen Sphinx Starbook (which uses a proprietary power plug grrr....).

The Sphinx connection is centre +.

By standard, are cigarette lighter plugs centre +, therefore the centre of the female 2.5mm jack centre + too? (I have packed my multimeter so can't check).