Patent ID: 7883375

Claim:
An electrical adaptor comprising: a first connection assembly including a first printed circuit board, a first connector mounted to a front segment of the first printed circuit board, a first variable resistor mounted to a rear segment of the first printed circuit board; a second connection assembly including a second printed circuit board, a second connector mounted to a front segment of the second printed circuit board, a second variable resistor mounted to a rear segment of the first printed circuit board; a cover member enclosing the first connection assembly and the second connection assembly therein; and wherein the first printed circuit board and the second printed circuit board are disposed at different levels and partially overlapping each other; wherein the first variable resistor is located above the first printed circuit board and the second variable resistor is located below the second printed circuit board; wherein the first variable resistor has a rotational wheel partially projecting outside via a recess defined in a lateral side of the cover member, and the second variable resistor has a rotational wheel partially projecting outside via another recess defined in another lateral side of the cover member; wherein the rotational wheel of the first variable resistor and the rotational wheel of the second variable resistor are substantially disposed at same level.