Patent ID: 8228666

Claim:
A retrofit control unit and DC power supply for a tattoo gun comprising: a control unit housing a printed circuit board with a control logic circuit and components thereon, a visual display interface, a power switch, a battery status switch, voltage adjustment controls, a foot switch cable jack plug, a control cable pin connector receptacle, and a tattoo gun power cable jack plug: a removable battery mechanically engaged in said control unit; an electrical connector having a distal end with a first set of spring expandable conductor arms for engagement with said tattoo gun, a proximate end having a pin connector plug matingly conformed for connection with a pin connector affixed to a first end of a control cable, and a potentiometer voltage control for speed adjustment of said tattoo gun affixed thereon; said control cable connecting said control unit to said electrical connector, wherein said control cable has a pin connector affixed to a second end for connection with said control cable pin connector receptacle; a jack plug formed therein said electrical connector; and a detachable power switch for turning on or off said tattoo gun, affixed at a first end of an extension cable that has an electrical jack formed thereon a second end that is matingly conformed for engagement with said electrical connector's jack plug.