The present invention provides a unique and novel, low-cost external assembly that can be used to add a pulsed current functionality to a continuous welding machine. The external assembly is located in series between a pedal for controlling the welder and the welder itself. The external assembly includes a controller that modifies the pedal input signal typically entering directly into the welder. The modified signal converts the continuous welding machine such that it operates as a pulsed welding machine.