Each of the 5 light bulb outputs can control a blue welding light bulb. The light impulses are realistically short and strong. As each of the 5 bulbs generates a pattern of its own, it is possible to "weld" at several different workplaces at the same time (for example in "shipyard").
There are pauses in the welding process of one or more minutes at irregular intervals. If the input JP2 is switched
to earth, the light sequence switches off after the completion of the program. If the contact remains open, the program repeats continuously.