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# Connect the positive and negative rails running along the top and bottom of the breadboard--red wire for positive and black wire for negative (pic).
# Use the continuity setting on your multimeter to check the connectivity of the positive and negative rails. (pic).
# Clip the end of the power adapter off, saving enough wire with the plug to reconnect the two later in the semester (i.e. do not clip the wires too close to the plug or you will not be able to reattach ). Separate the two wires and solder strip the two later)loose ends of each.# With the DC voltage setting on the multimeter in the appropriate range, indentify identify which is the positive and which is the negative wire comeing from the adapter. Is the wire labelled in any way? Tie a knot in the positive wire, so that it is shorter then the other (preventing a short-circuit). This is also an easy means to distinguish between the two.
# Using one red and one black alligator clip and a short length of red and black hookup wire, connect the positive and negative lines from the power supply to the appropriate power buses on the breadboard.
# Check that you were correct using a multimeter or bulb/resistor combo. (The bulbs are 6V bulbs, we have a 12 Volt supply. How can we see that current is flowing without burning the bulb out?)