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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 (do not clip the wires too close to the plug). ## Cut the two loose ends to different lengths, to prevent accidentally touching them together. ## Separate the two wires and strip the loose ends of each. ## Twist the end of each wire to join the loose strands together.# With the DC voltage setting on the multimeter in the appropriate range, identify which is the positive and which is the negative wire comeing coming from the adapter. ## WARNING: To do this you need to plug the adapter into the wall. Be sure that you do not touch the two wires together, this will short out your power supply. If it is easier, use two of the alligator cable to cover the free ends of the wires. ##Is the positive wire labelled in any way? Tie Attach a knot in red alligator cable to the positive wire, so that it is shorter then and a black alligator cable to the other (preventing a short-circuit)negative wire. This is also an easy means to distinguish between the twostandard color code for positive and negative wire.
# 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?)