Hobbies And Interests
Things You'll Need
Instructions
Print out the project map from the Science Toy website (see link in Resources) and cut out the pattern in the top left corner. Cut a section from the clear plastic and completely cover the pattern with a 1/4-inch overhang. Secure the plastic in place by taping it on the backside, while making sure not to fold any excess tape over onto the front side̵2;either trim it or leave it hanging.
Sand the front of the plastic gently and cover it completely with a thin layer of clear silicon caulk using a serpentine motion. Spread the silicon over the front of the plastic with a thin piece of cardboard.
Cut 16 inches of the 22 gauge wire and ensure that it is straight. Strip the insulation off of the wire. Cut the piece of wire into eight equal smaller pieces, two inches each.
Place the eight stripped wires along the lines of the diagram on the side with the silicon caulk. Cover the tips of the wires with a thin string of silicon caulk. Allow this to dry then remove the pattern and discard it. Turn the fixture over and number the wires using a thin permanent marker, creating the front side of the fixture. Punch holes next to the center of each wire using a thumb tack.
Bend the wires of each transistor so that it looks like a trident. Insert the lead ends of one 3904 transistor into the fixture on the front side, connecting each of the lead ends to the wires numbered two, three and four respectively. Insert the lead ends of one 3906 transistor on the same side connecting each of the lead ends to the wires numbered five, six and seven. Solder them in place on the back side using rosin core solder and cut off any extra overhang.
Cut three sections of two-inch wire and strip 1/8-inch of insulation off both ends. Solder one of these wires to one of the connectors on an 8 ohm speaker and the other end to the number four wire on the fixture. Do the same for the other wire, soldering it to the number five wire on the fixture. Place the third wire on the back side of the fixture as a jumper from number three to number seven and solder it in place.
Connect the black wire from the nine volt battery snap to the number five wire on the fixture and the red wire to number two. Solder them in place.
Connect one lead of the 82K ohm resistor to wire number one of the fixture and the other lead to wire number three. Solder them in place. Connect the 4.7K ohm resistor to wires six and eight and solder the leads in place.
Connect one lead of the 0.01 MFD ceramic disk capacitor to wire four on the fixture and the other lead to wire eight. Solder them in place, ensuring that all of your solder connections are connected securely and do not touch other wires on the fixture.
Cut two strips of wire, six inches long. Strip 1/8-inch of insulation off both ends and connect one of the wires to wire one of the fixture and the other wire to wire eight of the fixture. Solder these in place and wrap the free end of each wire around a separate paperclip. Connect a 9V battery and then place one of the paper clips over each index finger to use the lie detector test.