Our next unit is building switches (and Solder People). We will be using cardboard, tin foil, straws, hot glue, popsicle sticks, etc. The tin foil is the conductive material that will be used for turning a light bulb on.
What you’re supposed to do is build a switch out of available materials that will make the light flash. In order to do that, you will have to attach the tin foil to the switch so that when you flip it on, the tin foil touches another side of tin foil. One alligator clip will be clipped on each side to make the light flash. You will have to build three switches which will be used in a game at the end, so you want them to be fast and efficient.
I will make a lever, a button, and a sliding switch. For my lever, I will make a straw lever with a popsicle stick and a rubber band attached. The popsicle stick will have tinfoil taped to it so it will be conductive. In front of the lever, there will be another piece of tinfoil taped to be conductive. Behind the lever, there will be another popsicle stick where the other side of the rubber band will be. This will allow the lever to turn off as soon as I turn it on for speed.
For my button, I will make a straw button that will go up and down- like a button. I will make a little box with two sides missing. On the bottom inside of the box, I will attach tin foil to make it conductive. On a little straw, I will attach tin foil to the bottom to be conductive. To make it turn off right after I turn it on, I will attach a rubber band to the straw. The other side will be attached to a hook made of a popsicle. In the box, I will make a hole in the middle to insert the straw button.
For my sliding switch, I will take two little pieces of cardboard and slide them to turn it on and off. On the edges of both pieces, I will tape on tin foil to make it conductive. On the side of each of them, I will make a hole. In the hole, I will insert a straw to allow the boards to connect and slide. Next to the switch, I will have a popsicle stick so that each time I slide the switch on, it will turn back off.
While we are making our switches, we are also creating Solder People. We will be using brass wire and solder. My solder person will be waving its hand. In order to take the materials and create a solder person, I will have to use pliers to bend the wire. There will be two wires. One is five inches long and one is three inches long. The five inch wire will be the legs and head and the three inch wire will be the arms. In order to connect these pieces, I will have to melt solder with a soldering iron on to my solder person. Then it will be finished.
Soldering irons are very dangerous because it gets as hot as 842º. You have to cool it down and clean the tip on a wet sponge and brass wire sponge. To use the soldering iron, you have t0 attach the parts you are soldering to alligator clips. If you hold the brass while you are soldering, your hand will burn to a crisp.