Today, we learned about how to check the voltage of a battery, what is affected by the voltage, and how circuits work.
We learned how to use a digital multimeter to check the voltage. You put the red (positive) side on the positive side of the battery, and you put the black (negative) side on the negative side of the battery. We learned how you use a different setting depending on the voltage.
After we learned about voltage, we started talking about circuits and how to build one. I already knew a little about circuits because my elementary school had a maker space where they explained circuits. Also, my brother used to have this really fun toy where you had a bunch of pieces, and you connected them to a board in order to get it to do what you wanted it to do. You could make a fan, light, etc.
First, we played a game where you would have to make a circuit out of wires, a light bulb, a battery, and a switch. It was pretty easy. Then we turned up the voltage on the battery and it went on fire. We learned to use a resistor to prevent that and you could make it more ohms to resist more. The harder part was making two separate paths for two separate light bulbs, so if you turned off the switch, only one would go out. Just like how you would want to buy the Christmas lights that didn’t all go out if only one was broken.
The circuits we made were different and cool. We took wires that were open at the edges so you could use the conductive metal, a battery pack, a switch, and a lightbulb. Then we put it all together. There were three screws on the switch. You had to unscrew two of them a little bit. Then you put the metal part of the wire under the screws and tightened them. Then you did the same thing for attaching the other side of the wire to the light bulb. To make the circuit work, you turn on the battery and flip the switch. Then the light bulb lights up.