I did not know about resistors before doing this activity, I thought that any battery (one that can be bought at a regular store not some huge car one or something) could power this circuit. I did not know that if the volts were too much it could break the LED. I also learned about the breadboard, which makes it a lot easier to organize wires and make sure they go into the right place. The final thing learned was how the Arduino worked, and how I could program from my computer.

Picture 1: Lighting up the LED with a 9v battery

Picture 2: Making the LED blink with the Arduino

The two circuits above show how the breadboard, resistors, and the Arduino can be used together. The first is using resistors to allow the 9v battery to power a LED. The second one is with the Arduino and with  a computer program to make the LED blink at certain rates.