Materials used

Our project is basically divided into two parts: input and output. For the input part, we used a 3V laser pointer, a dynamic microphone, a 3904 transistor, 3 resistors, a 358 op-amp, and two 9V power supplies, one to op-amp, and another one to the speaker. We also used 3V power supply to power the laser pointer. For the output, we only use a solar panel and a mini-amplifier speaker.