2022-09-16 Recitation

Task 1:

when the circuit works, the buzzer rings and the lights are turned on. The battery provides electricity, the wires transmit the current, the resistors limit the current so the LEDs and the buzzer can work properly, and the potentiometer can make the brightness of the LED changeable.

The circuit worked well at last, but we failed a couple of times because we neglected that there was a short circuit between two components or that the LED was broken. We worked together and found out the faults with the help of the fellows.

Task 2:

I learned that the copper can transmit electricity while paper can not. I sticked the copper tape to the cardboard, used soldering tin to connect the wire with the copper tape and the switch worked very well.

Task 3:

We learned the Morse code, and type it by tapping the switch. We typed ‘NYUSH’ and recorded it.

Question 1:

The restrictor R1 limits the current, in order to protect the LED and adjust the brightness of the LED to an appropriate amount.

Question 2:

Question 3:

I think the circuit includes interactivity of input and output. It listens(by the button)  and speaks(by the buzzer). When we press the button, we transmit information to the circuit. When the buzzer rings and the LED shines, it transmit information to human.

Question 4:

They can be used to provide the computer with information coming from outside.