1st Inter Lab Documentation – Leon Ding

Lab Time：9/6/2019

Partner：Andrew Xie

Components Used：

• • 1 * Breadboard
  • 1 * LM7805 Voltage Regulator
  • 1 * Buzzer
  • 1 * Push-Button Switch
  • 1 * Arcade Button
  • 1 * 220 ohm Resistor
  • 1 * 10K ohm Resistor
  • 1 * 10K ohm Variable Resistor (Potentiometer)
  • 1 * LED
  • 1 * 100 nF (0.1uF) Capacitor
  • 1 * 12 volt power supply
  • 1 * Barrel Jack
  • 1 * Multimeter
  • Several Jumper Cables (Hook-up Wires)

Lab Content:

• • Door Bell Circuit
  • Lamp Circuit
  • Dimmable Lamp Circuit
  • Solder

Detailed Description:

• • Door Bell Circuit

(The draft of the circuit we should build)

1. Connect the breadboard with current source (Positive pole with + and Negative pole with -)

2. Plug in the Voltage Regulator.

For this step we encountered some trouble for not knowing which foot should be connected to which side. Then we asked the prof and finally found the answer on the website (as this picture shows below).

3. Connect the buzzer and button.

It’s where we encounter a very interesting and worth thinking problems. We plug the button in and run the whole circuit, only to find out that the buzzer kept ringing and the button didn’t work. When we had no idea how to deal with this problem, it suddenly occured to us that we might connect the button in a wrong way. And we turned it 90 degrees, it worked.

• • Lamp Circuit

• • Dimmable Lamp Circuit

These two experiments are bascially the same as the buzzer one, except the dimmable lamp circuit need a Variable Resistor as a dimmer .

• • Solder

The whole production process is very simple, just take care not to touch the welding pen tip with your hands, and when removing the rubber part at both ends of the wire, it should be longer, or it will be difficult to plug into the bread plate, because we did not realize this, it was very difficult to carry out the experiment later.

Q1:

I think the part of the circuit which reflects the interactive thoughts most is the switch. By using this little button, we make the whole circuit’s on/off under our control, and an action of pressing the button could get a interactive feedback (like buzzing or lighting). So that’s why I consider that interactive.

Q2:

Maybe we should bring human-beings factors and operation into the conversation with art work or design work, which would obviously make the whole thing seem more controlable and interactive.