# Interaction Lab Recitation 1 documentation

Ningran Song

Partner: Peixuan Yu

Professor: Marcela Godoy

Exercise1

Circuit 1

Components:

12 volt Power Supply: provide electricity

LM7805 Voltage regulator: regulate the voltage to make it be appropriate to other components

Buzzer: speaker, make sound

100 nF (0.1uF) Capacitor: store up electricity and stabilize and smooth the flow of electricity

Push-Button Switch: control the flow of current through a junction in a circuit

Barrel Jack: turn AC to DC and maintain the voltage

Jumper Cables (Hook-up Wires): connect the whole circuit and carry electrical currents

Process:

At first, we have no idea of connecting the circuit and we tried to connect it just with our own understanding. The first problem we met was that we lacked wires. We asked the professor and found that our connecting process was mostly wrong. After being taught the right connecting order, we solved this problem and learned the importance of reading the right order showed in the diagram. Also, the professor pointed out that there was still a problem in our circuit. Then we realized that we nearly made a short circuit because we put the voltage regulator horizontally. Then corrected it. Afterwards, we found it hard to push the switch into the breadboard. To solve this problem, we tried again and again. With the help of another professor, we learned that we had to put the switch across the center divider, which means that half of it was in one side of the center divider and the other half was in another side, and we needed to connect two sides with a wire diagonally. In the last part of connection, we were confused about what was ground. After professor’s instruction, we learned that the long row with negative power was the ground.

Interaction:

By pressing the push-button switch, the buzzer can make sound. The circuit worked at the end.

Circuit2

Components:

12 volt Power Supply: provide electricity

LM7805 Voltage regulator: regulate the voltage to make it be appropriate to other components

100 nF (0.1uF) Capacitor: store up electricity and stabilize and smooth the flow of electricity

Push-Button Switch: control the flow of current through a junction in a circuit

Barrel Jack: turn AC to DC and maintain the voltage

Jumper Cables (Hook-up Wires): connect the whole circuit and carry electrical currents

220 ohm Resistor: resist the flow of electricity and control the flow of current

LED: indicator lamps

Process:

We maintained half of the circuit1 and replaced Buzzer with a resistor and a LED. Since we have met many problems and solved them in the first circuit, it was quite smooth to connect this one and no problem occurred. One thing we noticed was that LED was polarized so we need to pay attention to the correct direction when connecting it with other components.

Interaction:

By pressing the push-button switch, the LED was turned on. The circuit worked with just one try.

Circuit3

Components:

12 volt Power Supply: provide electricity

LM7805 Voltage regulator: regulate the voltage to make it be appropriate to other components

100 nF (0.1uF) Capacitor: store up electricity and stabilize and smooth the flow of electricity

Push-Button Switch: control the flow of current through a junction in a circuit

Barrel Jack: turn AC to DC and maintain the voltage

Jumper Cables (Hook-up Wires): connect the whole circuit and carry electrical currents

220 ohm Resistor: resist the flow of electricity

LED: indicator lamps

10K ohm Variable Resistor (Potentiometer): control the flow of current

Process:

We did not change the circuit2 but just added a variable resistor between the resistor and LED. When connecting the wires with the variable resistor, we chose the wipers on two sides at first. And we found that when we rotated the knob, the light of LED did not change. Then we recalled the knowledge of the variable resistor and realized that we should connect the middle wiper with one of the other two wipers since they had positive and negative anodes. We corrected the connection.

Interaction:

The light of LED could brighten and darken by rotating the knob.

Exercise2

Question 1

Do you think that the circuits you built today include interactivity?

Yes, I think that the circuits we built included interactivity. There were two “actors”: push-button switch and LED/buzzer. Pressing the push-button switch was input/“listen”. The process of circuit was think/“process”. The light of LED and the sound of buzzer were output/“speak”. The circuits met the definition of interactivity. But it was a kind of low interactivity because the “conversation” was very simple.

Question 2

Identify which components used today were sensors, and which components were actuators.

Sensors: push-button switch

Actuators: buzzer, LED

Question 3

How can Interaction Design and Physical Computing be used to create Interactive Art?

We can combine interaction design and physical computing together to create interactive art. For example, the second project mentioned in Zach’s speech can turn car’s track into colorful lines by using displacement sensors and related computer software. The design of car’s track is an interaction design and the computer software is mainly about physical computing. The combination of them creates this interactive art project. So with the help of physical computing, we can turn interaction design into real interactive art more easily.

## One thought on “Interaction Lab Recitation 1 documentation”

1. pretty well done Sunny,