Components:
- Breadboard – The breadboard acts as an interface to connect pieces of a circuit.
- LM7805 Voltage Regulator – Voltage regulators maintain the voltage input. This is important because most components within a circuit can only operate within a certain range of volts.
- Buzzer – The buzzer is a device that makes a noise as an output.
- Push-Button Switch – A push-button switch closes the circuit when pressed. push-button switches act as a good input for initiating a circuit.
- Arcade Button – Same as a push-button switch, but fancier.
- 220 ohm Resistor – 220 ohm resistor is used to limit current in a circuit. In the circuits we did, the 220 ohm resistor is used to limit current that goes through the LED, preventing the bulbs from burning.
- LED – LED is a light emitting diode. In circuit 2 and circuit 3, the LED acted as an output.
- 100 nF (0.1uF) Capacitor – a capacitor stores energy to be used once the energy stops flowing, like in the flash of a camera. In circuit 3, a capacitor was used to stabilize the flow of energy for the dimming light.
- 10K ohm Variable Resistor (Potentiometer) – The variable resistor is a dial that allows the user to restrict the amount of electrical current flowing through the circuit. In circuit 3, the potentiometer was used to variate the amount of current flowing to the led, allowing us to adjust the brightness.
- 12 volt power supply – The source of power for the circuit.
- Barrel Jack – The barrel jack is the connecting apparatus from the source of power (the outlet) to the arduino.
- Multimeter – The multimeter is a useful tool that allows you to do a plethora of things, from identifying connections, to measuring the ohms, current, and voltage of specific components.
- Several Jumper Cables (Hook-up Wires) – Wires connect electrical components and provide a path for the circuit.
Images/Videos:
Circuit 1 – Doorbell:
At first, the voltage regulator was incorrectly placed, resulting in an incomplete circuit.
After realizing our mistake with the voltage regulator, the circuit was complete and the sounds were lovely. This did require a new voltage regulator, due to the fact that our misplacement of the first one resulted in a burnout.
Circuit 2 – Lamp:
Now that we had a complete understanding about how to use the voltage regulator, and our freshly soldered button, we were very quickly able to assemble the second circuit, producing light.
Circuit 3 – Dimmable Lamp:
Question 1:
The process of completing these circuits definitely included interactivity. In our first circuit, we incorrectly placed our voltage regulator, resulting in an incomplete circuit. Thus, when we tried to interact with the circuit by pushing the button and hoping to hear the doorbell, we received zero feedback. This lack of interaction notified us that something was wrong, and once we realized that our voltage regulator was misplaced, we were able to correct that issue and receive the feedback we were expecting. Also, in the third circuit, the creation of the dimmable light, our interaction with the variable resistor resulted in feedback, specifically the light would dim when we increased the resistance, and would be brighter when we lowered the resistance.
Question 2:
Interaction Design and Physical Computing can provide disabled individuals with a medium for doing what was once impossible. In Zack Lieberman’s, we see how he used simple hardware and some software to allow a severely disabled graffiti artist be able to produce art once again. Similar technology has also been developed to allow disabled individuals to be able to play online games. One example of this is in the online point and click based game Runescape, where interaction design and physical computing were used to provide these individuals with a medium for playing the game, and being capable of playing the game to the point where they can do even the most difficult content that very few can do. We have a very interesting future in store.