Making a fabric speaker

• Background : After careful consideration of which will the best way to deliver this story of domestic abuse, I chose to build a sound system with virtual visualization. I created the survivor’s house and character with camera movement in Unity. I built 4 spaces of her house – her bedroom, living room, dining room, and a large room they used as a study. I put 4 soundtracks of her testimony in each space, along with other ordinary domestic sounds I recorded separately. After doing so, 4 video experiences were created. 

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• Goal of this project : I made a circuit that is controlling DC motor in 3 different ways – on/off, adjusting speed, and changing direction. In order to turn the motor on and off, I used button switch, and to change direction of the motor I used H-bridge and button. And by the “analog” value read from potentiometer, the speed is also adjustable.
• Assembly description : To change direction of the DC motor I used H-bridge. The one I used is SN754410 and I found data sheet of that model through internet search.

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• Goal of this project : I would like to make a sample version of TV’s display of indicating channels and volume and remote control. Using IR receiver module and remote control, it will enable users to control channels (number) and volume (up and down).
• Assembly description : I made a circuit that IR receiver module and 7-segment display to be connected to the arduino uno. IR receiver module has three legs – one (G) is for ground, the other one (R) is for Vcc, and the last one (S) is for signal. I connected the signal pin to pin 11, and set an additional led in pin 13 so that user could know the signal is receiving or not (We could also know through the tiny light on IR receiver module). For 7-segment display, the each pin represents each different stroke that constitute a number (including period “.” to confirm the exact direction of numbers). It has total 10 pins, 8 of them representing strokes are connected to each different output pins, and two of them are connected to the ground.

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UART

Universal Asynchronous Receiver / Transmitter : One of serial communication standards that Arduino can do with other devices. Its principle is similar to the conversation between two people. In order to have conversation, we need ears to hear, and mouth to talk. What one person talks through mouth goes to the ears of the other person. In this context, we can compare ears to RX(Receiver), and mouth to TX(Transmitter). The point is this: the data coming out of one side of TX(mouth) goes to other side of RX(ears), not TX(mouth). Which means, between different devices, RX and TX should be cross-linked.

In addition to RX and TX, electronic devices need to be linked ground to ground. Because each device has its own electric potential, unless one device’s ground is connected to another device’s ground, the data transmitted cannot be received correctly.

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• Goal of this project : I made a circuit enables RGB LED to be on/off and change the light color corresponding to both sensor – ultrasonic sensor and photoresistor. I used RGB LED to change its color according to the distance detected by ultrasonic sensor, and also it will be on/off according to the light of space detected by photoresistor.
• Circuit and components : Arduino, RGB LED, Ultrasonic sensor, photoresistor, 3 x 220ohm resistors(for RGB LED), 1 x 1K ohm resistor(for photoresistor), jumper wires          * RGB LED has 4 legs – three legs are for red, green, blue output color, and one long leg is for ground.

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1. Goal of the project : By utilizing a sequence of button presses, make multiple leds to radiate. Like a concept of lock, each led represents whether it is locked / unlocked.
2. Core components : 4 buttons, 4 x 10K ohms resistors, yellow and blue leds, 2 x 220 ohms resistors, breadboard, arduino board, jumper wires
3. How it works : I made a circuit that enables a certain rule of button press to make each led shine. When button 1 and button 3 are pressed at the same time, yellow led emits, and if button 2 and button 4 are pressed at the same time, blue led emits.
4. Problems encountered : A little confusion with making a circuit for multiple buttons – where to the power and output connections go – but I figured out with reminding the basic mechanism of buttons.

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