Intro to Physcial Computing

WEEK 2

Lab 1 Digital Input and Output with an Arduino

Setup:
Push button: 20D, 20G, 23G, 20D
Red Wire: 20A, Voltage Bus
Blue Wrie: 23C, Arduino D2
10K Resistor: 23B, Ground Bus

Add Digital Outputs (LEDs)
Blue Wire 2: Arduino D3, 28A
Blue Wire 3: Arduino D4, 25A
Top LED: 25H, 27H
Bottom LED: 28H, 30H
220ohm resistor 1: 25D, 25E
220ohm resistor 2: 28F, 28E
Black Wire 1: 25J, Ground Bus
Black Wire 2: 28J, Ground Bus

Input: Pushbutton
Computation: If button is pushed, top led lights up, if else, bottom led lights up.
Output: LED light

Lab 2 Analog Input

Setup:
Blue Wire 1: Arduino A0, 24C
Blue Wire 2: Arduino D9, 25J
Red Wire: 23A, Voltage Bus
Black Wire 1: 25A, Ground Bus
Black Wire 2: 32I, Ground Bus
220ohm resistor : 25I, 29I
Red LED: 29J, 32J
Potentiometer: Left side: 23D, 24D, 25D, Right Side, 23G, 25G

Question: why is the led light blinking while turning the potentiometer, instead of changing state? What does the A0-255 means in coding and the only number worked are A0, A4.

Setup:
Phototransistor 1: 22F, 21F
Phototransistor 2: 27F, 28F
Blue Wire 1: Arduino A0, 28D
Blue Wire 2: Arduino D9, 31D
Blue Wire 3: Arduino A1, 22D
Blue Wire 4: Arduino D10, 34D
Red Wire: 21A, Voltage Bus
Red Wire: 27B, Voltage Bus
Black Wire 1: 32J, Ground Bus
Black Wire 2: 36J, Ground Bus
10K Resistor 1: 22C, Ground Bus
10K Resistor 2: 28C, Ground Bus
220ohm resistor 1: 31F, 31H
220ohm resistor 2: 34F, 34E
LED 1: 31I, 32I
LED 2: 34I, 36I

Obersevation: Only of the LED has light changes while touching the phototransistor. Range: 400-900, A0-255

Lab 3 Sensor Changes Detection

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XUAN 2024