IMG_1513.MOV 1a. What line(s) of code do you need to change to make the LED blink (like, at all)?
pinMode(13, OUTPUT);
It should be blink though, it doesn't have to be changed
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1b. What line(s) of code do you need to change to change the rate of blinking?
digitalWrite(13, HIGH);
delay(1000);
digitalWrite(13, LOW);
delay(1000);
Change delay
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1c. What circuit element would you want to add to protect the board and LED?
Resistor
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2a. Which lines do you need to modify to correspond with your button and LED pins?
const int buttonPin = 2;
const int ledPin = 13;
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2b. Modify the code or the circuit so that the LED lights only while the button is depressed. Include your code in your lab write-up.
if (buttonState == LOW)
{
// turn LED on:
digitalWrite(ledPin, HIGH);
}
else
{
// turn LED off:
digitalWrite(ledPin, LOW);
}
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3a) Which line(s) of code do you need to modify to correspond with your LED pin?
int ledPin = 9;
Already hooked up to port 9 though
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3b) How would you change the rate of fading?
for (int fadeValue = 0 ; fadeValue <= 255; fadeValue += 5)
Change the fadeValue increase
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3c) (Extra) Since the human eye doesn't see increases in brightness linearly and the diode brightness is also nonlinear with voltage, how could you change the code to make the light appear to fade linearly?
According to this, make the brightness change to match this graph (log)
You didn't say how to change the code. +0.25
3a. What is the minimum resistor size that should be used with these LEDs? (Hint: think about your voltage supply and what the diode voltage drop means.)
V = IR
2.8V = .03A * R
1.8V / .03A = 60Ω
R = 60Ω
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4a. Is there computation in your device? Where is it? What do you think is happening inside the "computer?"
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Yes, each different button relates to a different signal to send to the T.V.
4b. Are there sensors on your device? How do they work? How is the sensed information conveyed to other portions of the device?
There are a multitude of buttons to record and send input
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4c. How is the device powered? Is there any transformation or regulation of the power? How is that done? What voltages are used throughout the system?
Batteries (2 AA)
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4d. Is information stored in your device? Where? How?
Yes, each button has a memory of different signals to send to the IR LED
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___V___ V is LED
I . . I
I ....... I . are buttons
L__EE__L EE is chip
I . . . I
I I
Power Ground