Review

• Digital in/out
• If()

serial.print(), serial.println()

other variables

• int
  const int
  long
  char
  string
  boolean or bool
  byte

• char: can store one letter e.g ‘a’
• for strings, use double quotes: “abc”
• byte: 8 bits: 0-255 unsigned

Resistive sensors

• Light sensor
• Does the circuit remind you of anything?
  • voltage divider https://learn.sparkfun.com/tutorials/voltage-dividers

• analogRead()

• Other resistive sensors: force Sensitive Resistor (FSR), bend sensor, thermistor
• Potentiometer

Dimming an LED

• analogWrite()

Do along with me

• Build potentiometer circuit
  • Always test first with built-in example
  • First make blink speed
  • Then make fade
  • Maybe make both?
• map()
• constrain()
• The example we developed in class is here

Miscellaneous

if()

all possibilities

&& || !

millis()

Assignment due Tuesday February 18

Reading

• Read the readings from the reading list. If this is assigned to you, be prepared to lead the discussion

Production

• Get information from at least one analog sensor and at least one digital sensor (switch), and use this information to control at least two LEDs, one in a digital fashion and the other in an analog fashion, in some creative way
  • If your previous assignment already did all these things you may reuse it, or create a new system.
• Document your work:
  • Create a new folder in your github repository called “February18”
  • Upload a picture of your circuit schematic.  Your schematic, whether hand drawn or otherwise, must be clear. Remember what a schematic is and is not.
  • Upload a photograph of your project
  • Create a new file called “description.md” and include:
    • A description of your concept and how it was achieved
    • Your schematic
    • Your photograph
    • Problems, if any, and solutions, if any
    • Anything else you can think of
  • Upload your program. Remember to keep the .ino extension so that it is formatted properly.