Week 4 Notes

February 2nd Class Notes

How to get what you want

• website to create DIY components
• kobakant.at/diy/

UUID - long enough number that it won’t be reproduced
NFC - near field communication, stores data

In Visual Studio Code

• right click -> go to definition
  • explains a line of code and what is needed
• liquidcrystal is an object variable
  • has properties and methods
  • properties are attributes
  • methods are what it can do

OOP/OOM - object oriented programming/method
dht11 - our humidity/temperature sensor

• has power, group and signal pins

ultrasonic sensor - has power, ground, signal and echo pins

SPI - serial periferal interface

• sck - clock
• miso - input
• mosi - output

i2c

• scl - clock
• sda - data

Buying Components

• qwiic - sparkfun connector, allows i2c connection to sparkfun arduino
• seeed studio - similar to qwiic, but exclusive to grove
• mouser.com or digikey - where to buy components
• our chip - atmega328p
• if sorting by price, all add quanitiy
• every component has a data sheet

What is in a data sheet

• absolute maximum voltage - not what we want to use all the time, max without shorting
• typical voltage
• order code table
• mechanical diagrams/dimensions - picture used may not be what shows up, make sure this is what you want
• part number breakdown - lists what each letter/number in part number means

Programs for Modeling Circut Boards

• Fusion 360 (eagle)
• Diptrace
• KiCAD

• Exeda

• need gerber files to create board
• our machines need g-code files to mill boards (CnC machines)

a joystick is essentially 2 potentiameters and a button
limit switch indicated location 0 on both ends of a moving track