- microcontroller
- low powered can run on a battery for days
- runs small simple programs
- Arduino is a company in Italy that designs many curcuit boards
- Circuit and Desihn of Arduino boards has been made free by Company thats why many third party make Arduino circuits but not with name of Arduino
- many Versions of Arduino are available from simple to more complex that can integrate Wifi connections as well
to supply power to devices
- 5V
- 3.3V
sending and recieving serial data
Digital Inputs and outputs
used to measure voltage (0-5V)
- pin 13 has inbuilt register
- setup section in IDE is used to initialise pins