Controlling and reacting to the environment

• To control or react to the environment we need to interface the microcontroller to peripheral devices

• Things we want to measure or control

  • light, temperature, sound, pressure, velocity, position

• Sensors

  • switches, photoresistors, photodiodes, phototransistors

• Actuators

  • motors, relays, LEDs,

• Software

• Microcontroller

  • executes software
  • may contain specialized interfaces to sensors and actuators

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