analogue inputs

• what does a microcontroller do?

  takes signals from an input device, can be programmed to make specific descisions & tells output device what to do
• advantages of microcontrollers

  • size of circuit can be significantly reduced
  • can be programmed many times - allows changes to be made without replacing components
• disadvantages of microcontrollers

  • cost more than traditional integrated circuits
  • programming software & hardware required - expensive to buy
  • language of system needs to be learned - training costs
• what can an analogue signal do?

  program at what point in a wave the light would switch on. devices give out analogue signals e.g. LDR