Electronic and microelectronic control systems

• The voltage across a protective resistor is ALWAYS the total voltage minus the voltage across the component being protected.
• RELAY

  A) Relay

  
• An open loop system is a system that has an input and output only. Examples include a light switch or hand dryer.
• A closed loop (continuous control) system uses feedback. The system will have a means of checking what is happening at the output at any point in time and, if necessary, changing this output. Examples include heating systems and a refrigerator.
• The 'arrow' of a diode points toward the cathode
• Diodes are used to prevent back EMF from damaging components. They are placed in reverse bias
• Flowchart blocks

  A) Arrow

  B) input / output

  C) process

  D) Decision

  E) Terminal

  
• Advantages of Robotics

  • They produce very fast, automated procedures accurately.
  • They can be used in dangerous/unusual environments.
  • They can be extremely hygienic.
• Disadvantages of Robotics

  • They can be very expensive to install/set up/replace initially.
  • They need highly trained professional to operate them.
  • They cannot make decisions for themselves.