Continuing wth the breadboard

There are two switches we looked at; slide switches and push buttons.

Slide switches are what the name implies, a sliding mechanism that allows current to flow from one circuit to another.  Each circuit must flow from positive to ground for the system to work.

Push buttons work by pushing the switch to make contact with the circuit.  The two forms are: "normally closed"- the current flows until you push the switch, "normally open" - the current flows when you push the switch. 

 

  Relays have coiled springs inside to switch contacts between ciruits when you push the switch.

Can be imagined to be like car blinkers.