relays

Ahh Relays...the hardest of all the circuit componants...well i thought it was.

A relay could be thought of as a magnetic switch, were a low amp circuit to switch on a higher amp circuit.
The Relay will have a coil of wire inside that will create a magnetic field when the circuit has power.
The second circuit in the relay will be a switch that when the first circuit is on, the magnetism will pull the switch in the second circuit on, completing the relay and turning on whatever component it is connected to.

We learned how these worked by testing them on lights.
We made up a circuit that involved the Relay component, then added bulbs to the circuit.
Turning in one switch on the circuit made the 2 out of 3 bulbs glow and the second switch on the circuit made all three glow brightly...the relay was working.