Where can i find a diagram of a simple LED relay?

Question

I'm in grade 11 and i can't find a diagram of a simple LED relay(using an electromagnet), you know so that the lights go on in turns.

An alternative is to find a diagram of a bell that rings(using an electromagnet).

PLEASE HELP!!! I don't understand this homework.

Answer 1

What you are most likely looking for is a standard relay with an LED indicator that illuminates when the relay is energized. Check page 6 on the attached link and check out the "With Indicator (-L type)" SPDT (Single Pole Double Throw) relay.

Answer 2

No way to tell what you need on the LED thing, your description is all wrong.

Here's the bell tho:

http://www.answers.com/topic/electric-be...

http://www.footprints-science.co.uk/elec...

You can also search for electric chime, which is technically a bell. It's what most people have for a doorbell.