Making Our Own Telegraph

This time I wanted to share the knowledge about how to make a telegraph by simple and use it to send a message. I read in a book of science, to be honest I myself have never tried to built  it, but I might try sharing here. Hopefully useful.

The first one we need:
- 3-inch bolt
- 3-inch nail
- Iron hinge
- Metal strips
- Bell wire
- Screws
- Rubber band
- Batteries 1.5 v
- Woods as shown in the picture

First make a telegraph sounder and key, assemble materials as shown in the picture below. Use a tin cans to make the metal strip for the key.

When you turn on the current by pressing down the key, the hinge should go up and touch the bolt with click sounds. Adjust the height of the electromagnet, if necessary, by turning the nut.
When the current is off, the hinge should drop back on the nail with another click. If the hinge stays up, adjust the pull of the rubber band.
This picture below shows how two sets telegraph Should Be connected. Use the International Morse Code  to send your message. Happy experimenting ....