Telegraph

How do you send message

with an Electromagnet?

pushing down the telegraph key completes the

electrical circuit from the key to one end of the coil

and from the other end of the coil to one end of

the battery and from the other terminal of the

battery back to the other side of the key.

Now the sounder magnet should pull down the

metal strip and make a CLICKING sound. When

you release the key, the metal strip should spring

upwards and make a CLACKING sound.

the difference between the dots and the dashes of

the Morse code by learning to tell the difference

between the pull-in "CLICK" and the release-

"CLACK".

The pull-in "CLICK" is the sound the metal strip

makes when it is pulled in by the electromagnet

coil and strikes the nail which is in the center of the

coil.

The release "CLACK" is the sound that the metal

strip makes when it is no longer pulled by the

electromagnet coil and it moves rapidly upward to

strike the upper nail.

The Morse Code Characters are called DOTS (or

'dits') and DASHES (or 'dahs') They are made from

the CLICKS and CLACKS