How to Create a Morse Code Telegraph in Minecraft

Create a "send" station by stacking two blocks on top of each other placing a sign labeled "send" on top and a stone button below. This will be one side of our telegraph and so I've labeled it blue.

Run redstone wire from the send button to the other end of your telegraph where your messages will be received. Be sure to add enough redstone repeaters to keep the signal flowing. Keep in mind that many servers (if a redstone pulse travels too far out of site) it may get stuck or lag out.

Connect the redstone wire to a block with a redstone torch on top of it. On this end of the telegraph, I have labeled everything red.

Place a second block above the first redstone torch and place a second redstone torch on top of it. You will notice that the top redstone torch turns off. The top torch is the torch that will relay the message sent from the blue side of our telegraph.

Cover up the unnecessary elements around the top redstone torch and place a sign reading "receive" below it.

Here I have built a second version of the first sender / receiver we built, this time with a sender for the red side and a receiver for the blue side.

Place a redstone lever next to the block holding your redstone button. You may choose to label the button dot and the lever dash as we did above.

Run redstone from the torch to the line of redstone you have already running to your redstone button.

Now when you send a dash activate the dash lever, wait about two seconds, and then deactivate it. This will send an extended pulse which will appear as a long signal. The dash will appear as a quick signal and may be pressed in quick succession for ease of use.

At this point you may also choose to attach a note block to the input sides of your telegraph. Doing so will allow you to not only see, but hear the signal coming in. I suggest placing the noteblock on dirt because it will give off a higher pitch note which is easier to hear.

Here is a classic example of Morse Code. SOS was used for decades as a distress signal by airplanes and maritime vessels alike. SOS is made up of two letters: S and O. S in Morse Code is three dots, and O is three dashes. So the signal when written out looks like "... --- ...".

To send SOS to your partner(s) at the opposite end of your telegraph we will click the stone "dot" button three times as quickly as possible, then we will turn the redstone "dash" lever on and off three times, and finally we will hit the stone "dot" button three times again.

If we send the message correctly, it will appear as three quick pulses on the receiving redstone torch, followed by three long pulses on the redstone torch, and finally three quick pulses on the redstone torch again. Of course if you're really in danger in Minecraft, it may be best to run away instead of taking ten seconds to send "SOS" to your friends in game.