This Arduino-powered telegraph project will teleport you 160 years into the past
Hello, makers community! My name is Savva Osipov and I am thirteen years old. As a lover of gadgets and projects, I wanted to share my current “birthday project” with the Arduino community!
In November of this year, I turned 13 and for my birthday I got a bunch of spare parts for a new exciting DIY project which was inspired by a visit to the Computer History Museum!
Let’s teleport 160 years into the past, when telegraph lines first started to connect the two coasts of the United States. My telegraph system is powered by an Arduino Nano and while it’s not running coast-to-coast, it is an entertaining DIY project to have fun with friends or family, of course, other geeks and makers.
The idea for this project came to me when I found a similar project described by a Russian maker in a popular online maker community, Geektimes.ru. His project used a wooden body, but I’m a true fan of a 3D printer, so I decided to make some enhancements, like a plastic body instead of wood. I’m using a MonoPrice III printer for all of my projects.
By the way, the video I’ve shared with you has clips from the Computer History Museum in Mountain View. I am showing the original Telegraph by Thomas Edison, which was built in 1875. See the full video of my visit to the museum on my YouTube channel.
Which hardware and electronics do you need to create your own telegraph?
Two motors: Stepper Motor and Servomotor
Two different motors are used in this project. One pulls the telegraph paper and one rotates a pencil. A rubber bead put on a wooden stick (inserted into the first motor) will pull the paper forward. You’ll need telegraph paper for this to work, but if you do not feel like ordering that, you can cut any paper piece of paper to 0.43 inch width.
This is the motor I used, but you can choose any size that will fit into the small body of the gadget. Link to the servomotor on Ebay.
Stepper Motor, 28BYJ-48
Again, this is the one I used, but you can replace with one that can fit into your body. Link to EBay.
0.1 Inch Axis
Any material works for this, I selected a wooden one. See pics above.
Black round bead shown in the photos above was taken from old, unused headphones. Or you can just buy spare parts on Amazon.
This pulls the paper up and down and is what is used to make spaces in the paper. Link to Ebay.
On and Off switch
Any size is fine on this.
Arduino Sketch is able to print 128 different symbols, which includes Cyrillic and Latin symbols, as well as digits. If you want to add any other symbols, you can use Java-based font converter program on GitHub.
When the program starts it types “Hello”.
Bluetooth Module HC-06
This part is needed to connect the telegraph machine with your phone.
The guy who created the original wooden telegraph mentioned earlier also developed the Android app that catches any push notifications on the phone, like text messages or tweets, and sends them to telegraph via Bluetooth.
This one fits into the small body of the telegraph so it is preferable.
You’ll need a universal FR-4 Glass Fiber Breadboard, a diode, a one kOhm resistor and a TIP120 transistor.
Telegraph assemble scheme
Here’s a scheme of the future telegraph device.
Telegraph body file in 3D
I created a new body for the “future” telegraph machine that I built. Here’s a link for that. Please note that all the parts conveniently click into the body making construction very easy. Link to download.
The hardest part of the project is to adapt the quality of the printing.
When everything is in place, it’s time to test and send a text to the machine via Bluetooth. You can add the telegraph gadget as a remote bluetooth device in your settings. Don’t forget that Arduino port size is 64 bytes only. Don’t send messages that are too long — 64 characters is currently the limit.
My name is Savva Osipov, me and my dad are working on a Kickstarter campaign for our project that we are planning to launched in January. If you are interested in learning more and being kept up-to-date, subscribe to my YouTube channel.