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1/ My #IoT Telegraph - A thread:
At the end of my talk @NottsTechfast on "The History of IoT", I closed with a show stopper demo. I built a homebrew Telegraph from wood, nails, spring, wire and other components I had around the house. @msdevUK, @MSIoTDevs @MicrosoftIoT #MVPBuzz
At the end of my talk @NottsTechfast on "The History of IoT", I closed with a show stopper demo. I built a homebrew Telegraph from wood, nails, spring, wire and other components I had around the house. @msdevUK, @MSIoTDevs @MicrosoftIoT #MVPBuzz
2/ The basic circuit diagram of the Telegraph is shown here. The Transmitter side has three 1.5v AA Batteries which connect through the rudimentary Morse Button out to an Electromagnet at the receiver. 
3/ The receiver side has two 1.5v AAA batteries connected to three nails. The angled nail is attracted to the Electromagnet when it's activated, closing the circuit and activating the sounder.
