Diy Telegraph: Difference between revisions
From wikiluntti
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== Telegraph Key == | == Telegraph Key == | ||
<gallery> | |||
Telegraph_key.png | |||
</gallery> | |||
== Telegraph Sounder == | == Telegraph Sounder == | ||
<gallery> | |||
Telegraph_sounder.png | |||
</gallery> | |||
About 200 turns of electric wire should be enough for the electromagnets. | |||
== Wireless Telegraph == | == Wireless Telegraph == | ||
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== References == | == References == | ||
Blender files: | |||
[[File:Telegraph.zip|thumb]] | |||
Most of the diy'ers are simple and effective. | Most of the diy'ers are simple and effective. | ||
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* https://www.alvenh.com/misc/projects/telegraph/ | * https://www.alvenh.com/misc/projects/telegraph/ | ||
* http://w1tp.com/tcg3e.pdf and http://w1tp.com/ | * http://w1tp.com/tcg3e.pdf and http://w1tp.com/ | ||
** Lever shapes: STRAIGHT LEVER (1844-1881), CAMELBACK LEVER (1848-1881), STEP LEVER (1850’s-1881), | |||
CURVED LEVER (1881 - present). | |||
Latest revision as of 22:43, 18 November 2025
Introduction
Telegraph Key
Telegraph Sounder
About 200 turns of electric wire should be enough for the electromagnets.
Wireless Telegraph
Digital Storage
A Morse code can be crudely represented as the following five-bit strings
- dot or dit '1'
- dash or dah: '111'
- Intra character between the dits and dahs: '0'
- Short gap between letters: '000'
- Medium gap between words: '00000' or seven bits
https://en.wikipedia.org/wiki/Morse_code#Representation,_timing,_and_speeds or https://en.wikipedia.org/wiki/Morse_code#Digital_storage
References
Blender files: File:Telegraph.zip
Most of the diy'ers are simple and effective.
- https://www.alvenh.com/misc/projects/telegraph/
- http://w1tp.com/tcg3e.pdf and http://w1tp.com/
- Lever shapes: STRAIGHT LEVER (1844-1881), CAMELBACK LEVER (1848-1881), STEP LEVER (1850’s-1881),
CURVED LEVER (1881 - present).
