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HamShield lets your Arduino talk to far away people and things using amateur radio bands (Coverage: 136-170MHz, 200-260MHz, 400-520MHz)
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An Arduino Nano mount that fits on the battery of a Baofeng UV-5R or BF-F8.
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Baofeng Arduino Backpack

Tim

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A monster flashlight containing a 100W 8500Lm led with big heatsinks and batteries. With morse function to tell the night goodbye.
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While trifting I found a battered old dusty morse key. After cleaning it up, I decided to build a break out HID box for it.
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Morse key HID + ugly hack

voxnulla

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The 19th century texting device meets the 21st century
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RPi Telegraph

Ed Danis

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Add your own "Morse password" to the intercom in your residential building
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Daddy, I don't have the key

Voja Antonic

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Building on my RPi Telegraph project, the Arduino Teletype translates characters to baudot code and drives a teletype.
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Arduino Teletype

Ed Danis