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Forum High school student creates 200 mile transmitter.
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High school student creates 200 mile transmitter.

Eavesdropper
Eavesdropper over 15 years ago

High school science projects are unusual to say the least. Projects usually consist of the ‘rock candy’ experiment to the ‘we can change the world’ presentation. There are a few that stand out in ingenuity and innovation and this student project is no less exemplary in its simplicity. While doing a class project that was to gather data with the use of a high altitude balloon, a student by the name of Scott decided to include a homemade transmitter with it. Using a 74HC240 octal buffer is using to amplify the signal (Morse code) from an ATTiny44a with a 29MHz oscillator, he was able to send and receive a signal from over 200 miles away. Scott say’s in his jubilation that, “I’m completely amazed at how well the transmitter/receiver worked! For only a few milliwatts, I was able to track that thing all the way from takeoff to landing in Gainesville, FL a few hundred miles away.” Not too shabby for a high school project.image

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