DIY Near Space Balloon Transmitter: 60 Mile Range on a Budget

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Discussion Overview

The discussion revolves around the feasibility of launching a near space balloon equipped with a microcontroller and a pressure sensor that transmits audio data back to Earth. Participants explore various methods for achieving a 60-mile line-of-sight transmission without resorting to expensive ham radio equipment.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant proposes using a microcontroller with a pressure sensor to transmit audible beeps based on height data.
  • Another participant questions the utility of audible beeps, suggesting that a GSM chip might be a cheaper alternative for communication through cell phone towers.
  • A different participant raises concerns about the effectiveness of transmitting sound at high altitudes, noting that the atmosphere may not support sound transmission as expected.
  • A participant clarifies that the audible beeps refer to electrical pulses that create sound on the ground, which vary with height.
  • There is a question about the range of cell towers and whether they could provide coverage at the altitudes intended for the balloon.

Areas of Agreement / Disagreement

Participants express differing views on the method of transmission, with some advocating for audible beeps and others suggesting GSM communication. There is uncertainty regarding the effectiveness of sound transmission at high altitudes and the coverage of cell towers.

Contextual Notes

Participants have not reached a consensus on the best method for transmitting data from the balloon, and there are unresolved questions about the technical limitations of sound transmission in near space.

tackyattack
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I am thinking about launching a near space balloon. I'm going to send up a microcontroller with a pressure sensor that outputs audible beeps according to the height data from the pressure sensor. The problem is I don't have a way to transmit this audio data back down to earth. What is the cheapest, simplest way to make a transmitter that can transmit 60 miles line-of-sight? I don't want to buy a ham radio transmitter cause those things cost $100+. Any ideas?
 
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What's this about audible beeps? Why would you bother with audible beeps? The cheapest way might be to buy a GSM chip and communicate through cell phone towers.
 


Don't know how far up you think "near space" is, but if you get up as high as balloons can go, "audible" is not going to have much meaning since there won't be enough atmosphere to transmit much sound.
 


KingNothing said:
What's this about audible beeps? Why would you bother with audible beeps? The cheapest way might be to buy a GSM chip and communicate through cell phone towers.

By audible I mean pulses of electricity that is fed into the communicator's input, on the receiving end I hook up a speaker to communicator. The pulses make sound on the communication unit on the ground. The sound will change according to height.

What is the range of cell towers? Would It be able to reach all the way up there?
 

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