Finalize List of Sensors

[ausshir]

Comment below on what you want on the HAB!

[ausshir]

Some things we discussed:

• Pressure
• Temperature
• IMU With Accelerometer, Gyroscope, Magnetometer

[ottopasuuna]

Do we want to revisit the sound experiment we did a few years ago?

[bht822]

Do tell more sir

[ottopasuuna]

If I remember correctly, we had a speaker on one stabalizer, and a microphone on the other. Then analyze how the sound changes as altitude increases.

[ausshir]

I believe we were not able to pick up the sound over the wind noise, so we'd need something to solve that (subwoofer in the sky??)

[bht822]

I see I think use arduino and device an experiment it's simple as well ,but speed of sound do depends on temptation and pressure if I'm not wrong .

[ottopasuuna]

What type of sound did we use last time, white noise? Could we select frequencies that cut through the wind, then try to filter out the wind? I think wind would be white noise though, so filtering that out would remove everything.
Did we have any sort of windscreen to prevent wind blowing directly on the mic?
Or we could try to messure wind speed and direction using a microphone array. 😄
Just thinking out loud here.

Also, (calibrated) Geiger counter.

[bht822]

Muffler on the receiver /mic? Or like a filter which picks up only on the certain frequency generated by the transmitter/mic ?

[ausshir]

@ottopasuuna: I think it was just a tone, probably 1khz but I don't know exactly. I don't seem to have any code from that launch!

Wind would definitely be white noise, but you could come up with some noise cancelling setup with multiple microphones.. kinda out of scope though!

@bht822 A better sock/muffler might be the way to go haha

[ausshir]

This was mentioned on the Slack and I thought it should be recorded here as well! The idea is to use a pump to get some high-atmosphere air and then grow the bacteria in it.

"To collect the bacteria we used a diaphragm pump connected to an IOM sampler. The IOM sampler contained an 8 nanometer polycarbonate filter and IOM MultiDust Foam Disc. We started the pump once the capsule reached well within the stratosphere at 60,000 feet and turned it off once it fell back below 60,000 feet."

[jjball]

A waterproof temperature sensor that goes from -55 to 125 degrees celsius
https://www.sparkfun.com/products/11050

There is also a smaller temperature sensor if we want one inside the box (-40 to 125 degrees C)
https://www.sparkfun.com/products/10988

And then a altitude/pressure sensor that connects via I2C digital output
https://www.sparkfun.com/products/11084