Sensors
sensors

Relatively inexpensive, transportable and deployable sensors are produced all over the world for a variety of analytes. Broadly defined, sensors respond to a physical or chemical property, providing an interpretable output. For our purposes, a main distinction of a sensor versus a sampler is that sensors do not require laboratory-based analyses, and provide outputs in near-real time. Though we often think of sensors as part of the electronics field, plenty of analog sensors have been available for decades. Common analog sensors include things like mercury thermometers and classic barometers. Common digital sensors include things like voltmeters. In Public Lab, we're interested in a broad variety of sensors, both analog and digital, designed for measuring chemical and physical properties in air or water. ###Air Sensors There are a ton of different air sensors on the market these days, with common analytes including carbon monoxide (e.g. smoke detectors), temperature, humidity, particulate matter, and more. Some of these sensors require a digital interface with a controller and data logger, others are analog. Please see more information [here](/wiki/air-sensors) and check out air sensors in the table below. Please add more sensors that you've used! [embed table] ###Water Sensors Water sensors are available for several analytes, such as salinity, pH, and depth. Like air sensors, water sensors may be digital or analog. Any digital water sensors that are meant to be deployed will require water-tight enclosures for the electronic components. Please see more information [here](/wiki/water-sensors), and check out and add more sensors to the table below. [embed table]...


Author Comment Last activity Moderation
warren "That is the coolest. Here's the video embedded! I wonder if we could read the data off the audio track of the video... " | Read more » about 8 years ago
rmeister "@donblair - Thanks Don, that demo looks awesome! Happy to see that WebJack is in use :) I gladly try to answer questions if there are any issues w..." | Read more » about 8 years ago
donblair "@rmeister -- WebJack is a lovely piece of work! I connected a thermistor to a Pro Mini, used the voltage divider and capacitor setup recommended a..." | Read more » about 8 years ago
cfastie "Thanks Patrick, The table and graphs are screen captures from Excel. The graphing module in Excel is very powerful in part because it has a huge n..." | Read more » about 8 years ago
pdhixenbaugh "How did you make the figures you used in this research note? They are really well done. " | Read more » about 8 years ago
warren "That makes sense. I hadn't been able to find a pinout for the Chromebook, but i'll order that and try it out. " | Read more » over 8 years ago
rmeister "According to the first review on Amazon the pinout of the cable is (from tip to sleeve): Left (white) Right (red) Video (yellow) Ground But as..." | Read more » over 8 years ago
warren "Odd -- the microphone seems to have been running along with the input. " | Read more » over 8 years ago
warren " My_recording__1.wav " | Read more » over 8 years ago
warren "Here's a good resource on many plug standards: http://connector.pinoutsguide.com/4_pin_3.5mm_2.5mm_plug/ But it seems that tip and ring 1 are usua..." | Read more » over 8 years ago
warren "Hmm, i received the two cables I mentioned, but it wasn't recognized as a microphone when I connected them, either in Red-Yellow/Yellow-Red or Whit..." | Read more » over 8 years ago
rmeister "Right, that should be inlcuded in the readme. Yes, echoCancellation is disabled at quiet.js: https://github.com/quiet/quiet-js/blob/master/quiet.j..." | Read more » over 8 years ago
warren "Ok! Would it be possible to mention this stuff in the readme? Have you had a look at quiet.js? Do you think they disable echoCancellation? Thanks! " | Read more » over 8 years ago
rmeister "Sure, but anything above 7kHz will need disabling echoCancellation. gh-pages is currently set up with 2450 and 4900 Hz, echoCancellation active. F..." | Read more » over 8 years ago
warren "Ugh, sorry -- i posted my Leonardo test in the wrong place -- here: https://publiclab.org/notes/rmeister/07-18-2016/webjack-test-without-arduino#c1..." | Read more » over 8 years ago
warren "Wait, though -- can we change frequencies in JavaScript instead of SoftModem.h? Much easier, no? https://github.com/publiclab/webjack/issues/26 " | Read more » over 8 years ago
warren "Ugh, oops. I'll move the comment -- had to use someone else's computer which has a non-combined headphone/mic port, so I was hurried logging in and..." | Read more » over 8 years ago
rmeister "@warren this is the tutorial for testing without Arduino :) Signal looks fine though. Remember to change the frequencies in SoftModem.h " | Read more » over 8 years ago
rmeister "That could work. But you will need an additional adapter for every device with AHJ pinout: https://www.headsetbuddy.com/3-5mm-ctia-to-omtp-smartpho..." | Read more » over 8 years ago
warren "I tried again (after this attempt) and turned down the audio gain, but still didn't receive on the gh-pages demo. It doesn't look blown out: H..." | Read more » over 8 years ago
warren "I'm thinking about how we might add some hints for how to most easily do browser-to-browser over a cable. Just an idea -- what if we used these two..." | Read more » over 8 years ago
rmeister "Leonardo is again a different processor with different names for the timers used in the library. I think we can fix that with some #ifdef's in the ..." | Read more » over 8 years ago
warren "Hmm, the Leonardo also failed to compile with similar errors to the ATTiny -- odd; I wonder if there's something wrong with my setup in general... ..." | Read more » over 8 years ago
warren "I also have a Leonardo I can test this out on, I'll dig it up. " | Read more » over 8 years ago