(Winter 2013)
I've been wanting to build a weatherized electronic thing, and an ROV fits the bill. An ROV (= remotely operated vehicle) swims around underwater, and in this case sends video and any sensor information up to your laptop. I've been following the OpenROV design.
Parts include:
1. A BeagleBone linux processor (similar to Raspberry Pi) for sending video and sensor information
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BeagleBone linux processor (top of board on left, bottom on right)
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2. An Atmega328 chip for handling inputs and outputs (Atmega328 is the main microprocessor on the arduino). Arduswimmer is the name for the BeagleBone cape that is being made to do this. I'm just going ahead and building the schematic.
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Schematic of how the Atmega chip hooks up to the BeagleBone (BB) (openrov-electronics) in Fritzing
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3. Fancy lazer cut parts. Adam Summers - a prof at Friday Harbor Labs, has hooked me up with a laser cutting company named Epilog. Many ROV bodies are made out of PVC pipe, but OpenROV has a laser cut design I thought I'd try out.
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| Glueing the laser cut parts! |
The OpenROV wiki has a really neat video shot around NOAA's underwater laboratory, Aquarius. Here scientists can live underwater for a week or two at a time and do hours of underwater fieldwork daily without becoming bent (this is known as saturation diving). As for a bit of gossip on Aquarious - I've been hearing it's being decommissioned. According to the website, the last research missions for the Aquarius were this past summer (2012). It would be a shame to lose the only underwater laboratory in the U.S.
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Data logging SD card shield for arduino: Fridge temperature and light level logger
(Summer 2012)
(Summer 2012)
Analog light and temperature readings are recorded onto an SD card using the arduino SD shield kit.
I just followed the arduino tutorial for this.
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Light and temperature logger (and Marmotti in the corner looking on...)!
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Step-motor light/dark cycle automator using arduino
(Summer, 2012)
(Summer, 2012)
I needed something to automatically cycle between light and dark for some photosynthetic yield experiments. Here is a picture of the setup. The lab I was working at happened to have a great step motor and wheel that I could use. The cycler is triggered by a saturating pulse from a halogen lamp on a fluorometer (not shown).
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Light-dark cycler
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