Tag: Arduino
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Updated OWHL assembly video
I have revised the Open Wave Height Logger electronics assembly video as of March 2020 to include narration (uh-oh) and more information about the programming process and error codes. This video outlines the entire assembly process for soldering the components to the 3 circuit boards of the OWHL Revision C design. The current designs and…
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Building a new bivalve gape sensor datalogger
It’s construction time in the laboratory again. This time we’re building shell gape sensors for oysters, based on a datalogger design derived from the MusselTracker datalogger I designed a few years back. In this new design, we can have up to 16 gape sensors attached to one datalogger, though we’ll just have 10 to start…
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Time lapse camera using ArduCAM
Design files and code for this project can be found here: https://github.com/millerlp/Time_lapse_arducam The goal of this project was to build a cheap and power-efficient time lapse camera to monitor some of my experiments in the field. The camera would capture an JPEG image every 30 seconds and write it to a micro SD card, and…
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Arduino compile error: the filename, directory name, or volume label syntax is incorrect
GetFileAttributesEx D:\Arduino\libraries\SdFat/SdInfo.h D:\Arduino\libraries\SdFat/SdSpi.h: The filename, directory name, or volume label syntax is incorrect. The error message above started cropping up shortly after I upgraded to Arduino 1.6.8 on Windows 7 x64. The cause seems to be due to some folder becoming locked in the Arduino compile pathway. One solution seems to be to close the…
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Building a simple tide clock
Myself and Jeremy Long recently had a paper published in PeerJ (open access, free to read) describing the use of an Arduino microcontroller to predict tides and regulate the water levels in aquaria in synchrony with the natural tides. You can read more about that tide controller system here and further variations here. As part…
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Controlling tide height in lab aquaria
A few years back I posted about a set of Arduino libraries I wrote to allow an Arduino with an attached clock to predict the tides for a coastal site. In that post, I showed a variation on the theme that had a motor-driven rack that transited up and down in time with the tide.…
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Electronics parts list
Here’s the start of a list of common bits and doo-dads I use for building electronics projects. https://github.com/millerlp/parts_guide/blob/master/parts_guide.md That’s all there is to it.
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Open Wave Height Logger prototype in the water
I finally got around to deploying a prototype OWHL unit in the real live ocean to log some waves. The low-tech housing is made of 1.5″ schedule 40 pvc pipe. The pipe snugly fits the D-cell battery holder, while the electronics fit inside the modified 1.5″ end cap. I try not to rely solely on…
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Revised Open Wave Height Logger battery tests
The Open Wave Height Logger is meant to be a submersible pressure logger that will record absolute pressure at 4Hz for several months to give a record of wave height, and ideally do this on a single set of 3 D-cell batteries. I have recently made a few changes to the OWHL software, and discovered…
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Early Open Wave Height Logger battery tests
Following on the previous post about the Open Wave Height Logger project, I’ve been conducting a simple battery life test. One of the prototype OWHLs was powered by a 3 D-cell alkaline battery pack and shoved in the freezer for 32 days. The image below shows the collated daily data files for that time period,…