The autosampler is slowly, but surely, progressing. After securing the necessary money, and finding and purchasing parts, I have taken the first few steps towards completing the autosampler. To remind everyone, this autosampler will allow us to use the autosampler to monitor urban runoff during rains, as it happens (without having our volunteers stand in the rain for hours).
Currently, I am working on refining my home-built peristaltic pump. Peristaltic pumps use compression to push water. Skateboard wheels will compress a plastic tube to push water from the creek and into the sample bottles.
The pump frame has been built, and the skateboard wheels have been installed. The wheels, along with some tubing, will be doing the heavy lifting of the water. Once the pump is finished, and pumping, the next step will be to set up the valve array, which will distribute the samples into their respective containers.
From here, I expect the pace to accelerate, as the pump will probably be the part that I need to fiddle with the most. After the valve array, the final step will involve powering and connecting all of the parts into a computer controlled system. I am planning on using two Arduino microprocessers working in conjunction as the brains of the system.
While working on the autosampler, I have learned a great deal about prototyping and design. In its current state, the autosampler is not much more than a prototype. I was surprised about all the fiddling and adjusting needs to happen in order to make this run perfectly. This project has been an enlightening experience: there are hundreds of things that will go wrong. But I will fix all of them.
Working on the autosampler in general, and the pump specifically, has given me the chance to explore new horizons. I have a project where I have creative freedom, will have an impact, and combines an appealing career path, robotics, and my work here at Coastkeeper. It’s a nice balance to my school work. I appreciate the hands on experience that I have gotten with engineering and design, something I probably would not have without Coastkeeper’s help.
The currently anticipated deployment date is in late August, early September. Ish. That said, when I was first talking about this project, I thought I could have it out by March. We’ll have to wait and see.