How to Make an Inexpensive Arduino Photometer #CitizenScience #Arduino #science #water #DIY #3dprinting
Zachary Marlow loves testing water and has a special interest in his hometown Lake of the Ozarks. Although he already owns a spectrometer, a photometer was out of his price range. So, like any good hacker, he decided to make his own and has posted a research note on Public Lab’s site. Using a 3D printer he made a box container to house an Arduino Nano, Adafruit’s GA1A12S202 light sensor, a cuvette and a dollar store laser. The laser turned out to be an interesting challenge.
This a part of the project I was worried about; I was afraid it was going to increase the cost above my goal. To get around this issue I found a pet laser for sale at Dollar General, but I knew aligning a laser with the sensor would add to the results changing too often and the data wouldn’t be constant. To solve this, I found that removing the lens of the laser made the laser act more like a red diode, which didn’t need to be aligned.
Zachary is studying Environment Management and Assessment /Biology, so he definitely has an interest in data. Here’s his hopes for his photometer.
My guess is that people will use it for what it’s designed for and test for turbidity or clarity of water, or combine these results with their spectrometer’s results to find true issues. I know certain construction industries and mining industries create a lot of these issues, and if we can eliminate some of these that would be great to see.
If you have an interest in a DIY photometer, make sure to check out Zachary’s project and give him a follow on Twitter @programmer1200. Testing water samples could be a great citizen science activity for a hike or camping trip!
We are angry, frustrated, and in pain because of the violence and murder of Black people by the police because of racism. We are in the fight AGAINST RACISM. George Floyd was murdered, his life stolen. The Adafruit teams have specific actions we’ve done, are doing, and will do together as a company and culture. We are asking the Adafruit community to get involved and share what you are doing. The Adafruit teams will not settle for a hash tag, a Tweet, or an icon change. We will work on real change, and that requires real action and real work together. That is what we will do each day, each month, each year – we will hold ourselves accountable and publish our collective efforts, partnerships, activism, donations, openly and publicly. Our blog and social media platforms will be utilized in actionable ways. Join us and the anti-racist efforts working to end police brutality, reform the criminal justice system, and dismantle the many other forms of systemic racism at work in this country, read more @ adafruit.com/blacklivesmatter
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.