This describes the steps for making the automated water tester. The design has slightly changed since the initial post. The original design required printing a central stalk which all the parts attached to. The stalk was 310mm long, which meant that a large format printer was required. In addition, it was difficult to print it without warping. Based on some suggestions, I redesigned the tester to use a piece of 2020 extruded aluminum as the central stalk as well as in a few other parts that were long. The tester parts can now be printed on a printer with a 150mmx150mmx150mm build area.
The autotester is controlled through a web interface.
For convenience, I have broken the assembly into multiple parts:
Each Friday is PiDay here at Adafruit! Be sure to check out our posts, tutorials and new Raspberry Pi related products. Adafruit has the largest and best selection of Raspberry Pi accessories and all the code & tutorials to get you up and running in no time!
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.