The head is constructed for three filter layers á 1cm. That seemed like an overkill and I only wanted to use two filters. But as you can see in a lot of makes of this fume extractor: If you use less than three filters they do not align perfectly and look wavy or bumpy.
So I came up with this very simple redesign of the optional backstop. It hosts a 1cm high spacer ring. This way, two filters stack on top of each other and neatly align with the rest of the head. No waves, no bumps. 🙂
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.