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. 🙂
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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.
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