Thankfully, in these times where we can't help, we can help! The hospitals are in need of equipment. Our nurses, doctors and volunteers need our help! If you have a 3D printer, you can print facial shield holders which are actually really useful to all who are close to our infected fellow humans! One suggestion: https://www.thingiverse.com/thing:4240920 Several other suggestions: https://www.facebook.com/groups/1205752362782946/files/ Let's help!
This is a fun puzzle to solve. Has several mazes stacked on top of each other. Once one level is completed, the ball falls to the next level. The tricky part is that this should be solved blindly... You shouldn't be able to see the ball, just ear it and feel it as it goes through the maze. Maps can be used to help the player, however, the maximum difficulty level for this puzzle is to mentally map the maze (no aid) and solve it just by feel, focus and dextrous movements. It can be seen and printed on Thingiverse here: https://www.thingiverse.com/thing:2771165
This is my first Instructable... A colour selector using an Arduino, Processing and an RGB LED. It enables the user to mix colours in all the visible spectrum. You can check the full Instructable here: http://www.instructables.com/id/RGB-color-selector/
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