Another piece requested by my wife, this time to enhance a reading she did at the Ross Creek Centre for the Arts. Her new novel is called the Witches of New York and she wanted a "fortune telling" contraption that created a lighting effect [the reading was planned for outdoors around a fire, but weather forced it inside]. My solution was a "magic cauldron", that lit up when a special spell was cast [hand movements above it]. It was a huge hit and she has used it in other appearances [with some coding changes] to engage the public and her readers.
In a nutshell, an old brass cauldron is given a false bottom, under which I hide the arduino and batteries. The US sensor is mounted under the false bottom [covered in Silver aluminum tape for reflectivity] and "looks" up through two camouflaged holes. We program it to detect a pattern of movements or just a "X time at X distance" affair [we found this worked better].
Once triggered the neopixel ring, mounted above the false bottom and under a mirror [to better reflect the light down and out the sides] activated. It would "play" a pattern that emulated fire or a specific colour that enhanced the performance.
Here are two videos of it in action....
My projects are generally larger scale with multiple systems and some arty components. As such, I rarely do the "full instruction" kind of project share. However, I am very open to answering specific questions left in comments about how/why I may have done something seen in the project posted here. I hope to inspire and possibly assist with these project showcases, so please feel free to post your comments/questions and I will do my best to address them.
More details coming for this one. I believe I took some pics to document it....
I had planned to use a capacitive touch sensor to activate the device, but the brass cauldron and battery power made pulling to ground a real issue.