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In most good horror movies there is a mad scientist (or mad engineer?) who needs to turn on his equipment for bringing a monster to life or other such thing. Typically there are big sparks as the switch makes contact as it does not have suitable suppression circuitry. I loved the idea of having such a switch but did not fancy having live electricity exposed to the users and real sparks are fun but also not that safe.   So I built my own knife switch. The first step was to model it in CA ...
Inspired by the Indian Jones film "The Temple of Doom", I teamed up with "The Kuriologist" to make a skull bowl with jewelled eyes. The electronics are pretty simple. The "brain" is an Adafruit Gemma, some LEDs and a piece of audio wire screening to act as a sensor for the capacitive touch sensors.   The skull was made from scrunched up tape rolls, newspaper boxes and paper mache, the gemma was housed in a small cardboard box. The Kuriologist based the design on an ape skull and covered ...