Some years ago, the Swedish physician Torsten Thunberg discovered a thermal illusion. If you take 2 different temperatures, both temperatures being in the comfortable range, but alternate them on the skin, then a very powerful sensation of burning is felt. This was called "Thermal grill illusion", and it reminds of the Bene Gesserit's Pain Box Test, from the amazing Frank Herbert's book, "Dune".
This is a device that reproduces the thermal grill illusion using 5 cheap Peltier elements:
- Align 5 pieces of TEC1 - 12706 thermoelectric Peltier elements at about 1 cm each.
- Connect all of them in parallel, and apply about 7.5 Volts.
- No fan or temperature control is necessary at room temperature. Natural convection is enough.
Does it really works? Absolutely!
It works surprisingly well.
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