Social Object: Peltier Unit

Peltier effect, also known as Thermoelectric Cooling, is commonly used in mini fridge, it acts as the cooling agent. The Peltier effect is the presence of heating or cooling at an electrified junction of two different conductors and is named after French physicist Jean Charles Athanase Peltier, who discovered it in 1834. When a current is made to flow through a junction between two conductors A and B, heat may be generated (or removed) at the junction.

Peltier Module uses this effect, with two pieces of ceramic plates cover the each side of the junction, when a current flows through, one side becomes freezing cold (down to -30 degree Celsius) the other becomes burning hot (up to 70 degree Celsius). This effect can be used to generate electricity, measure temperature or change the temperature of objects. Because the direction of heating and cooling is determined by the polarity of the applied voltage, thermoelectric devices can be used as temperature controllers. 

The most peltier unit runs 12v DC, but with my experience, anything lower than 12v will still work, just the matter of how effective it will be. For this project I'm using 9v battery, a brief test confirmed that the effect will still take place with 9v input. And so the Peltier Module is my feedback mechanism.