But the twinkle effect until recently has been hard to describe. Typical flashing bulbs use a bimetallic strip. As the filament of the bulb heats up, the strip bends, opening the circuit.

This video explores heat conduction in brass and iron.

[Nathan Petersen] built a Hackable Open-Source Thermostat to smooth out temperature fluctuations caused by the large hysteresis of the bimetallic strip thermostat in his apartment. While it may ...

Bimetallic strip toasters are usually older models, and run on a circuit system connected by a bent strip. When the heat gets ...