Using high efficient step down voltage regulators instead of linear voltage regulators that waste power as heat and requires large heatsinks in most cases.
The Chimney Sentinel project was created for preventing fire caused by wood-burning appliances by containing a probe that can be inserted into the chimney.
H Bridge configuration is commonly used in electrical applications where the load needs to be driven in either direction. A typical H-Bridge structure is shown below...
The SMT reflow oven controller is based on H8/3687 microcontroller which can be used to transform a conventional infrared toaster oven into an effective reflow oven that performs thermal control.