This Mega Meter project was built around the ATmega128 microcontroller wherein the GCC 3.2 is used to fully program the microcontroller while VB 6 is used to program the PC interface.
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.
Using high efficient step down voltage regulators instead of linear voltage regulators that waste power as heat and requires large heatsinks in most cases.