CHAPTER 8Power Projects
HAVING LOOKED AT LIGHT and sound, the Evil Genius now turns his or her attention to controlling power. In essence, this means turning things on and off and controlling their speed. This mostly applies to motors and lasers and the long-awaited servo-controlled laser project.
Project 22LCD Thermostat
The temperature in the Evil Genius’ lair must be regulated because the Evil Genius is particularly susceptible to chills. This project uses an LCD screen and a temperature sensor to display both the current temperature and the set temperature. It uses a rotary encoder to allow the set temperature to be changed. The rotary encoder’s button also acts as an override switch.
When the measured temperature is less than the set temperature, ...
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