PID Controller Experiment In this experiment, we will explore the operation of a PID controller using both Arduino and Raspberry Pi. The program for the PID controller using Arduino is taken from the library, while the program for the PID controller using Raspberry Pi will need to be manually typed...

Turning off the heater when the temperature sensor indicates that the heater is hotter than the set temperature and turning it on when it's cooler than that leads to a system where the temperature "oscillates" around the set value. For more precise temperature control, proportional-integra...

Using a transistor to toggle power on and off allows achieving a high-speed switching process and harnessing Pulse Width Modulation (PWM) technology. However, for certain systems, frequent power cycling of a device is highly undesirable. This can apply to household heaters that require time to start...

While these lessons primarily focus on actuator devices such as motors, heaters, light sources, and other "output devices," many circuits employing actuator devices also incorporate sensors to monitor the behavior of these actuator devices. A characteristic example is a thermostat-controll...

Peltier Elements (see figure below) possess a highly useful property where passing current through them causes one side of the element to become hotter while the other side becomes colder. To make this happen, the current flowing through it needs to be substantial (typically between 2 to 6 A at 12 ...

At the household level, the terms power and energy are often used interchangeably. However, from a scientific standpoint, the concepts of power and energy are as distinct as velocity and distance. In reality, power is the rate of transfer or conversion of energy. The power of a heating element is th...

In practical terms, resistors are not the best choice as heaters. If you need to heat something, you should use specialized heating elements (heaters). Heating elements, essentially, are large resistors made from materials specifically designed for heating and transferring heat to the object you int...

The procedure for turning an electric motor on and off is quite familiar to you. Similarly, power is supplied to the resistor and taken from it. Any of the previous experiments involving turning the motor on and off can be easily replicated by replacing the motor with a resistor. Even pulse-width mo...

As we discussed earlier, a resistor generates heat by resisting the flow of current. As you may recall, the amount of heat generated in watts is equal to the product of the current passing through the resistor in amperes and the voltage drop across the resistor in volts.

This section covers devices for generating heat and cold, such as resistive heating elements and Peltier devices. The main focus here is on the construction of heaters and coolers. Information on how these heaters and coolers can be used in conjunction with Arduino and Raspberry Pi for precise tempe...