Building blocks of mechatronic products. Definition, Identification, and Classification of mechatronic components. Sensors. Classification of sensors. Proximity, angular displacement, rotational measurement sensors. Force and torque measurement sensors. Pressure sensors. Accelerometers. Gyros. Temperature and humidity sensors. Light detection and CMOS imaging sensors. Actuators. Classification of actuators. Power amplification and modulation. Typical power amplifiers. Electrical machines. DC motors. Brushed and brushless DC motors. Piezoelectric actuators. Fluid systems and hydraulic actuators. Pneumatic actuators.