HC-89 Interrupt Sensor - Correlation Photoelectric Infrared Count Slot Sensor Module Rain Drop Sensor A buffer is simply a

A buffer is simply a unity-gain amplifier

It transfers heat from the cooler side to the hotter side by operating on the principle of the Peltier effect

This FSR  will vary its resistance depending on how much pressure is being applied to the sensing area

Resistor Kit

HC-89 Interrupt Sensor - Correlation Photoelectric Infrared Count Slot Sensor Module Rain Drop Sensor A buffer is simply aThe HC 89 Interrupt Sensor is designed for motion detection and is commonly used in security systems, automation, and sensing applications. This Correlation Photoelectric Infrared Count Slot Sensor Module utilizes infrared technology to detect motion or interruptions in its field of view. When an object is detected, it triggers an interrupt signal, which can be processed by a microcontroller or other control systems. Its simple interface makes it easy