HC-89 Interrupt Sensor

HC-89 Interrupt Sensor Module 

Overview

The HC-89 Interrupt Sensor Module is a simple electronic module designed to detect external trigger signals and generate an interrupt output for microcontrollers.

It is commonly used in:

• Arduino/ESP projects

• Event counting systems

• Alarm and trigger systems

Working Principle

• The module monitors an input signal (trigger pin)

• When a change occurs (HIGH LOW), it generates a digital output

• This output can be connected to a microcontroller interrupt pin

Based on the concept of a Digital Signal (HIGH/LOW switching)

Infographic Summary

ENSOR Function: Trigger detect Voltage: 3.3V 5V Output: Digital (HIGH/LOW) Response: Instant Use: Interrupt signals Edge detection

Pin Configuration (Typical)

Supports edge-trigger detection (rising/falling)

Low power consumption

Key Features

• Fast interrupt signal generation

• Simple interface

• Reliable trigger detection

• Works with various sensors (IR, switches, etc.)

• Low cost module

Applications

• Pulse counting systems

• Switch/door trigger detection

• Robotics event handling

• Alarm systems

• Signal monitoring

• Input trigger for microcontrollers

Interfacing

Works with:

• Arduino

• ESP32 / ESP8266

• Raspberry Pi

Sensor detects object

HC-89 generates interrupt

Microcontroller increments counter

Important Notes

• Not a standalone sensor needs input signal

• Output depends on input signal quality

• May require debounce for mechanical switches

• Check logic level compatibility

Interrupt Module vs Direct Input

Pro Tip

• Use with IR sensors, reed switches, oong> for real-time response

Ideal for fast event detection projects