Microcontroller Serial to Parallel Pin IO Expansion Module 74HC595 Output Port Expansion 3 to 24pin LED control

The 74HC595 Serial-to-Parallel Expansion Module is a GPIO expansion board based on three cascaded 74HC595 shift register ICs. It converts serial input data into 24 parallel digital output channels, allowing microcontrollers to control multiple outputs using only a few GPIO pins. The module is widely used in LED control, display driving, relay expansion, and digital output applications.

Technical Specifications:

• Module Type: Serial-to-Parallel GPIO Expansion Module
• Main IC: 3 × 74HC595 Shift Register ICs
• Number of Output Channels: 24 Digital Outputs
• Input Control Signals: Data (DS), Clock (SHCP), Latch (STCP)
• Output Logic Type: TTL Digital Output
• Operating Voltage: 2V – 6V DC
• Logic Compatibility: 3.3V and 5V systems
• Communication Interface: SPI-like Serial Interface
• Maximum Output Current: Approx. 20mA per output pin

Features:

• Expands microcontroller GPIO pins from 3 pins to 24 outputs
• Uses high-speed 74HC595 shift register ICs
• Supports cascading for additional outputs
• Compatible with Arduino, ESP32, STM32, AVR, PIC, and Raspberry Pi
• Simple SPI-like serial communication
• Stable and reliable digital output control
• Compact PCB design with pin headers included
• Suitable for LED driving and digital switching applications
• Low power consumption
• Easy integration into embedded projects

Applications:

• LED matrix control
• 7-segment display driving
• Relay control systems
• Digital output expansion
• Home automation systems
• Industrial control interfaces
• Robotics projects
• Arduino and ESP32 projects
• Sequential lighting systems
• DIY electronics and prototyping