Description

Product Description

The LampaTronics 8-Channel 5V Serial Control Relay Module is a compact, professional relay control board designed for controlling 8 independent electrical loads using a simple 3-wire serial interface.

The module uses DIN, CLK, and LAT control signals, allowing a microcontroller or digital control system to send relay commands using a shift-register-style serial interface. An additional OUT, CLK, and LAT connector allows the serial data to be passed to another module, making the system suitable for daisy-chain expansion.

The board includes 8 individual relays, each with its own status LED, and provides screw-terminal connections for the relay contacts. Separate +5V/GND power terminals are provided for convenient system wiring.

Its compact design makes it suitable for automation systems, embedded controllers, industrial prototypes, lighting control, pump control, motor control, and custom electronic projects.

Key Features

8 independent relay channels
5V DC operating supply
3-wire serial control interface
DIN / CLK / LAT input
OUT / CLK / LAT serial output for cascading
Supports daisy-chain expansion
Individual LED status indicator for each relay
Individual screw-terminal connections for relay contacts
Dedicated +5V and GND power terminals
Compact PCB design
Suitable for microcontroller-based control systems
Ideal for multi-channel automation applications

Interface

Serial Input

The module provides a 3-pin input connector:

Pin Function DIN Serial Data Input CLK Serial Clock LAT Latch

The controller sends the relay control data through DIN, synchronizes the data using CLK, and transfers the received data to the relay outputs using LAT.

Serial Output

The module also provides:

Pin Function OUT Serial Data Output CLK Serial Clock LATLatch

Compatible Controllers

The module can be integrated with systems capable of generating the required DIN / CLK / LAT serial control signals, including:

Arduino
ATmega-based controllers
ESP32
STM32
Raspberry Pi with suitable interface circuitry
Custom microcontroller boards
PLC/control systems with compatible digital outputs

For controllers operating at a different logic voltage, such as 3.3V systems, verify the logic-level requirements before direct connection. A level-shifting circuit may be appropriate depending on the final hardware design.