5V 8-Channel Relay Module with Optocoupler for MCU Control

5V 8-Channel Relay Module with Optocoupler (MCU Compatible) Overview: Compact 8-channel relay board with optocouplers for safe, low-noise control of AC/DC loads from microcontrollers like Arduino and Raspberry Pi. Easy TTL interface, indicator LEDs, and reliable relay protection make it ideal for DIY, automation, and smart-home projects. Specifications Output channels: 8 Power supply: 5V Control signal: TTL (optocoupler isolated) Driver current per channel: 15–20 mA Load rating: AC 250V 10A / DC 30V 10A Contact types: Normally Open (NO) and Normally Closed (NC) Protection: Relay coil diode; transistor drive for high-impedance control Indicators: Power LED + 8 channel status LEDs Board size: 137 × 56 × 17 mm Mounting holes: 3 mm; center distance 132 × 50 mm Compatibility: Arduino, Raspberry Pi, AVR, PIC, STM32 and other TTL MCU systems
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