8 Pack 5V Relay Module One Channel Board With Opto Isolation High Or Low Trigger For Arduino And Other Microcontroller Projects Great For DIY Projects Smart Home Automation And Robotics

Eight 5V Relay Modules Pack for Arduino Projects
✔️ 8-pack, 1-channel 5V relay with opto isolation and trigger

The eight-pack 5V relay board is a single-channel unit designed to switch high voltage devices from low voltage microcontroller signals. It's ideal for DIY projects, home automation, robotics, and test benches.

✅ 8PCS 5V Relay Board, 1 channel per board, TTL control input
✅ Peak load: AC125-250V/10A, DC28-30V/10A; coil voltage 5V; size 22mm x 34mm x 17mm
✅ Optocoupler isolation with jumper for high/low trigger
✅ Relay terminals: NC, COM, NO and input terminals for coil +/--
✅ Compatible with Arduino, Raspberry Pi, PIC, AVR; great for DIY, smart home, robotics
✅ Fault-tolerant interface; relay stays off if control line breaks

💡 What is a 5V relay module used for in Arduino and DIY projects?

In simple terms, a 5V relay module lets a microcontroller switch high voltage devices safely.

- Handy for switching mains loads from a microcontroller
- Opto-isolation protects the controller from relay coil spikes
- Works with TTL/CMOS outputs on popular boards
- NC/NO/COM terminals provide flexible wiring options