Product Description
The 8 Channel 5V Relay Module Board is a robust, optocoupler-isolated relay shield designed to control up to 8 high-voltage or high-current devices from a low-voltage Arduino, ESP32, Raspberry Pi, or any 5V microcontroller. With selectable high and low level triggering on each channel group, it offers maximum flexibility for home automation, industrial control, and robotics switching applications.
Key Specifications:
| Feature | 5V Version | 12V Version |
|---|---|---|
| Working Voltage | 5V | 12V |
| Static Current | 5mA | 5mA |
| Maximum Current | 190mA | 80mA |
| Trigger Voltage Low | 0 – 1.5V | 0 – 1.4V |
| Trigger Voltage High | 3 – 5V | 5 – 12V |
| Trigger Current | 2 – 4mA | 2 – 4mA |
| Maximum Load | AC250V/10A | DC30V/10A |
Board Features:
- 8 independent relay channels
- Optocoupler isolation on every channel — protects microcontroller from load-side interference
- Selectable high/low level trigger per channel group: Channels 1–4: independent trigger select terminal, Channels 5–8: independent trigger select terminal
- Relay output control terminals — screw terminal block per channel (NO/COM/NC)
- Power supply and signal triggering end clearly labeled
- Standard mounting holes for enclosure or panel installation
- LED indicator per channel visual status of each relay
Typical Applications:
- Home automation — controlling lights, fans, appliances
- Industrial equipment switching and control panels
- Arduino and ESP32 IoT relay control
- Solenoid valve and motor switching
- Smart irrigation systems
- HVAC and temperature control switching
- Alarm and security systems
- High-voltage load control from low-voltage logic
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