8-Channel 5V Relay Module, Optocoupler-Free, Jumper-Selectable Trigger

This 8-channel relay module gives a project control over eight independent high-power circuits from a single board, each channel rated to switch up to AC250V at 10A or DC30V at 10A, enough for household appliances, lighting circuits, or multiple lower-voltage DC loads like motors or solenoids. Running from a 5V supply and triggered by a 5mA control signal, it draws very little current to operate the relay coils' driver stage, keeping the load on a microcontroller's own power supply minimal despite controlling eight separate high-power circuits.

Each of the eight channels can be individually configured via jumper to trigger on either a high signal or a low signal, giving flexibility to match whatever logic convention a specific microcontroller project uses, rather than being locked into one fixed trigger polarity across the whole board. A genuinely useful safety behavior is built in: if the control line to a channel is disconnected entirely, that relay stays off rather than defaulting to an unpredictable state, reducing the risk of a loose connection accidentally energizing a load.

Status feedback is comprehensive for a board this size: a single green power LED confirms the board itself is receiving power, while eight individual red LEDs, one per channel, show which relays are currently active, making it straightforward to visually confirm the board's state without needing a multimeter or checking code output. A terminal block handles the high-power wiring connections, and fixed bolt holes are provided for securely mounting the board inside an enclosure rather than leaving it loose.

At 138mm by 43mm by 17mm and 100g, it's a substantial board reflecting the eight real relays packed onto it, and it's rated for -40C to 85C operation, giving real tolerance for installation in an unconditioned space like a garage or utility closet. Builders working on home automation projects, irrigation controllers, or any system needing to switch several independent high-power circuits from one microcontroller will find the 8-channel layout and per-channel trigger flexibility a genuinely capable, well-indicated board for the job.