ElecFreaks
16 Channel 5V Mini-Relay Module BK_RL16_01
A compact 16-channel relay module using HUIKE mini-relays, providing optocoupler-isolated control of up to 16 independent circuits. Despite having 16 channel...
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A compact 16-channel relay module using HUIKE mini-relays, providing optocoupler-isolated control of up to 16 independent circuits. Despite having 16 channels, the board is close in size to a standard 8-channel relay module thanks to the mini-relay form factor.
Each channel has a dedicated LED indicator showing the relay state, and the board includes a power LED. The optocoupler isolation protects your microcontroller circuit from relay switching noise. An elec-blocks socket allows direct relay control using a shunt cap without requiring an MCU.
Key Features
- 16 Independent Channels – Each with optocoupler isolation and LED status indicator
- Compact Design – Ultra-small volume, close to the size of an 8-channel module
- Optocoupler Isolation – Protects your microcontroller from switching noise
- 5V/12V TTL Control – Compatible with Arduino, Raspberry Pi, PIC, ARM, and MSP430
- Elec-Blocks Socket – Direct relay control via shunt cap (no MCU required)
Specifications
- Drive Voltage – 5V / 12V
- Drive Current – 20 mA per channel
- Control Signal – 5V/12V TTL level
- Max Switching Voltage – 150VAC / 24VDC
- Max Switching Current – 2A
- Relay Type – HUIKE mini-relay
- Indicators – Power LED + 16× channel LEDs
- Mounting Holes – 3 mm
- Dimensions – 85 × 72 mm
- PCB Colour – White
Ideal For
- Home automation and lighting control
- Multi-channel equipment switching
- Arduino and microcontroller relay projects
- IoT control panels
Package Contents
- 1× 16-channel mini-relay module (BK_RL16_01)
Jargon buster
Plain-language definitions for the technical terms used above.
- IoT
- Short for Internet of Things, meaning physical devices that connect to networks or the internet to send data or be controlled remotely. It matters if you want projects such as connected sensors, remote controls or classroom data-logging activities.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- PCB
- A printed circuit board (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
- Relay module
- A relay module uses an electrically controlled switch to let a low-power microcontroller control a separate circuit. It matters when switching devices that need different voltages or more current than a microcontroller pin can safely handle.
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