Grove - 2-Channel SPDT Relay

Two-channel Grove relay module with SPDT contacts, controlled by a 5 V GPIO signal. Switches up to 250 V AC or 110 V DC per channel; connects via standard 4-pin Grove cable.

VCC
Grove control-side supply for the relay module; Seeed lists operating voltage as 5V
Type · powerVoltage · 5V
GND
Grove control-side ground/common reference
Type · groundVoltage · 0V
SIG1
Digital input controlling relay K1; Seeed states SIG1 high turns Q1 on, energising K1 so COM1 connects to NO1
Type · digital inputVoltage · 5V logic per Seeed relay schematic explanation
SIG2
Digital input controlling the second relay channel; Seeed lists the module input interface as Digital SIG1/SIG2
Type · digital inputVoltage · 5V logic per module operating voltage
COM1
Common terminal for relay channel 1; default connects to NC1, energised relay connects COM1 to NO1
Type · switched terminal

Relays

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Pin	Type	Function	Voltage
VCC	power	Grove control-side supply for the relay module; Seeed lists operating voltage as 5V	5V
GND	ground	Grove control-side ground/common reference	0V
SIG1	digital input	Digital input controlling relay K1; Seeed states SIG1 high turns Q1 on, energising K1 so COM1 connects to NO1	5V logic per Seeed relay schematic explanation
SIG2	digital input	Digital input controlling the second relay channel; Seeed lists the module input interface as Digital SIG1/SIG2	5V logic per module operating voltage
COM1	switched terminal	Common terminal for relay channel 1; default connects to NC1, energised relay connects COM1 to NO1	load side, Seeed rating up to 10A 250VAC / 10A 30VDC
NC1	switched terminal	Normally-closed terminal for relay channel 1; connected to COM1 when K1 is not energised	load side, Seeed rating up to 10A 250VAC / 10A 30VDC
NO1	switched terminal	Normally-open terminal for relay channel 1; connected to COM1 when K1 is energised	load side, Seeed rating up to 10A 250VAC / 10A 30VDC
COM2	switched terminal	Common terminal for relay channel 2, matching the second SPDT relay output channel	load side, Seeed rating up to 10A 250VAC / 10A 30VDC
NC2	switched terminal	Normally-closed terminal for relay channel 2, matching the second SPDT relay output channel	load side, Seeed rating up to 10A 250VAC / 10A 30VDC
NO2	switched terminal	Normally-open terminal for relay channel 2, matching the second SPDT relay output channel	load side, Seeed rating up to 10A 250VAC / 10A 30VDC

Pinout

LED pixels

Bare ICs

Converters

Memory