5V one-way relay module KY-019 1-way long boad optocoupler relay module with optocoupler isolation

5V one-way relay module KY-019 2-way optocoupler relay module with optocoupler isolation

5V one-way relay module KY-019 4-way optocoupler relay module with optocoupler isolation

8 channel 5V relay driver module

16 channel 5V relay driver module

16 channel 5V relay driver module

RC522 RFID radio frequency IC card induction module comes with S50 Fudan card and keychain

10-Position Rotary Switch with 6mm Knob Cap

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Soil Moisture Meter Testing Module, Soil Humidity Sensor Compatible With Arduino by Atomic Market: I