Similar to 12019 and 12020. But the sensor is replaced by a capacitor, which when charged will switch on the relay.
DC-DC BUCK CONVERTER LM2596S STEP-DOWN MODULE
DC-DC BUCK CONVERTER XL4015 STEP-DOWN MODULE
EFK 12000 Just Whistle
EFK 12001 Infra -Red Link
EFK 12002 Infra -Red Remote Control
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