Item Tag: FZ4165

Overview: This is a commonly used single-channel relay module that uses the HK4100F-DC 5V-SHC relay component. The relay has three green terminals for external circuits, they are NO COM and NC (back screen). When the relay is not connected to the control signal, the COM and the NC terminals are connected, and the COM and the NO terminals are disconnected. When controlling, we connect GND to the MCU GND, VCC to the MCU 5V, and S to the MCU digital port. When the S signal terminal is set to a high level, the relay is turned on, the COM and the NC terminals of the relay are disconnected, and the COM terminal and the NO terminal are connected; when the S signal terminal is set to a low level, the relay is closed, and the COM terminal and the NC terminal are connected,.